Significant nitrate attenuation in a mangrove-fringed estuary during a flood-chase experiment.
Abstract Intertidal wetlands can sequester pollutants along estuarine conduits. Here we test the effectiveness of a mangrove-dominated estuary in removing dissolved nitrogen during a rain event. We intensively and simultaneously sampled surface water nutrients upstream and downstream of an estuary before, during and after a 63 mm rain event in Coffs Creek (Australia). NOx was the main form of dissolved nitrogen upstream of the estuary (∼60%), while dissolved organic nitrogen (DON) was an important form at the downstream station (∼46%) during observations. High NOx attenuation (71%) occurred during the ra...
Source: Environmental Pollution - August 23, 2019 Category: Environmental Health Authors: Wadnerkar PD, Santos IR, Looman A, Sanders CJ, White S, Tucker JP, Holloway C Tags: Environ Pollut Source Type: research
Pyrethrum extract encapsulated in nanoparticles: Toxicity studies based on genotoxic and hematological effects in bullfrog tadpoles.
This study aims to evaluate genotoxic and hematological biomarkers in bullfrog tadpoles (Lithobates catesbeianus) submitted to acute exposure (48 h) to pyrethrum extract (PYR) and solid lipid nanoparticles loaded with PYR. Results showed increased number of leukocytes during acute exposure, specifically eosinophils in nanoparticle-exposed groups, and basophil in PYR-exposed group. Hematological analysis showed that PYR encapsulated in nanoparticles significantly increased the erythrocyte number compared to the other exposed groups. Data from the comet assay indicated an increase in frequency of the classes that correspon...
Source: Environmental Pollution - August 23, 2019 Category: Environmental Health Authors: Oliveira CR, Garcia TD, Franco-Belussi L, Salla RF, Souza BFS, de Melo NFS, Irazusta SP, Jones-Costa M, Silva-Zacarin ECM, Fraceto LF Tags: Environ Pollut Source Type: research
A multi-path chain kinetic reaction model to predict the evolution of 1,1,1-trichloroethane and its daughter products contaminant-plume in permeable reactive bio-barriers.
This study demonstrates that model C1 is able to predict the 1,1,1-TCA breakthrough time and rapidly evaluate the Bio-PRBs retardation performance. The results show that microbial growth and immobilization are the key factors that affect the retardation and remediation performance of Bio-PRBs. The free growth of microorganisms had significant negative effects on hydraulic conductivity (K) in the zero-valent iron (ZVI) region of free microorganism Bio-PRBs (FM-PRBs). The total head loss in the FM-PRB was 9.0 cm, which was significantly greater than the head loss (6.5 cm) of immobilized microorganism Bio-PRBs (IM-PRBs). ...
Source: Environmental Pollution - August 23, 2019 Category: Environmental Health Authors: Wang W, Wu Y Tags: Environ Pollut Source Type: research
Arthritis diagnosis and early-life exposure to air pollution.
Abstract OBJECTIVES: Evaluate the relationship between arthritis diagnosis in those over 50 and exposure to extreme air pollution in utero or infancy (
Source: Environmental Pollution - August 23, 2019 Category: Environmental Health Authors: Shepherd A, Mullins JT Tags: Environ Pollut Source Type: research
Biochar can mitigate methane emissions by improving methanotrophs for prolonged period in fertilized paddy soils.
Abstract Biochar application to fertilized paddy soils has been recommended as an effective countermeasure to mitigate methane (CH4) emissions, but its mechanism and effective duration has not yet been adequately elucidated. A laboratory incubation experiment was performed to gain insight into the combined effects of fresh and six-year aged biochar on potential methane oxidation (PMO) in paddy soils with ammonium or nitrate-amendment. Results showed that both ammonium and nitrate were essential for CH4 oxidation though high ammonium (4 mM) inhibited PMO as compared to low ammonium (1 mM and 2 mM), and that n...
Source: Environmental Pollution - August 23, 2019 Category: Environmental Health Authors: Wu Z, Song Y, Shen H, Jiang X, Li B, Xiong Z Tags: Environ Pollut Source Type: research
The effects of biodegradation on the characteristics and disinfection by-products formation of soluble microbial products chemical fractions.
This study observed the relative contribution of chemical fractions in SMPs and explored the biodegradation of each fraction and their effect on disinfection by-products (DBPs) formation in surface water. The hydrophilic acid (HPIA) and hydrophobic acid (HPOA) constituted the major portion of the SMPs, which were dominated by fulvic acid and humic acids. The transphilic acid (TPIA) and hydrophobic bases (HPOB) were relatively minor but it contained a relative substantial portion of protein-like materials in SMPs. TPIA and HPOB produced insignificant amounts of DBP corresponding to 13% and 14% in the original samples, but t...
Source: Environmental Pollution - August 23, 2019 Category: Environmental Health Authors: Wu M, Liang Y, Zhang Y, Xu H, Liu W Tags: Environ Pollut Source Type: research
Molecular modeling and MD-simulation studies: Fast and reliable tool to study the role of low-redox bacterial laccases in the decolorization of various commercial dyes.
Abstract Synthetic dyes are toxic and carcinogenic in nature, which also causes environmental pollution. The present study was aimed to decolorize various commercial dyes using purified recombinant bacterial laccases. Laccase gene from Yersinia enterocolitica strain 8081 (yacK), Y. enterocolitica strain 7 (yacK) and Bacillus pumilus DSKK1 was cloned in vector pET28a and overproduced in host Escherichia coli BL21. The high yield of recombinant laccase protein resulted in the formation of inclusion bodies, which were further solubilized, refolded, and purified. The purified recombinant laccases were alkali-tole...
Source: Environmental Pollution - August 23, 2019 Category: Environmental Health Authors: Ahlawat S, Singh D, Virdi JS, Sharma KK Tags: Environ Pollut Source Type: research
Facile synthesis of GO and g-C3N4 nanosheets encapsulated magnetite ternary nanocomposite for superior photocatalytic degradation of phenol.
In this study, the synthesis of Fe3O4@GO@g-C3N4 ternary nanocomposite for enhanced photocatalytic degradation of phenol has been investigated. The surface modification of Fe3O4 was performed through layer-by-layer electrostatic deposition meanwhile the heterojunction structure of ternary nanocomposite was obtained through sonicated assisted hydrothermal method. The photocatalysts were characterized for their crystallinity, surface morphology, chemical functionalities, and band gap energy. The Fe3O4@GO@g-C3N4 ternary nanocomposite achieved phenol degradation of ∼97%, which was significantly higher than that of Fe3O4@GO ...
Source: Environmental Pollution - August 23, 2019 Category: Environmental Health Authors: Rehman GU, Tahir M, Goh PS, Ismail AF, Samavati A, Zulhairun AK, Rezaei-DashtArzhandi Tags: Environ Pollut Source Type: research
Particulate matter accumulation capacity of plants in Hanoi, Vietnam.
Abstract Population growth, urbanization, environmental conditions and rapid development have caused particulate matter (PM) levels to rise above all national and international health standards during the last two decades in many South-East Asian countries. These PM levels needs to be reduced urgently as they increase the risk of cardiovascular and respiratory health problems for millions of people. Plants have shown to efficiently reduce PM in the air by accumulation on their leaves. In order to investigate which plant species accumulate most PM, we screened 49 common plant species for their PM accumulation capac...
Source: Environmental Pollution - August 23, 2019 Category: Environmental Health Authors: Bertold M, Joachim M, Hoa NX, Cuong NT, Sinh NV, Roeland S Tags: Environ Pollut Source Type: research
PM2.5 elements at an urban site in Yangtze River Delta, China: High time-resolved measurement and the application in source apportionment.
Abstract Elemental concentrations of ambient aerosols are commonly sampled over 12-24 h, and the low time resolution puts a great limit on current understanding about the temporal variations and source apportionment based on receptor models. In this work, hourly-resolved concentrations of eighteen elements in PM2.5 at an urban site in Nanjing, a megacity in Yangtze River Delta of east China, were obtained by using a Xact 625 ambient metals monitor from 12/12/2016 to 12/31/2017. The influence of traffic activities was clearly reflected by the spikes of crustal elements (e.g., Fe, Ca, and Si) in the morning rush h...
Source: Environmental Pollution - August 23, 2019 Category: Environmental Health Authors: Yu Y, He S, Wu X, Zhang C, Yao Y, Liao H, Wang Q, Xie M Tags: Environ Pollut Source Type: research
Study on stable mass transfer and enrichment of phenol by 1-octanol/kerosene/polyvinyl chloride polymer inclusion membrane.
Abstract A polymer inclusion membrane (PIM) that contains a polyvinyl chloride (PVC) polymer matrix and 1-octanol (OCT) as speciﬁc carrier (PO-PIM) was prepared to investigate the mass transfer behaviour of phenol in aqueous solutions. Results showed that the mass transfer behaviour of the PO-PIM for phenol conformed to the first-order kinetics. In addition, the mass transfer efficiency for phenol reached the maximum when the OCT content was 82.8 wt%. The mass transfer activation energy (Ea) was 14.46 kJ mol-1, which indicated that intramembranous diffusion was the main controlling factor in the mass trans...
Source: Environmental Pollution - August 23, 2019 Category: Environmental Health Authors: Meng X, Song Y, Lv Y, Xin X, Ren T, Wang X Tags: Environ Pollut Source Type: research
Macrobenthos functional trait responses to heavy metal pollution gradients in a temperate lagoon.
Abstract Biological traits analysis (BTA) can help identify the effect of various contaminants on functional trait composition of macrobenthos. However, the effects of bioavailable heavy metals on functional traits of macrobenthos communities remain to be examined. We sampled macrobenthos communities and assessed environmental variables over gradients of heavy metal pollution in Swan Lagoon, China. The RLQ and fourth-corner approaches were used to investigate the response of functional traits to heavy metal pollution. Our findings suggested that macrobenthic functional traits can be used to distinguish the effects...
Source: Environmental Pollution - August 23, 2019 Category: Environmental Health Authors: Hu C, Dong J, Gao L, Yang X, Wang Z, Zhang X Tags: Environ Pollut Source Type: research
Combined spatial and retrospective analysis of fluoroalkyl chemicals in fluvial sediments reveal changes in levels and patterns over the last 40 years.
Abstract Bed sediments and a dated sediment core were collected upstream and downstream from the city of Lyon (France) to assess the spatial and temporal trends of contamination by per- and polyfluoroalkyl substances (PFASs) in this section of the Rhône River. Upstream from Lyon, concentrations of total PFASs (ΣPFASs) in sediments are low (between 0.19 and 2.6 ng g-1 dry weight - dw), being characterized by a high proportion of perfluorooctane sulfonate (PFOS). Downstream from Lyon, and also from a fluoropolymer manufacturing plant, ΣPFASs concentrations reach 48.7 ng g-1 dw. A gradual de...
Source: Environmental Pollution - August 23, 2019 Category: Environmental Health Authors: Mourier B, Labadie P, Desmet M, Grosbois C, Raux J, Debret M, Copard Y, Pardon P, Budzinski H, Babut M Tags: Environ Pollut Source Type: research
Effects of four food dyes on development of three model species, Cucumis sativus, Artemia salina and Danio rerio: Assessment of potential risk for the environment.
Abstract Food dyes, or color additives, are chemicals added to industrial food products and in domestic cooking to improve the perceived flavor and attractiveness. Of natural and synthetic origin, their safety has been long discussed, and concern for human safety is now clearly manifested by warnings added on products labels. Limited attention, however, has been dedicated to the effects of these compounds on aquatic flora and fauna. For this reason, the toxicity of four different commercially available food dyes (cochineal red E120, Ponceau red E124, tartrazine yellow E102 and blue Patent E131) was assessed on thr...
Source: Environmental Pollution - August 23, 2019 Category: Environmental Health Authors: Motta CM, Simoniello P, Arena C, Capriello T, Panzuto R, Vitale E, Agnisola C, Tizzano M, Avallone B, Ferrandino I Tags: Environ Pollut Source Type: research
Bacterial community rather than metals shaping metal resistance genes in water, sediment and biofilm in lakes from arid northwestern China.
This study investigated heavy metal pollution to identify possible correlations with metal resistance genes (MRGs) and bacterial community composition in water, sediment and biofilm samples from Bosten Lake and Ebi Lake in northwestern China. High levels of zinc were detected in all samples. However, the metals detected in the sediment samples of both lakes were determined to be at low risk levels according to an ecological index. The mercury resistance gene subtype merP had the greatest average abundance (4.61 × 10-3 copies per 16S rRNA) among all the samples, followed by merA and merC. The high abundance of mer...
Source: Environmental Pollution - August 10, 2019 Category: Environmental Health Authors: Song W, Qi R, Zhao L, Xue N, Wang L, Yang Y Tags: Environ Pollut Source Type: research
Enhanced degradation of triphenyl phosphate (TPHP) in bioelectrochemical systems: Kinetics, pathway and degradation mechanisms.
This study aimed to investigate the accelerated degradation of TPHP in a three-electrode single chamber bioelectrochemical system (BES). Significant increase of degradation efficiency of TPHP in the BES was observed compared with open circuit and abiotic controls. The one-order degradation rates of TPHP (1.5 mg L-1) were increased with elevating sodium acetate concentrations and showed the highest value (0.054 ± 0.010 h-1) in 1.0 g L-1 of sodium acetate. This result indicated bacterial metabolism of TPHP was enhanced by the application of micro-electrical field and addition acetate as co-substrates. TPHP...
Source: Environmental Pollution - August 10, 2019 Category: Environmental Health Authors: Hou R, Luo X, Liu C, Zhou L, Wen J, Yuan Y Tags: Environ Pollut Source Type: research
Bacterioplankton community in response to biological filters (clam, biofilm, and macrophytes) in an integrated aquaculture wastewater bioremediation system.
In this study, we implemented a comprehensive restoration technology combined with bio-filters [biofilm, clam (Tegillarca granosa), and macrophytes (Spartina anglica)] to investigate their influence on the stability of the BC and nutrient removal. We found that the diversity of BC was linked with biogeochemical factors in processing and upcycling nitrogen-rich effluents into high-value biomass. The BC exhibited significant distinct patterns in the bio-filter areas. Potential biomarkers for constrained harmfully algae-bacteria (Nitriliruptoraceae, Bacillales, and Rhodobacteraceae) and nutrient removal were significantly hig...
Source: Environmental Pollution - August 9, 2019 Category: Environmental Health Authors: Lukwambe B, Zhao L, Nicholaus R, Yang W, Zhu J, Zheng Z Tags: Environ Pollut Source Type: research
Stable carbon and nitrogen isotopic characterization and tracing nutrient sources of Ulva blooms around Jeju coastal areas.
Abstract The present investigation was aimed to characterize the Ulva blooms and to identify the probable sources for Ulva blooms along the Jeju Island coast for pertinent control measures. Algal isotope signatures (δ13C, δ15N and δ18O) and tissue nitrogen and carbon were analyzed to map nutrient sources around the Jeju coastal areas. The algal δ13C values were ranged from -20.52 to -4.39‰, while δ15N and δ18O values ranged from 4.26 to 8.29‰ and 12.80-17.34‰, respectively. Moreover, site-specific significant differences were observed in algal stab...
Source: Environmental Pollution - August 9, 2019 Category: Environmental Health Authors: Samanta P, Shin S, Jang S, Song YC, Oh S, Kim JK Tags: Environ Pollut Source Type: research
Source Apportionment of Volatile Organic Compounds (VOCs) by Positive Matrix Factorization (PMF) supported by Model Simulation and Source Markers - Using Petrochemical Emissions as a Showcase.
This study demonstrates the use of positive matrix factorization (PMF) in a region with a major Petrochemical Complex, a prominent source of volatile organic compounds (VOCs), as a showcase of PMF applications. The PMF analysis fully exploited the quality and quantity of the observation data, sufficed by a cluster of 9 monitoring sites within a 20 km radius of the petro-complex. Each site provided continuous data of 54 speciated VOCs and meteorological variables. Wind characteristics were highly seasonal and played a decisive role in the source-receptor relationship, hence the dataset was divided into three sub-sets in a...
Source: Environmental Pollution - August 8, 2019 Category: Environmental Health Authors: Su YC, Chen WH, Fan CL, Tong YH, Weng TH, Chen SP, Kuo CP, Wang JL, Chang JS Tags: Environ Pollut Source Type: research
On processes controlling fine particulate matters in four Indian megacities.
Abstract The data of most toxic particulate pollutants (PM2.5 and PM10) obtained from a dense SAFAR observational network in four Indian mega cities (Delhi, Mumbai, Pune and Ahmedabad) located in North-West part of India, not very far from each other, have been presented in this work. In spite of similar kind of sources of anthropogenic local emissions, each city has its unique air pollution footprints. The paper addresses the role of geographical location based prevailing meteorology in determining the variability of particulate matter in different seasons and processes responsible for the same. We hereby demonst...
Source: Environmental Pollution - August 8, 2019 Category: Environmental Health Authors: Anand V, Korhale N, Rathod A, Beig G Tags: Environ Pollut Source Type: research
Does the path of technological progress matter in mitigating China's PM2.5 concentrations? Evidence from three urban agglomerations in China.
Abstract Technological progress is widely considered to play an important role in reducing air pollution. While growing literature has explored the effects of technological progress on environmental quality, fewer studies have considered the varied effects exerted by different technological progress paths on PM2.5 concentrations. This paper explored the relationship between two different kinds of technological progress (indigenous innovation and technology diffusion) and PM2.5 concentrations. Indigenous innovation was in this study considered to be composed by research and development investment (R&D) and impo...
Source: Environmental Pollution - August 8, 2019 Category: Environmental Health Authors: Chen J, Wang S, Zhou C, Li M Tags: Environ Pollut Source Type: research
Proteomic analysis of the hepatotoxicity of Microcystis aeruginosa in adult zebrafish (Danio rerio) and its potential mechanisms.
The objective of this study was to evaluate the hepatotoxicity of M. aeruginosa in adult zebrafish (Danio rerio) after short-term (96 h) exposure and to elucidate the potential underlying mechanisms. Distinct histological changes in the liver, such as enlargement of the peripheral nuclei and sinusoids and the appearance of fibroblasts, were observed in zebrafish grown in M. aeruginosa culture. In addition, antioxidant enzyme activity was activated and protein phosphatase (PP) activity was significantly decreased with increasing microalgal density. A proteomic analysis revealed alterations in a number of protein...
Source: Environmental Pollution - August 8, 2019 Category: Environmental Health Authors: Du B, Liu G, Ke M, Zhang Z, Zheng M, Lu T, Sun L, Qian H Tags: Environ Pollut Source Type: research
Application of thermal desorption methods for airborne polycyclic aromatic hydrocarbon measurement: A critical review.
Abstract Thermal desorption (TD) is a universal solvent-free pre-concentration technique. It is often used to pre-concentrate semi-volatile and volatile organic compounds in various sample types. Polycyclic aromatic hydrocarbons (PAHs) are widespread contaminants from incomplete combustion of organic matter and fossil fuel, which have carcinogenic effects on human health. Conventional methods for determining PAHs, represented by solvent extraction, are gradually being replaced by solvent-free methods, typically the TD technique, because of TD's many advantages, including time savings and environmentally friendly t...
Source: Environmental Pollution - August 7, 2019 Category: Environmental Health Authors: Liu H, Ma S, Zhang X, Yu Y Tags: Environ Pollut Source Type: research
The climatology of aerosol optical thickness and radiative effects in Southeast Asia from 18-years of ground-based observations.
Abstract The present study utilizes 18 years of long-term (2001-2018) data collected from six active AERONET sites over the Indo-Gangetic Plain (IGP) and the North China Plain (NCP) areas in Southeast Asia. The annual mean (±SD) aerosol optical thickness at 440 nm (AOT440) was found high at XiangHe (0.92 ± 0.69) and Taihu (0.90 ± 0.51) followed by Beijing (0.81 ± 0.69), Lahore (0.81 ± 0.43), and Kanpur (0.73 ± 0.35) and low at Karachi (0.52 ± 0.23). Seasonally, high AOT440 with corresponding high Ångström exponent (ANG440-870) no...
Source: Environmental Pollution - August 7, 2019 Category: Environmental Health Authors: Khan R, Kumar KR, Zhao T Tags: Environ Pollut Source Type: research
An optimized density-based approach for extracting microplastics from soil and sediment samples.
This study provides an improved and optimized process for extraction of microplastic particles by modifying the floatation technique and floatation solution. Microplastics in soils and sediments are extracted by adding 200 g dry soil or sediment sample to 1.3 L mix of the saturated NaCl and NaI solutions in a volume ratio of 1:1 and aerating for 40 s then filtering the supernatant. The accuracy and precision of the new approach is validated by recovery experiments using soil and sediment samples spiked with six common microplastic compounds: polyethylene (PE), polyethylene terephthalate (PET), polypropylene (PP), pol...
Source: Environmental Pollution - August 7, 2019 Category: Environmental Health Authors: Han X, Lu X, Vogt RD Tags: Environ Pollut Source Type: research
Air quality assessment in different environmental scenarios by the determination of typical heavy metals and Persistent Organic Pollutants in native lichen Xanthoria parietina.
Abstract The study was aimed to evaluate the ability of native lichen Xanthoria (X.) parietina to biomonitor and bioaccumulate some heavy metals (As, Cd, Co, Cr, Ni, Pb), PAHs, PCDDs, PCDFs, PCBs and PBDEs and to evaluate the use of the native X. parietina as a multi-tracer tool for scenarios characterized by different anthropogenic pressures. Samples of native X. parietina were collected in six different sites (two green, two residential and two industrial areas, respectively) and analyzed for the target compounds. The results show that X. parietina was a useful tool for the biomonitoring of air qu...
Source: Environmental Pollution - August 7, 2019 Category: Environmental Health Authors: Vitali M, Antonucci A, Owczarek M, Guidotti M, Astolfi ML, Manigrasso M, Avino P, Bhattacharya B, Protano C Tags: Environ Pollut Source Type: research
Using Bayesian spatio-temporal model to determine the socio-economic and meteorological factors influencing ambient PM2.5 levels in 109 Chinese cities.
CONCLUSION: PM2.5 levels had significant spatio-temporal variations which were associated with socioeconomic and meteorological factors. Particularly, economic structure was a determinant factor of PM2.5 pollution rather than per capita GDP. This finding will be helpful for the intervention planning of particulate pollution control when considering the environmental and social-economic factors as part of the strategies. PMID: 31404733 [PubMed - as supplied by publisher] (Source: Environmental Pollution)
Source: Environmental Pollution - August 6, 2019 Category: Environmental Health Authors: Jin JQ, Du Y, Xu LJ, Chen ZY, Chen JJ, Wu Y, Ou CQ Tags: Environ Pollut Source Type: research
Effects of antidepressants with different modes of action on early life stages of fish and amphibians.
n G Abstract Drugs are excreted from the human body as both original substances and as metabolites and enter aquatic environment through waste water. The aim of this study was to widen the current knowledge considering the effects of waterborne antidepressants with different modes of action-amitriptyline, venlafaxine, sertraline-on embryos of non-target aquatic biota-fish (represented by Danio rerio) and amphibians (represented by Xenopus tropicalis). The tested concentrations were 0.3; 3; 30; 300 and 3000 μg/L in case of amitriptyline and venlafaxine and 0.1; 1; 10; 100 and 1000 μg/L for sertraline. Tes...
Source: Environmental Pollution - August 6, 2019 Category: Environmental Health Authors: Sehonova P, Hodkovicova N, Urbanova M, Örn S, Blahova J, Svobodova Z, Faldyna M, Chloupek P, Briedikova K, Carlsson G Tags: Environ Pollut Source Type: research
Environmentally relevant concentrations of arsenite induces developmental toxicity and oxidative responses in the early life stage of zebrafish.
This study provides novel insight into low concentration AsIII-induced toxicity in zebrafish. PMID: 31408795 [PubMed - as supplied by publisher] (Source: Environmental Pollution)
Source: Environmental Pollution - August 6, 2019 Category: Environmental Health Authors: Sun HJ, Zhang JY, Wang Q, Zhu E, Chen W, Lin H, Chen J, Hong H Tags: Environ Pollut Source Type: research
Microplastics in the environment: A critical review of current understanding and identification of future research needs.
Abstract Microplastics (plastic particles
Source: Environmental Pollution - August 5, 2019 Category: Environmental Health Authors: Akdogan Z, Guven B Tags: Environ Pollut Source Type: research
Enhanced biochar stabilities and adsorption properties for tetracycline by synthesizing silica-composited biochar.
Abstract The silica-composited biochars (SBC) were synthesized by adding silica particulates into bamboo biomass during pyrolysis at 700 °C to examine the effect of silica addition on biochar stabilities and adsorption properties for tetracycline (TC). Silica addition increased the total pore volume and average pore diameter of biochar due to the abundant mesopores in SBC, but decreased specific surface area due to the blockage of biochar pore with silica particles. Biochar stability was obviously enhanced with silica addition due to the decreased atomic ratio of H/C and O/C, the reduced C loss amount after ...
Source: Environmental Pollution - August 5, 2019 Category: Environmental Health Authors: Zhao Z, Nie T, Zhou W Tags: Environ Pollut Source Type: research
Effects of dissolved organic carbon on desorption of aged phenanthrene from contaminated soils: A mechanistic study.
Abstract Dissolved organic carbon (DOC) has a major influence upon sorption/desorption and transport of hydrophobic organic contaminants (HOCs) in soil environments. However, the molecular mechanisms of DOC sorption and its effects on aged HOC desorption in contaminated soils still remain largely unclear. Here, effects of three different DOC (one from commercial peat and two from biochars produced at 300 °C and 500 °C pyrolysis temperatures, respectively) and oxalate (as a reference) on abiotic desorption behavior of aged phenanthrene from three agricultural soils were investigated. Results showed that...
Source: Environmental Pollution - August 5, 2019 Category: Environmental Health Authors: Luo L, Chen Z, Cheng Y, Lv J, Cao D, Wen B Tags: Environ Pollut Source Type: research
Cooperation between partial-nitrification, complete ammonia oxidation (comammox), and anaerobic ammonia oxidation (anammox) in sludge digestion liquid for nitrogen removal.
In this study, NH4+-N removal by cooperation between partial-nitrification, comammox, and anammox processes was achieved in a sequencing batch reactor (SBR) for sludge digester liquor treatment. The results showed that 2100-2200 mg/L of NH4+-N was removed in the SBR with 98.82% removal efficiency. In addition, 55.11% of NH4+-N was converted to nitrite nitrogen (NO2--N) by partial-nitrification, 25.43% of NH4+-N was converted to nitrate nitrogen (NO3--N) by comammox, and 18.28% of NH4+-N was removed by anammox. During the operation, in the SBR, the relative abundance of the dominant ammonia-oxidizing bacteria (Chitinophag...
Source: Environmental Pollution - August 5, 2019 Category: Environmental Health Authors: Wu L, Shen M, Li J, Huang S, Li Z, Yan Z, Peng Y Tags: Environ Pollut Source Type: research
Correction of in-situ portable X-ray fluorescence (PXRF) data of soil heavy metal for enhancing spatial prediction.
In this study, robust geographically weighted regression (RGWR) was used to correct in-situ and ex-situ PXRF data of soil Pb in a peri-urban agricultural area of Wuhan City, China. The accuracy of the corrected PXRF data by RGWR was compared with those by non-spatial and spatial but non-robust methods (i.e., LR and GWR). In addition, to find an appropriate method of using the corrected PXRF data for more accurate spatial prediction, we compared robust ordinary kriging with the corrected PXRF data as part of hard data (ROK-CPXRF) and robust ordinary cokriging with the corrected PXRF data as auxiliary soft data (RCoK-CPXRF)....
Source: Environmental Pollution - August 5, 2019 Category: Environmental Health Authors: Qu M, Chen J, Li W, Zhang C, Wan M, Huang B, Zhao Y Tags: Environ Pollut Source Type: research
Evaluation of the infiltration of polystyrene nanobeads in zebrafish embryo tissues after short-term exposure and the related biochemical and behavioural effects.
Abstract One of the current main challenges faced by the scientific community is concerning the fate and toxicity of plastics, due to both the well-known threats made by larger plastic items spreading in ecosystems and their fragmentation into micro- and nanoparticles. Since the chemical and physical characteristics of these smaller plastic fragments are markedly different with respect to their bulk product, the potential toxicological effects in the environment need to be deeply investigated. To partially fill this gap of knowledge, the aim of this study was to evaluate the polystyrene nanobead intake in the tiss...
Source: Environmental Pollution - August 4, 2019 Category: Environmental Health Authors: Parenti CC, Ghilardi A, Della Torre C, Magni S, Del Giacco L, Binelli A Tags: Environ Pollut Source Type: research
A review on removing antibiotics and antibiotic resistance genes from wastewater by constructed wetlands: Performance and microbial response.
Abstract Pollution caused by antibiotics has been highlighted in recent decades as a worldwide environmental and health concern. Compared to traditional physical, chemical and biological treatments, constructed wetlands (CWs) have been suggested to be a cost-efficient and ecological technology for the remediation of various kinds of contaminated waters. In this review, 39 antibiotics removal-related studies conducted on 106 treatment systems from China, Spain, Canada, Portugal, etc. were summarized. Overall, the removal efficiency of CWs for antibiotics showed good performance (average value = over 50%), espec...
Source: Environmental Pollution - August 2, 2019 Category: Environmental Health Authors: Liu X, Guo X, Liu Y, Lu S, Xi B, Zhang J, Wang Z, Bi B Tags: Environ Pollut Source Type: research
Assessment of hexachlorcyclohexane biodegradation in contaminated soil by compound-specific stable isotope analysis.
Abstract Compound-specific isotope analysis (CSIA) was firstly applied to explore the biodegradation of hexachlorcyclohexane (HCH) isomers in contaminated soil. Concentrations and compound-specific carbon isotope ratio profiles of HCH in different specific ex-situ pilot-scale contaminated soil mesocosms were determined. The addition of nutrients and Sphingobium spp. significantly enhanced the degradation of HCH in contaminated soils within 90 days. Isomer specific biodegradation of HCHs was observed with α- and γ-HCH being more degradable than β and δ-HCH. Stable carbon isotope fractionation...
Source: Environmental Pollution - August 2, 2019 Category: Environmental Health Authors: Qian Y, Chen K, Liu Y, Li J Tags: Environ Pollut Source Type: research
An exploratory ecotoxicity study of primary microplastics versus aged in natural waters and wastewaters.
This study suggests that aging of microplastics in wastewaters and natural waters did not significantly enhance the toxicity to selected test species, but further studies on plants may be of interest. PMID: 31401519 [PubMed - as supplied by publisher] (Source: Environmental Pollution)
Source: Environmental Pollution - August 2, 2019 Category: Environmental Health Authors: Jemec Kokalj A, Kuehnel D, Puntar B, Žgajnar Gotvajn A, Kalčikova G Tags: Environ Pollut Source Type: research
Fate, occurrence and potential adverse effects of antimicrobials used for treatment of tuberculosis in the aquatic environment in South Africa.
Abstract The consumption of tonnes of anti-tubercular and other anti-microbial compounds for the control of the tuberculosis epidemic and other opportunistic diseases associated with human immunodeficiency virus presents tuberculosis-endemic countries such as South Africa, with a problem regarding the occurrence and fate of these compounds in the aquatic environment. The majority of these compounds are not readily degradable and could persist in the aquatic environment with potential detrimental effect on the aquatic microbiota ecosystem, development and dissemination of anti-microbial resistance as well as chroni...
Source: Environmental Pollution - August 2, 2019 Category: Environmental Health Authors: Magwira CA, Aneck-Hahn N, Taylor MB Tags: Environ Pollut Source Type: research
Vehicle emissions and fertilizer impact the leaf chemistry of urban trees in Salt Lake Valley, UT.
Abstract The urban nitrogen (N) and carbon (C) cycles are substantially influenced by human activity. Alterations to these cycles include increased inputs from fossil fuel combustion and fertilizer use. The leaf chemistry of urban trees can be used to distinguish between these different N and C sources. Here, we evaluated relationships between urban vegetation and different N and C sources in street and residential trees in the Salt Lake Valley, Utah. We tested three hypotheses: 1) unfertilized street trees on high traffic density roads will have higher leaf %N, more enriched δ15N and more depleted δ13...
Source: Environmental Pollution - August 2, 2019 Category: Environmental Health Authors: Cobley LAE, Pataki DE Tags: Environ Pollut Source Type: research
Is eating wild rainbow trout safe? The effects of different land-uses on heavy metals content in Chile.
Vargas-Chacoff L Abstract Cu, Mn, Fe, Zn, Cd and Pb levels were measured in liver and muscle samples of Rainbow Trout Oncorhynchus mykiss collected from three watersheds with different land-uses: native forest, exotic plantation, and agriculture in Chile, during January, April, July, and October 2012. Cd and Pb levels were not detected in the liver and muscle, probably since they are under the detection limits. Higher metal concentrations (liver-muscle tissues) were detected in samples from agriculture and exotic plantation streams, whereas trout from native forest streams had lower metal concentrations. Higher m...
Source: Environmental Pollution - August 2, 2019 Category: Environmental Health Authors: Barrientos C, Tapia J, Bertrán C, Peña-Cortés F, Hauenstein E, Fierro P, Vargas-Chacoff L Tags: Environ Pollut Source Type: research
Amino modification enhances reproductive toxicity of nanopolystyrene on gonad development and reproductive capacity in nematode Caenorhabditis elegans.
Abstract Although amino modified nanopolystyrene could cause toxicity on environmental organisms, the effect of amino modification on nanopolystyrene toxicity is still largely unclear. We here employed Caenorhabditis elegans as an animal model to compare the effects between pristine and amino modified nanopolystyrene particles in inducing reproductive toxicity. Nanopolystyrene (35 nm) could cause the damage on gonad development as indicated by the endpoints of number of total germline cells, length of gonad arm, and relative area of gonad arm. Nanopolystyrene exposure also reduced the reproductive capacity as re...
Source: Environmental Pollution - August 2, 2019 Category: Environmental Health Authors: Qu M, Qiu Y, Kong Y, Wang D Tags: Environ Pollut Source Type: research
Distribution, sedimentary record, and persistence of microplastics in the Pearl River catchment, China.
This study investigated sources, fate, and seasonal and spatial distribution of MPs in the main stream Pearl River and its tributaries, as well as in the Pearl River Estuary (PRE), China. MPs were widely detected in the river water, river bed sediment, and estuarine sediment, with abundances of 0.57 ± 0.71 items L-1, 685 ± 342 items kg-1 dry weight (dw), and 258 ± 133 items kg-1 dw, respectively. Sheet, fragmental, and fibrous polyethylene, polypropylene, and ethylene-propylene copolymers were predominant, suggesting that MPs in the Pearl River catchment be mainly derived from fragmentation...
Source: Environmental Pollution - June 27, 2019 Category: Environmental Health Authors: Fan Y, Zheng K, Zhu Z, Chen G, Peng X Tags: Environ Pollut Source Type: research
Early life exposure to di(2-ethylhexyl)phthalate causes age-related declines associated with insulin/IGF-1-like signaling pathway and SKN-1 in Caenorhabditis elegans.
This study utilized the nematode Caenorhabditis elegans to decipher the toxic effects of early life exposure to DEHP on aging and its underlying mechanisms. The results showed that exposure to DEHP at 0.1 and 1.5 mg/L inhibited locomotive behaviors. In addition, DEHP exposure significantly shortened the mean lifespan of the worms and further adversely affected pharyngeal pumping rate and defecation cycle in aged worms. Moreover, DEHP exposure also further enhanced accumulation of age-related biomarkers including lipofuscin, lipid peroxidation, and intracellular reactive oxygen species in aged worms. In addition, exposure...
Source: Environmental Pollution - June 27, 2019 Category: Environmental Health Authors: How CM, Yen PL, Wei CC, Li SW, Liao VH Tags: Environ Pollut Source Type: research
Genotoxic effects of 4-nonylphenol and Cyproterone Acetate on Rana catesbeiana (anura) tadpoles and juveniles.
Abstract Genotoxic analyses are commonly used in ecotoxicological studies as early biomarkers to investigate the potential effects of environmental contaminants on biological models. Several pollutants can induce DNA damage and, therefore, counting micronuclei and other nuclear abnormalities are efficient tools to evaluate genotoxicity. Some pollutants such as 4-nonylphenol (NP), a detergent used mainly in industries, and Cyproterone Acetate (CPA), an antiandrogenic medicine, have already shown genotoxic effects on some vertebrates. However, although amphibians are considered bioindicators of environmental quality...
Source: Environmental Pollution - June 27, 2019 Category: Environmental Health Authors: Gregorio LS, Franco-Belussi L, De Oliveira C Tags: Environ Pollut Source Type: research
Effect of multi-pollutant state of ozone and sulfur dioxide on atmospheric corrosivity map of Guangdong Province.
Abstract Guangdong Province, which is located in southern China, has a tropical climate with high temperatures and humidity, making it extremely unfavourable for the corrosion resistance of various materials. Meanwhile, as a quickly developing region in China, Guangdong Province is also facing multi-pollutant conditions, which seriously affect the atmospheric degradation of the materials in this region. It is therefore necessary to identify the key air pollutants that affect the atmospheric corrosivity of Guangdong Province and to propose targets of air pollutant control. An analysis of the environmental data and ...
Source: Environmental Pollution - June 27, 2019 Category: Environmental Health Authors: Huang J, Meng X, Zheng Z, Gao Y Tags: Environ Pollut Source Type: research
Occurrence and distribution of neonicotinoid insecticides in surface water and sediment of the Guangzhou section of the Pearl River, South China.
Abstract Little information is available about the occurrence of neonicotinoid insecticides in surface water and sediment of the metropolitan regions around the rivers in China. Here we investigate the residual level of neonicotinoids in the Guangzhou section of the Pearl River. At least one or two neonicotinoids was detected in each surface water and sediment, and the total amount of neonicotinoids (∑5neonics) in surface water ranged from 92.6 to 321 ng/L with a geometric mean (GM) of 174 ng/L. Imidacloprid, thiamethoxam and acetamiprid were three frequently detected neonicotinoids (100%) from surface wat...
Source: Environmental Pollution - June 27, 2019 Category: Environmental Health Authors: Yi X, Zhang C, Liu H, Wu R, Tian D, Ruan J, Zhang T, Huang M, Ying G Tags: Environ Pollut Source Type: research
Occurrence of the fungus mycotoxin, ustiloxin A, in surface waters of paddy fields in Enshi, Hubei, China, and toxicity in Tetrahymena thermophila.
Abstract There has been an increasing incidence rate of rice false smut in global rice cultivation areas. However, there is a dearth of studies on the environmental concentrations and hazards of ustiloxin A (UA), which is the major mycotoxin produced by a pathogenic fungus of the rice false smut. Here, the concentrations of UA in the surface waters of two paddy fields located in Enshi city, Hubei province, China, were measured, and its toxicity in T. Thermophila was evaluated. This is the first study to detect UA in the surface waters of the two paddy fields, and the measured mean concentrations were 2.82 and...
Source: Environmental Pollution - June 27, 2019 Category: Environmental Health Authors: Cheng S, Liu H, Sun Q, Kong R, Letcher RJ, Liu C Tags: Environ Pollut Source Type: research
Toxic responses of metabolites, organelles and gut microorganisms of Eisenia fetida in a soil with chromium contamination.
Abstract The toxic sensitivity in different physiological levels of chromium (Cr) contaminated soils with environmentally equivalent concentrations (EEC) was fully unknown. The earthworm Eisenia fetida was exposed to a Cr-contaminated soil at the EEC level (referred to as Cr-CS) to characterize the induced toxicity at the whole body, organ, tissue, subcellular structure and metabolic levels. The results showed that the survival rate, weight and biodiversity of the gut microorganisms (organ) had no significant difference (p > 0.05) between control and Cr-CS groups. Qualitative histopathological and subcellul...
Source: Environmental Pollution - June 27, 2019 Category: Environmental Health Authors: Tang R, Li X, Mo Y, Ma Y, Ding C, Wang J, Zhang T, Wang X Tags: Environ Pollut Source Type: research
Aggregation of oxidized multi-walled carbon nanotubes: Interplay of nanomaterial surface O-functional groups and solution chemistry factors.
In this study, oxidized CNT materials (O-CNTs) were prepared by treating CNT with H2O2/UV and O3 (denoting as H2O2-CNT and O3-CNT, respectively). A variety of characterizations indicated that oxygen containing groups were generated on CNT surface upon the oxidation, and the O/C ratio increased in the order of pristine CNT
Source: Environmental Pollution - June 27, 2019 Category: Environmental Health Authors: Xia T, Guo X, Lin Y, Xin B, Li S, Yan N, Zhu L Tags: Environ Pollut Source Type: research