Acesulfame and other artificial sweeteners in a wastewater treatment plant in Alberta, Canada: Occurrence, degradation, and emission
Chemosphere. 2024 Apr 4:141893. doi: 10.1016/j.chemosphere.2024.141893. Online ahead of print.ABSTRACTAcesulfame (ACE), sucralose (SUC), cyclamate (CYC), and saccharin (SAC) are widely used artificial sweeteners that undergo negligible metabolism in the human body, and thus ubiquitously exist in wastewater treatment plants (WWTPs). Due to their persistence in WWTPs, ACE and SUC are found in natural waters globally. Wastewater samples were collected from the primary influent, primary effluent, secondary effluent, and final effluent of a WWTP in Alberta, Canada between August 2022 and February 2023, and the artificial sweete...
Source: Chemosphere - April 6, 2024 Category: Chemistry Authors: Shuang Qiao Wendy Huang Darina Kuzma Aleshia Kormendi Source Type: research
Daily temperature fluctuation interacts with the mean temperature to increase the toxicity of a pyrethroid insecticide in a moth
Chemosphere. 2024 Apr 4:141888. doi: 10.1016/j.chemosphere.2024.141888. Online ahead of print.ABSTRACTClimate change complicates ecotoxicology studies because species responses to pesticides depend on temperature. Classically illustrated by the effect of constant laboratory temperatures, a recent review revealed that the toxicity of pesticides is also often increased by daily temperature fluctuations. Here, we investigated the combined effects of daily temperature fluctuation and mean temperature on the toxicity of two insecticides in the moth Spodoptera littoralis. Our study tested the toxicity of chlorpyrifos and deltame...
Source: Chemosphere - April 6, 2024 Category: Chemistry Authors: Thibaut Bagni M élissa Bouanou David Siaussat Annick Maria Annabelle Fuentes Philippe Couzi Manuel Massot Source Type: research
Biomass ash as soil fertilizers: Supercharging biomass accumulation by shifting auxin distribution
Chemosphere. 2024 Apr 4:141910. doi: 10.1016/j.chemosphere.2024.141910. Online ahead of print.ABSTRACTGrowing quantities of biomass ashes (phyto-ashs) are currently produced worldwide due to the increasing biomass consumption in energy applications. Utilization of phyto-ash in agriculture is environmentally friendly solution. However, mechanisms involving the coordination of carbon metabolism and distribution in plants and soil amendment are not well known. In the present study, tobacco plants were chemically-fertilized with or without 2‰ phyto-ash addition. The control had sole chemical fertilizer; for two phyto-ash tre...
Source: Chemosphere - April 6, 2024 Category: Chemistry Authors: Ruibao Wang Xinan ZongGuo Ripeng Hu Jian Wu Yongxian Xu Zhiyong Yu Liping Yang Guoyong Yan Jiahong Liu Yali Zhang Source Type: research
Advanced remediation in the presence of ferrous iron and carbonate-containing water by oxygen-induced oxidation of organic contaminants
Chemosphere. 2024 Apr 4:141856. doi: 10.1016/j.chemosphere.2024.141856. Online ahead of print.ABSTRACTMechanistic investigations of an environmentally friendly and easy-to-implement oxidation method in the remediation of contaminated anoxic waters, i.e. groundwater, through the sole use of oxygen for the oxygen-induced oxidation of pollutants were the focus of this work. This was achieved by the addition of O2 under anoxic conditions in the presence of ferrous iron which initiated the ferrous oxidation and the simultaneous formation of reactive •OH radicals. The involvement of inorganic ligands such as carbonates in the ...
Source: Chemosphere - April 6, 2024 Category: Chemistry Authors: Sasho Joksimoski Klaus Kerpen Ursula Telgheder Source Type: research
Competitive adsorption of heavy metals onto xanthate-modified sludge hydrochar and its solidification as secondary minerals
In this study, a sulfur-modified magnetic hydrochar was synthesized by grafting thiol-containing groups onto the sludge-derived hydrochar. The modified hydrochar exhibited effective adsorption of Cu2+, Pb2+, Zn2+, and Cd2+ over a wide pH range and in the presence of coexisting ions, and showed almost no secondary leaching in three acidic solutions. In the mult-metal ion system, the modified hydrochar exhibited maximum adsorption capacities were 39.38, 105.74, 26.53, and 38.11 mg g-1 for Cu2+, Pb2+, Zn2+, and Cd2+, respectively. However, the binding capacity and adsorption amount of modified hydrochar for metal ions were lo...
Source: Chemosphere - April 6, 2024 Category: Chemistry Authors: Chuanjin Lin Bin Dong Zuxin Xu Source Type: research
Formation of cation bridges and its promoting mechanism for sorption of sulfamethoxazole by montmorillonite
In this study, the sorption of sulfamethoxazole (SMX) on montmorillonite (MT) with the coexistence of three different valence metal cations (Na+, Ca2+, and Cr3+) was investigated. Ca2+ and Cr3+ can significantly promote the sorption of SMX on MT for about 5∼10 times promotion, respectively, while Na+ bridges displayed little effect on the sorption of SMX. The sorption binding energy of SMX with MT-Ca (-44.01 kcal/mol) and MT-Cr (-64.57 kcal/mol) bridges was significantly lower than that with MT-Na (-38.45 kcal/mol) and MT (-39.39 kcal/mol), indicating that the sorption affinity of SMX on Cr and Ca bridges was much strong...
Source: Chemosphere - April 6, 2024 Category: Chemistry Authors: Peng Yi Xiao Shu Chenhui Wang Mingfu Li Yu Huang Min Wu Lijuan Zhang Quan Chen Source Type: research
Integrative transcriptomic and metabolomic analyses reveals the toxicity and mechanistic insights of bioformulated chitosan nanoparticles against Magnaporthe oryzae
Chemosphere. 2024 Apr 4:141904. doi: 10.1016/j.chemosphere.2024.141904. Online ahead of print.ABSTRACTRice blast, an extremely destructive disease caused by the filamentous fungal pathogen Magnaporthe oryzae, poses a global threat to the production of rice (Oryza sativa L.). The emerging trend of reducing dependence on chemical fungicides for crop protection has increased interest in exploring bioformulated nanomaterials as a sustainable alternative antimicrobial strategy for effectively managing plant diseases. Herein, we used physiomorphological, transcriptomic, and metabolomic methods to investigate the toxicity and mol...
Source: Chemosphere - April 6, 2024 Category: Chemistry Authors: Rahila Hafeez Junning Guo Temoor Ahmed Ezzeldin Ibrahim Md Arshad Ali Muhammad Rizwan Munazza Ijaz Qianli An Yanli Wang Jiaoyu Wang Bin Li Source Type: research
Template-free efficacious morphology of electrosynthesized polyaniline/ β-cyclodextrin host-guest complex on Au/rGO modified electrode for removal and recovery of rare-earth and heavy elements from seawater
This study offers an influent strategy for the electrosynthesis of reduced graphene oxide/polyaniline/β-cyclodextrin (rGO/PAni/βCD) nanocomposite and its application to the removal/recovery of heavy elements (HEs) and rare-earth elements (REEs). Besides physicochemical and electrochemical studies, the surface morphological and statistical properties of fabricated nanocomposite electrode were examined. The textural and morphological characteristics of nanocomposite electrode were investigated via AFM data based on statistical, stereometric, and fractal theory. The cohesive, porous, and well-developed morphology of fabrica...
Source: Chemosphere - April 6, 2024 Category: Chemistry Authors: Fatemeh Ghamari Jaleh Ghorbani Elmira Azizi Jalal Arjomandi Hu Shi Source Type: research
Detection and characterisation of microplastics in tap water from Gauteng, South Africa
This study reports the presence, concentration, and characteristics of microplastics (MPs) in tap water in three suburbs in Gauteng Province in South Africa. Physical characterisation was conducted using stereomicroscopy and scanning electron microscopy following staining of MPs with the Rose Bengal dye. The concentrations of MPs in all samples ranged from 4.7 to 31 particles/L, with a mean of 14 ± 5.6 particles/L. Small-sized (<1 mm) and fibrous-shaped MPs were most abundant in all samples. Fibers accounted for 83.1% of MPs in samples from all the three areas, followed by fragments (12.4%), pellets/beads (3.1%), and f...
Source: Chemosphere - April 6, 2024 Category: Chemistry Authors: Gibbon Ramaremisa Hlanganani Tutu Dalia Saad Source Type: research
Sewer sediment adhesion degeneration and gelatinous biopolymer deconstruction by structural cation chelation and alkaline macromolecule hydrolysis for improving hydraulic erosion
Chemosphere. 2024 Apr 4:141902. doi: 10.1016/j.chemosphere.2024.141902. Online ahead of print.ABSTRACTSediment siltation has been regarded as the serious challenge in sewer system, which dominantly root in the gelatinous extracellular polymeric substance (EPS) structure and cohesive ability. Considering the crucial roles of divalent cation bridging and macromolecular biopolymer winding in sediment EPS formation and adhesive behavior, an innovative combination strategy of sodium pyrophosphate (SP)-mediated divalent cation chelation and alkaline biopolymer hydrolysis was developed to degenerate sediment adhesion. At the SP d...
Source: Chemosphere - April 6, 2024 Category: Chemistry Authors: Jinsuo Lu Jinxuan Liu Xingwang Li Zhiqiang Zhang Sheping Wang Heliang Pang Source Type: research
Exposure and biomonitoring of PAHs in indoor air at the urban residential area of Iran: Exposure levels and affecting factors
Chemosphere. 2024 Apr 5:141886. doi: 10.1016/j.chemosphere.2024.141886. Online ahead of print.ABSTRACTThe concentration of polycyclic aromatic hydrocarbons (PAHs) in the air inside residential houses in Iran along with measuring the amount of 1-OHpyrene metabolite in the urine of the participants in the study was investigated by gas chromatography-mass spectrometry (GC-MS). Demographic characteristics (including age, gender, and body composition), equipment affecting air quality, and wealth index were also investigated. The mean ± standard error (SE) concentration of particulate matter 10 (PM10) and ∑PAHs in the indoor ...
Source: Chemosphere - April 6, 2024 Category: Chemistry Authors: Zahra Soleimani Rosa Haghshenas Yousef Farzi Ali Taherkhani Kazem Naddafi Amirali Hajebi Amir Hossein Behnoush Amirmohammad Khalaji Saham Mirzaei Maryam Keyvani Shahedeh Saeify Rayhaneh Kalanter Masud Yunesian Alireza Mesdaghina Farshad Farzadfar Source Type: research
Chemical composition and source apportionment of ambient PM2.5 in a coastal urban area, Northern Poland
This study examines the mass concentrations of fine mode (PM2.5) aerosol and its major and trace components (Al, As, Ba, Bi, Ca, Cd, Co, Cr, Cu, Fe, K, Mg, Mo, Mn, Na, Ni, Pb, Sb, Se, Sr, Te, Ti, Tl, V, Zn). The comprehensive field measurements were conducted in Poland between September 2019 and May 2020. Seasonal distribution and drivers of these pollutants showed considerable variability. In winter, higher concentrations were observed for Pb, Co, and As due to the higher contribution of pyrogenic emission. The Principal Component Analysis provided evidence of anthropogenic sources of trace species associated with coal co...
Source: Chemosphere - April 6, 2024 Category: Chemistry Authors: Patrycja Siudek Source Type: research
Efficient electrochemical degradation of ceftazidime by Ti < sup > 3+ < /sup > self-doping TiO < sub > 2 < /sub > nanotube-based Sb-SnO < sub > 2 < /sub > nanoflowers as an intermediate layer on a modified PbO < sub > 2 < /sub > electrode
Chemosphere. 2024 Apr 4:141853. doi: 10.1016/j.chemosphere.2024.141853. Online ahead of print.ABSTRACTCeftazidime (CAZ) is an emerging organic pollutant with a long-lasting presence in the environment. Although some PbO2 materials exhibit degradation capabilities, inefficient electron transport in the substrate layer and the problem of electrode stability still limit their use. Here, an interfacial design in which TiO2 nanotube arrays generate Ti3+ self-doping oxide substrate layers and highly active 3D Sb-SnO2 nanoflowers-like interlayers was used to prepare PbO2 anodes for efficient degradation of CAZ. Interestingly, aft...
Source: Chemosphere - April 6, 2024 Category: Chemistry Authors: Jian Wang Xiaoxiao Duan Yongsheng Ren Source Type: research
Impact of different sterilisation techniques on sorption and NER formation of test chemicals in soil
In this study, experiments in accordance with OECD 307 and OECD 106 guidelines were performed with two soils covering wide range of soil characteristics and treated with the three sterilisation techniques autoclaving, gamma(γ)-radiation and adding 1% (w/w) sodium azide. As a test item, 14C-labelled phenanthrene and bromoxynil was used for OECD 307 test, whereas non-labelled phenanthrene and atrazine was used for OECD 106. The sterilisation efficiencies were investigated using traditional viable plate count and molecular approaches (RNA extraction method). The results suggest that none of the tested techniques resulted in ...
Source: Chemosphere - April 6, 2024 Category: Chemistry Authors: Rebecca S üßmuth Prasit Shrestha Cecilia Andrea Diaz Navarrete Franziska-Frederike Wege Christine Achten Dieter Hennecke Source Type: research
Feasibility evaluation of near dissolved organic matter microfiltration (NDOM MF) for the efficient removal of microplastics in the water treatment process
Chemosphere. 2024 Apr 4:141882. doi: 10.1016/j.chemosphere.2024.141882. Online ahead of print.ABSTRACTMicrofiltration (MF) using membranes with a mean pore size smaller than 0.45 μm has generally been used for particle removal from water, given that materials larger and smaller than 0.45 μm are regarded as particulates and dissolved organic matter (DOM), respectively. It is also the case for removing small-size microplastics (MPs). However, given their sizes (ca. 1 μm), there is room for further improvement of the productivity (i.e., water flux) in the pore size range of 0.45-1 μm on the condition that the removal rate...
Source: Chemosphere - April 6, 2024 Category: Chemistry Authors: Uje Lee Kyeongyeon Park Seungwon Chang Min Cho Jaewoo Lee Source Type: research
