Catalytic steam gasification of food waste using Ni-loaded rice husk derived biochar for hydrogen production
This study reports an environmentally friendly FW disposal method in the form of catalytic steam gasification using various types of Ni-loaded chars (untreated char, steam-treated char, and ZnCl2-treated char). The results were also compared with the gasification results from the Ni catalysts supported on commercial α-alumina (Ni/α-Al2O3). The Ni/steam-treated char showed the maximum hydrogen generation (0.471 mol/(g feedstock•g cat)) because of the high reducibility, high nickel dispersion, large amount of inherent K and Ca, and moderate surface area. The overall gas and H2 yield were observed in the foll...
Source: Chemosphere - June 24, 2021 Category: Chemistry Authors: Abid Farooq Seong-Ho Jang See Hoon Lee Sang-Chul Jung Gwang Hoon Rhee Byong-Hun Jeon Young-Kwon Park Source Type: research

Algae-mediated processes for the treatment of antiretroviral drugs in wastewater: Prospects and challenges
Chemosphere. 2021 Oct;280:130674. doi: 10.1016/j.chemosphere.2021.130674. Epub 2021 Apr 27.ABSTRACTThe prevalence of pharmaceuticals (PCs), especially antiretroviral (ARV) drugs in various aquatic ecosystems has been expansively reported, wherein wastewater treatment plants (WWTPs) are identified as the primary point source. Consequently, the occurrence, ecotoxicity and treatment of ARV drugs in WWTPs have drawn much attention in recent years. Numerous studies have shown that the widely employed activated sludge-based WWTPs are incapable of removing ARV drugs efficiently from wastewater. Recently, algae-based wastewater tr...
Source: Chemosphere - June 24, 2021 Category: Chemistry Authors: Karen Reddy Nirmal Renuka Sheena Kumari Faizal Bux Source Type: research

Study on the treatment of Cu < sup > 2+ < /sup > -organic compound wastewater by electro-Fenton coupled pulsed AC coagulation
In this study, the removal efficiency (Re), electrical energy consumption (EEC) and removal mechanism of Cu2+-organic were analyzed and the optimal operation parameters were determined. SEM, EDS, XRD and FTIR were used to characterize the morphology, elemental composition, crystal structure, function groups of sludge produced in the EF-PACC. UV, ESR and GC-MS were employed to determine concentration of organic matter, existence of OH, middle products of decomposed organic matter in EF-PACC, respectively. The results show that under the optimal conditions of initial pH = 2.5, current density (j) = 2 A/m2, initial c(Cu2+) = ...
Source: Chemosphere - June 24, 2021 Category: Chemistry Authors: Tao Xu Xiaotong Zheng Yihui Zhou Chunyou Zhu Bonian Hu Xiping Lei Xueyuan Zhang Gang Yu Source Type: research

Biomass and salt-dependent effects of Bacillus spores on radionuclide migration from the Waste Isolation Pilot Plant
Chemosphere. 2021 Oct;280:130680. doi: 10.1016/j.chemosphere.2021.130680. Epub 2021 May 5.ABSTRACTSpores of a Bacillus sp., isolated from radioactive waste, were tested for their ability to influence the fate and transport of neodymium (Nd3+) under high salt conditions expected at the Waste Isolation Pilot Plant (WIPP) nuclear waste repository. Spores were suspended in neodymium-spiked saline solutions up to 4 M NaCl, and concentrations of Nd and the complexing agent dipicolinic acid (DPA), a component of spores, were monitored along with optical densities and spore numbers. Results support neodymium bioassociation that is...
Source: Chemosphere - June 24, 2021 Category: Chemistry Authors: Juliet Swanson Adrianne Navarrette Cindi Hazelton Michael Richmann Floyd Stanley Source Type: research

Effect of various ligands on the selective precipitation of critical and rare earth elements from acid mine drainage
Chemosphere. 2021 Oct;280:130684. doi: 10.1016/j.chemosphere.2021.130684. Epub 2021 May 7.ABSTRACTAcid mine drainage (AMD) has been of environmental concern for decades but recently found to be a viable source of critical elements including rare earth elements (REEs). Recovery of these elements while treating AMD for environmental compliance improves the sustainability of the treatment process. The precipitation behavior of the REEs and other cations during the AMD neutralization process depends strongly on the solution chemistry, available ligands, and concentration of elements. Several chemicals were used to study the ef...
Source: Chemosphere - June 24, 2021 Category: Chemistry Authors: Behzad Vaziri Hassas Mohammad Rezaee Sarma V Pisupati Source Type: research

Plants exert beneficial influence on soil microbiome in a HCH contaminated soil revealing advantage of microbe-assisted plant-based HCH remediation of a dumpsite
This study advocates microbe-assisted plant-based bioremediation strategy to remediate HCH contamination.PMID:34162081 | DOI:10.1016/j.chemosphere.2021.130690 (Source: Chemosphere)
Source: Chemosphere - June 24, 2021 Category: Chemistry Authors: Ispreet Kaur Vivek Kumar Gaur Raj Kumar Regar Aditi Roy Pankaj Kumar Srivastava Rajeev Gaur Natesan Manickam Saroj Kanta Barik Source Type: research

Gas-phase and aqueous-surface reaction mechanism of Criegee radicals with serine and nucleation of products: A theoretical study
This study investigated the reaction of CIs with serine (Ser) in the gas phase by using density functional theory (DFT) calculations and at the gas-liquid interface by using Born-Oppenheimer molecular dynamics (BOMD). The results reveal that the reactivity of the three functional groups of Ser can be ordered as follows: COOH> NH2> OH. Water-mediated reactions of CIs with NH2 and OH groups of Ser on the droplet follow the proton exchange mechanism. The products, sulfuric acids, ammonia, and water molecules form stable clusters within 20 ns. This study shows that hydroperoxide products can contribute to new particle fo...
Source: Chemosphere - June 24, 2021 Category: Chemistry Authors: Lei Li Ruiying Zhang Xiaohui Ma Yuanyuan Wei Xianwei Zhao Ruiming Zhang Fei Xu Yanwei Li Xinxi Huo Qingzhu Zhang Wenxing Wang Source Type: research

Intestinal toxicity and microbial community disorder induced by bisphenol F and bisphenol S in zebrafish
Chemosphere. 2021 Oct;280:130711. doi: 10.1016/j.chemosphere.2021.130711. Epub 2021 Apr 30.ABSTRACTThe intestine is the important bioaccumulation and target organ of Bisphenol F (BPF) and Bisphenol S (BPS). Morphological and functional abnormalities induced by BPS and BPF exposure in zebrafish intestine have been reported. However, the underlying mechanisms are not well understood, and the combined toxicities of BPS and BPF in the intestine have not been studied. Here, the zebrafish were treated by single and combined exposure of BPF and BPS at 1, 10, 100, 1000 μg/L. Oxidative damage, inflammation, and transcriptome pro...
Source: Chemosphere - June 24, 2021 Category: Chemistry Authors: Yonghua Wang Beibei Wang Qianqian Wang Yuxuan Liu Xiaodan Liu Bing Wu Guanghua Lu Source Type: research

Application of biomass derived products in mid-size automotive industries: A review
Chemosphere. 2021 Oct;280:130723. doi: 10.1016/j.chemosphere.2021.130723. Epub 2021 May 4.ABSTRACTThe automotive industry is directly affected by the shortage of fossil fuels and the excessive pollution resulting from crude oil-based fuels has many adverse effects on the environment. The search for a greener and sustainable source of materials and fuels to power automobiles has ultimately led to the usage of biomass and biobased sources as the main precursor due to its graft availability and renewability. Biobased fuels developed have been shown to easily blend in with the existing automobile engines and to provide sustain...
Source: Chemosphere - June 24, 2021 Category: Chemistry Authors: S M Prasanth P Senthil Kumar S Harish M Rishikesh Sonil Nanda Dai-Viet N Vo Source Type: research

Effect of using Celosia argentea grown from seeds treated with a magnetic field to conduct Cd phytoremediation in drought stress conditions
Chemosphere. 2021 Oct;280:130724. doi: 10.1016/j.chemosphere.2021.130724. Epub 2021 May 3.ABSTRACTThe mechanisms of the stimulatory effect of external magnetic fields on plant growth have been revealed; however, the role of magnetic fields in the efficiency of phytoremediation with Celosia argentea grown under drought stress which results in detrimental influences on food security has not been reported. Therefore, this study evaluated the physiological responses of C. argentea to the interactions between exposure to a magnetic field and drought stress. Compared with a control, a drought treatment negatively affected the dr...
Source: Chemosphere - June 24, 2021 Category: Chemistry Authors: Pan Yang Tian Gan Wen Pi Min Cao Dan Chen Jie Luo Source Type: research

The prospective effects of long-term exposure to ambient PM < sub > 2.5 < /sub > and constituents on mortality in rural East China
Chemosphere. 2021 Oct;280:130740. doi: 10.1016/j.chemosphere.2021.130740. Epub 2021 May 4.ABSTRACTFew cohort studies explored the associations of long-term exposure to ambient fine particulate matter with an aerodynamic diameter of 2.5 μm or less (PM2.5) and its chemical constituents with mortality risk in rural China. We conducted a 12-year prospective study of 28,793 adults in rural Deqing, China from 2006 to 2018. Annual mean PM2.5 and its constituents, including black carbon (BC), organic carbon (OC), ammonium (NH4+), nitrate (NO3-), sulfate (SO42-), and soil dust were measured at participants' addresses at enrollme...
Source: Chemosphere - June 24, 2021 Category: Chemistry Authors: Yun Chen Renjie Chen Yue Chen Xiaolian Dong Jianfu Zhu Cong Liu Aaron van Donkelaar Randall V Martin Huichu Li Haidong Kan Qingwu Jiang Chaowei Fu Source Type: research

Advances in metal(loid) oxyanion removal by zerovalent iron: Kinetics, pathways, and mechanisms
Chemosphere. 2021 Oct;280:130766. doi: 10.1016/j.chemosphere.2021.130766. Epub 2021 May 3.ABSTRACTMetal(loid) oxyanions in groundwater, surface water, and wastewater can have harmful effects on human or ecological health due to their high toxicity, mobility, and lack of degradation. In recent years, the removal of metal(loid) oxyanions using zerovalent iron (ZVI) has been the subject of many studies, but the full scope of this literature has not been systematically reviewed. The main elements that form metal(loid) oxyanions under environmental conditions are Cr(VI), As(V and III), Sb(V and III), Tc(VII), Re(VII), Mo(VI), V...
Source: Chemosphere - June 24, 2021 Category: Chemistry Authors: Xiao Wang Yue Zhang Zhiwei Wang Chunhua Xu Paul G Tratnyek Source Type: research

Individual and synergistic toxic effects of carbendazim and chlorpyrifos on zebrafish embryonic development
In this study, we examined the separate and combined effects of these compounds on zebrafish embryonic development. The LC50 values for carbendazim and chlorpyrifos at 96 h post-fertilization (hpf) were 0.89 mg/L and 3.83 mg/L, respectively. Carbendazim dose-dependently increased the spontaneous tail-wagging frequency of 24 hpf embryos, the hatching rate of 48 hpf embryos, and the mortality and deformity rate of 96 hpf embryos, while chlorpyrifos increased the heart rate of 48 hpf embryos as well as the mortality and deformity rate of 96 hpf embryos. Mixed exposure at an equipotent concentration ratio (Mix1) and at the rat...
Source: Chemosphere - June 24, 2021 Category: Chemistry Authors: Ruiqi Fan Wanjun Zhang Lizhong Li Li Jia Jun Zhao Zengming Zhao Shuangqing Peng Xiaoyan Yuan Yiqiang Chen Source Type: research

Multigenerational graphene oxide intoxication results in reproduction disorders at the molecular level of vitellogenin protein expression in Acheta domesticus
In this study, we used a promising model organism, Acheta domesticus, which was intoxicated with GO in food for three generations. The aim of the study was to investigate the process of Vg synthesis in crickets depending on the exposure time, GO concentration, and age of the females. The results revealed that chronic GO intoxication had adverse effects on the Vg expression pattern. The 1st generation of insects showing low Vg expression was most affected. The 2nd generation of A. domesticus presented a high Vg expression. The last investigated generation seemed to cope with stress caused by GO, and the Vg expression was ba...
Source: Chemosphere - June 24, 2021 Category: Chemistry Authors: Barbara Flasz Marta Dziewi ęcka Andrzej K ędziorski Monika Tarnawska Maria Augustyniak Source Type: research

Degradation of high concentration starch and biocathode autotrophic denitrification using photo microbial fuel cell
Chemosphere. 2021 Oct;280:130776. doi: 10.1016/j.chemosphere.2021.130776. Epub 2021 May 3.ABSTRACTIn the study, a dual-chamber photo MFC was constructed with a photosynthetic bacteria consortium PB-Z and a heterotrophic nitrifier C16 as anode and cathode inoculant, respectively. The electron released from starch degradation in the anode by photosynthetic bacteria was transferred to the cathode, which was utilized by the nitrifying bacteria C16 to realize autotrophic denitrification. Lower resistance was more conducive to the electron transfer and pollutants removal. Comparing with natural light, continuous light greatly pr...
Source: Chemosphere - June 24, 2021 Category: Chemistry Authors: Yuxiang Liu Shaojie Pang Tao Liang Ruipeng Ren Yongkang Lv Source Type: research

Electro-reversible adsorption as a versatile tool for the removal of diclofenac from wastewater
In this study, adsorption of a non-steroidal anti-inflammatory drug such as Diclofenac (DCF) on a commercial carbonaceous aerogel honeycomb monolith (NANOLIT®-NQ40) was ascertained. Based on, the overall design of an adsorption treatment should include a feasible regeneration process for the spent adsorbent. In this work, the adsorption/desorption process was ameliorated by coupling of electrochemical technology (anodic/cathodic polarisation). It was determined that the anodic polarisation enhanced the DCF removal and it was related with the applied voltage and the disposition of the electrodes into the bulk solution. ...
Source: Chemosphere - June 24, 2021 Category: Chemistry Authors: Ant ón Puga Marta Pazos Emilio Rosales M Angeles Sanrom án Source Type: research

A novel oleaginous yeast Saccharomyces cerevisiae CU-TPD4 for lipid and biodiesel production
This study reports on the novel Saccharomyces cerevisiae CU-TPD4 that was isolated from coconut waste residues obtained from a coconut factory in Thailand. The CU-TPD4 isolate was confirmed to be a S. cerevisiae by molecular analysis and to be an oleaginous yeast with more than 20% (w/w) of the cell dry weight (CDW) present in the form of lipids. The lipid content and lipid yield of CU-TPD4 (52.96 ± 1.15% of CDW and 1.78 ± 0.06 g/L, respectively) under optimized growth conditions were much higher than those under normal growth conditions (22.65 ± 1.32% of CDW and 1.24 ± 0.12 g/L, respectively). ...
Source: Chemosphere - June 24, 2021 Category: Chemistry Authors: Wannapawn Watsuntorn Nuttha Chuengcharoenphanich Poompat Niltaya Cheryanus Butkumchote Monnat Theerachat Chompunuch Glinwong Wei Qi Zhongming Wang Warawut Chulalaksananukul Source Type: research

Detection and remediation of pollutants to maintain ecosustainability employing nanotechnology: A review
This article highlight the challenges associated with various conventional techniques such as filtration, absorption, flocculation, coagulation, chromatographic and mass spectroscopic techniques. Environmental nanotechnology has provided an innovative frontier to combat the aforesaid issues of sustainable environment by reducing the non-requisite use of raw materials, electricity, excessive use of agrochemicals and release of industrial effluents into water bodies. Various nanotechnology based approaches including surface enhance scattering, surface plasmon resonance; and distinct types of nanoparticles like silver, silico...
Source: Chemosphere - June 24, 2021 Category: Chemistry Authors: Neelam Yadav Vinod Kumar Garg Anil Kumar Chhillar Jogender Singh Rana Source Type: research

Biostimulation is a valuable tool to assess pesticide biodegradation capacity of groundwater microorganisms
Chemosphere. 2021 Oct;280:130793. doi: 10.1016/j.chemosphere.2021.130793. Epub 2021 May 6.ABSTRACTGroundwater is the main source for drinking water production globally. Groundwater unfortunately can contain micropollutants (MPs) such as pesticides and/or pesticide metabolites. Biological remediation of MPs in groundwater requires an understanding of natural biodegradation capacity and the conditions required to stimulate biodegradation activity. Thus, biostimulation experiments are a valuable tool to assess pesticide biodegradation capacity of field microorganisms. To this end, groundwater samples were collected at a drink...
Source: Chemosphere - June 24, 2021 Category: Chemistry Authors: Andrea Aldas-Vargas Thomas van der Vooren Huub H M Rijnaarts Nora B Sutton Source Type: research

Phosphate removal from aqueous solution by electrochemical coupling siderite packed column
Chemosphere. 2021 Oct;280:130805. doi: 10.1016/j.chemosphere.2021.130805. Epub 2021 May 6.ABSTRACTThe use of iron species to remove PO43- is widely used, and the fresh Fe3+ produced in situ demonstrate better effect on the removal of PO43- in many researches. Therefore, in order to develop a simpler and more efficient method for PO43- removal, we designed an easy operation by electrochemically dissolving siderite to produce fresh Fe3+ in situ for PO43- removal from wastewater. Results showed that current intensity at 20 mA, initial pH at 6, initial PO43- concentration at 1 mM and influent flow rate at 2.5 mL min-1 were the...
Source: Chemosphere - June 24, 2021 Category: Chemistry Authors: Mengfei Chen Xuewei Li Qiwu Zhang Chao Wang Huimin Hu Qian Wang Chaocheng Zeng Source Type: research

Global transcriptome profiling reveals antagonizing response of head kidney of juvenile common carp exposed to glyphosate
This study casts new understanding into the risk of GLY in aquatic animals.PMID:34162096 | DOI:10.1016/j.chemosphere.2021.130823 (Source: Chemosphere)
Source: Chemosphere - June 24, 2021 Category: Chemistry Authors: Jing-Bo Liu Kai Chen Tian-Bin Liu Zhen-Yong Wang Lin Wang Source Type: research

Crop straw-derived biochar alleviated cadmium and copper phytotoxicity by reducing bioavailability and accumulation in a field experiment of rice-rape-corn rotation system
Chemosphere. 2021 Oct;280:130830. doi: 10.1016/j.chemosphere.2021.130830. Epub 2021 May 18.ABSTRACTBiochar has the potential to control the bioavailability and transformation of heavy metals in soil, thereby ensuring the safe crop production. A three seasons field experiment was conducted to investigate the effect of crop straw-derived biochar on the bioavailability and crop accumulation of Cd and Cu in contaminated soil. Wheat straw biochar (WSB), corn stalk biochar (CSB), and rice husk biochar (RHB) were applied at the rate of 0, 1.125, and 2.25 × 104 kg ha-1, respectively. The results showed that all types of bioc...
Source: Chemosphere - June 24, 2021 Category: Chemistry Authors: Yutong Zong Qing Xiao Zaffar Malik Yuan Su Yefeng Wang Shenggao Lu Source Type: research

An association between PM < sub > 2.5 < /sub > and pediatric respiratory outpatient visits in four Chinese cities
CONCLUSIONS: Our study showed that exposure to the ambient PM2.5 was associated with the increase of the number of outpatient visits with pediatric respiratory diseases in four Chinese cities. The health effects of PM2.5 may not be independent of other air pollutants and could be modified by temperature.PMID:34162098 | DOI:10.1016/j.chemosphere.2021.130843 (Source: Chemosphere)
Source: Chemosphere - June 24, 2021 Category: Chemistry Authors: Yawei Li Chengcheng Li Jingyi Liu Congshen Meng Chunyu Xu Zhe Liu Qin Wang Yue Liu Jingxiu Han Dongqun Xu Source Type: research

Investigation of bromide removal and bromate minimization of membrane capacitive deionization for drinking water treatment
Chemosphere. 2021 Oct;280:130857. doi: 10.1016/j.chemosphere.2021.130857. Epub 2021 May 13.ABSTRACTThe ubiquitous bromide (Br-) poses a challenge to current drinking water treatment schemes due to the formation of brominated disinfection by-products, especially bromate (BrO3-). A cost-effective and energy-efficient technology to remove Br- before disinfection is highly desired. In this work, the application of membrane capacitive deionization (MCDI) for the removal of Br- and BrO3- minimization for drinking water treatment was systematically investigated. Results showed that the removal of Br- by MCDI followed the pseudo-s...
Source: Chemosphere - June 24, 2021 Category: Chemistry Authors: Yang Li Junsheng Wu Tianzhi Yong Yingxiang Fei Junwen Qi Source Type: research

Effects of extracellular polymeric substances on silver nanoparticle bioaccumulation and toxicity to Triticum aestivum L
Chemosphere. 2021 Oct;280:130863. doi: 10.1016/j.chemosphere.2021.130863. Epub 2021 May 18.ABSTRACTThe potential effects of extracellular polymeric substances (EPS) on the behavior and toxicity of silver nanoparticle (Ag-NPs) and silver sulfide nanoparticle (Ag2S-NPs) remains ambiguous. The interaction of EPS from Bacillus subtilis with Ag2S-NPs, metallic Ag-NPs, or ionic Ag, and the associated plant safety had been examined in this study. The biological impacts of Ag-NPs and Ag2S-NPs were Ag form-dependent and highly influenced by microbial EPS. Compared with metallic Ag-NPs, Ag2S-NPs exert inert biological impacts, as re...
Source: Chemosphere - June 24, 2021 Category: Chemistry Authors: Qing-Long Fu Chun-Jie Zhong Ting Qing Zi-Yan Du Cheng-Cheng- Li Jun-Jie Fei Willie J G M Peijnenburg Source Type: research

Removal of pharmaceuticals from nitrified urine
This study concludes that GAC is able to remove the targeted xenobiotics without affecting the concentration of N and P in the urine, suggesting that nitrified urine could be safely used as a nutrient product in future.PMID:34162101 | DOI:10.1016/j.chemosphere.2021.130870 (Source: Chemosphere)
Source: Chemosphere - June 24, 2021 Category: Chemistry Authors: Abdulaziz Almuntashiri Ahmad Hosseinzadeh Federico Volpin Syed Muztuza Ali Ugyen Dorji Hokyong Shon Sherub Phuntsho Source Type: research

A mild and one-pot method to activate lignin-derived biomass by using boric acid for aqueous tetracycline antibiotics removal in water
Chemosphere. 2021 Oct;280:130877. doi: 10.1016/j.chemosphere.2021.130877. Epub 2021 May 15.ABSTRACTA mild and one-pot activation approach of activated carbon was found. The feasibility of boric acid as the activated reagent which was used for the adsorption of four tetracyclines antibiotics (TCs) in water. Boric acid activated carbon (BAC) from bioresource has a much higher removal efficiency than currently reported biochar. The maximum adsorption capacity of BAC is 173.9 mg/g for TCs. BAC is an ecofriendly, nontoxic, and low-cost absorbent from sawdust waste. BAC and TCs could keep coalescing at least 55 days on the surfa...
Source: Chemosphere - June 24, 2021 Category: Chemistry Authors: Meng Yuan Changsheng Li Bingjie Zhang Jianli Wang Jianhui Zhu Jiawen Ji Yongqiang Ma Source Type: research

Indium recovery from spent liquid crystal displays by using hydrometallurgical methods and microwave pyrolysis
Chemosphere. 2021 Oct;280:130905. doi: 10.1016/j.chemosphere.2021.130905. Epub 2021 May 17.ABSTRACTIndium recovery from spent liquid crystal displays (LCDs) of monitors was studied by using microwave pyrolysis as a pretreatment step prior to hydrometallurgical processes including acid leaching, solvent extraction, and stripping. After microwave pyrolysis at 150 W for a processing time of 50 min, the hydrometallurgical processes were carried out to sequentially solubilize and increase the purity of indium ions in the product solution. The leaching efficiency of indium was approximately 98% when using 0.5 M of sulfuric acid ...
Source: Chemosphere - June 24, 2021 Category: Chemistry Authors: Yu-Fong Huang Sheng-Yuan Wang Shang-Lien Lo Source Type: research

An overview on non-spherical semiconductors for heterogeneous photocatalytic degradation of organic water contaminants
Chemosphere. 2021 Oct;280:130907. doi: 10.1016/j.chemosphere.2021.130907. Epub 2021 May 18.ABSTRACTBecause of their carcinogenicity and mutagenicity, the elimination of organic contaminants from surface and subsurface water is a subject of environmental significance. Conventional water decontamination approaches such as membrane separation, ultrafiltration, adsorption, reverse osmosis, coagulation, etc., have relatively higher operating costs and can generate highly toxic secondary contaminants. On the other hand, heterogeneous photocatalysis, an advanced oxidation process (AOP), is considered a clean and cost-effective pr...
Source: Chemosphere - June 24, 2021 Category: Chemistry Authors: Ehsan Nazarzadeh Zare Sidra Iftekhar Yuri Park Jessy Joseph Varsha Srivastava Moonis Ali Khan Pooyan Makvandi Mika Sillanpaa Rajender S Varma Source Type: research

Organic carbon quantity and quality jointly triggered the switch between dissimilatory nitrate reduction to ammonium (DNRA) and denitrification in biofilters
Chemosphere. 2021 Oct;280:130917. doi: 10.1016/j.chemosphere.2021.130917. Epub 2021 May 17.ABSTRACTThe effect of organic carbon (OC) quality and quantity on switch between dissimilatory nitrate reduction to ammonium (DNRA) and denitrification (DEN) was studied in biofilter systems. High OC in matrix could promote significantly nitrate (NO3--N) removal due to the reinforce of DEN. Sodium acetate (SA) addition in influent further fueled NO3--N removal in groups with low OC in matrix but increased ammonium (NH4+-N) and nitrite (NO2--N) accumulation in groups with high OC in matrix. This indicated that high OC combined differe...
Source: Chemosphere - June 24, 2021 Category: Chemistry Authors: Feng Sun Qinghui Deng Xiaowen Li Mengjuan Tang Xufa Ma Xiuyun Cao Yiyong Zhou Chunlei Song Source Type: research

Synergy of production of value-added bioplastic, astaxanthin and phycobilin co-products and Direct Green 6 textile dye remediation in Spirulina platensis
Chemosphere. 2021 Oct;280:130920. doi: 10.1016/j.chemosphere.2021.130920. Epub 2021 May 21.ABSTRACTPhyco-remediation of dyestuffs in textile wastewaters is of economic, industrial, and environmental importance. We evaluated the remediation of the textile dye, Direct Green 6 (DG6), by Spirulina platensis, and investigated the novel possibility that DG6 treatment enhances production of the biopolymer, polyhydroxybutyrate (PHB). We showed that both live and dead cells of Spirulina were capable of DG6 remediation, but live cells could be re-used with no loss of remediation efficiency. Furthermore, DG6 remediation by live cells...
Source: Chemosphere - June 24, 2021 Category: Chemistry Authors: Zahra Moradi Maryam Madadkar Haghjou Mahmoud Zarei Louise Colville Ali Raza Source Type: research

Evolution of fusion and PCDD/F-signatures of boiler ash from a mechanical grate municipal solid waste incinerator
Chemosphere. 2021 Oct;280:130922. doi: 10.1016/j.chemosphere.2021.130922. Epub 2021 May 20.ABSTRACTBoiler ash formed at different temperature ranges in a typical mechanical grate incinerator is collected and systemically studied, with the aim of providing a reference for ash disposal and revealing the formation routes and distribution of polychlorinated ρ-dibenzodioxins and dibenzofurans (PCDD/Fs). Key physical and chemical properties are carefully analyzed, including chemical component, ash fusion temperatures (AFTs), crystalline phases, chemical species, and PCDD/Fs. Several fouling and slagging indices are introduce...
Source: Chemosphere - June 24, 2021 Category: Chemistry Authors: Yunfeng Ma Xiaoqing Lin Xiaodong Li Jianhua Yan Source Type: research

Enhanced removal of oxytetracycline antibiotics from water using manganese dioxide impregnated hydrogel composite: Adsorption behavior and oxidative degradation pathways
Chemosphere. 2021 Oct;280:130926. doi: 10.1016/j.chemosphere.2021.130926. Epub 2021 May 21.ABSTRACTThe present work provides the first attempt of using manganese dioxide loaded poly(sodium acrylate) hydrogel (MnO2@PSA) to address potential threats posed by oxytetracycline (OTC) antibiotics in aqueous environment. The MnO2@PSA was prepared via a facile approach and demonstrated enhanced removal performance even under extremely high concentrations of OTC. The outstanding performance exhibited by MnO2@PSA was attributed to synergetic effects of adsorption oxidative degradation. The synthesized composite was characterized eval...
Source: Chemosphere - June 24, 2021 Category: Chemistry Authors: Mengist Minale Awoke Guadie Yuan Li Yuan Meng Xuejiang Wang Jianfu Zhao Source Type: research

Substrate competition and microbial function in sulfate-reducing internal circulation anaerobic reactor in the presence of nitrate
In this study, an internal circulation anaerobic reactor was conducted to investigate the impact of nitrate on sulfate reduction. The results showed that sulfate reduction rate dropped from 78.4% to 41.4% at NO3- /SO42- ratios ranging from 0 to 1.03, largely attributed to the inactivity of acetate-utilizing sulfate-reducing bacteria (SRB) and preferential usage of nitrate of propionate-utilizing SRB. Meanwhile, high nitrate removal efficiency was maintained and COD removal efficiency increased with nitrate addition. Enhancement of propionate and butyrate degradation based on Modified Gompertz model and Phylogenetic Investi...
Source: Chemosphere - June 24, 2021 Category: Chemistry Authors: Min-Hui Cai Gan Luo Jun Li Wen-Tao Li Yan Li Ai-Min Li Source Type: research

Synergistic pretreatment of CaO and freezing/thawing to enhance volatile fatty acids recycling and dewaterability of waste activated sludge via anaerobic fermentation
Chemosphere. 2021 Oct;280:130939. doi: 10.1016/j.chemosphere.2021.130939. Epub 2021 May 21.ABSTRACTTo avoid the generally deteriorated dewaterability of sludge in waste activated sludge (WAS) anaerobic acidogenesis, the combination of varied calcium oxide (CaO) dosage (i.e., 0.01-0.07 g/g TS) and freezing/thawing pretreatment (5 F/T cycles) was investigated for concurrently improving the production of volatile fatty acids (VFAs) and dewatering performance of sludge. The highest release of soluble chemical oxygen demand (SCOD) (1836 ± 96 mg/L) and accumulation of VFAs (448.0 mg COD/g VS) were reached through the co-p...
Source: Chemosphere - June 24, 2021 Category: Chemistry Authors: Yuecheng She Wenxuan Wei Xiaohuan Ai Junming Hong Xiaodong Xin Source Type: research

Impact of chloride ions on activated persulfates based advanced oxidation process (AOPs): A mini review
Chemosphere. 2021 Oct;280:130949. doi: 10.1016/j.chemosphere.2021.130949. Epub 2021 May 21.ABSTRACTChloride ion (Cl-) is ever-present in aquatic environments. Different Cl- concentration have been reported in industrial water (760 mM), surface water (
Source: Chemosphere - June 24, 2021 Category: Chemistry Authors: Daniel T Oyekunle Jiayi Cai Eman A Gendy Zhuqi Chen Source Type: research

Multi-element signatures in solid and solution phases in a tropical mixing zone: A case study in the Cai River estuary, Vietnam
This study provides baseline concentrations of major, trace, and rare earth elements (REEs) in the solid and solution phases of the tropical Cai River estuary under influence of multiple stresses. The application of the selected multivariate analysis tools (principal component analysis and redundancy analysis) to the enrichment factor and partitioning coefficients (KSPM/Water and KSPM/Sed) calculated from the bulk element contents highlighted the strongest relationships (considered as multi-element signatures) according to the efficiency of the transfer across the estuarine gradients (considered as a selective geochemical ...
Source: Chemosphere - June 24, 2021 Category: Chemistry Authors: Sofia E Koukina Nikolay V Lobus Alexander V Shatravin Source Type: research

Control of disinfection byproducts in drinking water treatment plants: Insight into activated carbon filter
Chemosphere. 2021 Oct;280:130958. doi: 10.1016/j.chemosphere.2021.130958. Epub 2021 May 21.ABSTRACTThe removal efficiencies of disinfection byproducts formation potentials (DBPFPs) and generated DBPs under pre-chlorination condition (pre-generated DBPs) during different drinking water treatment trains in eight full-scale drinking water treatment plants (WTPs) were investigated through field and laboratory studies. Haloacetic acids (HAAs) and haloacetonitriles (HANs) were identified to be two representative DBPs based on cytotoxicity and genotoxicity assessments. The performances of advanced treatment train for HAAs and HAN...
Source: Chemosphere - June 24, 2021 Category: Chemistry Authors: Ying Yu Xin Huang Ruya Chen Linlin Pan Baoyou Shi Source Type: research

Development of an efficient remediation system with a low cost after identification of water pollutants including phenolic compounds in a tannery built-up area in Bangladesh
Chemosphere. 2021 Oct;280:130959. doi: 10.1016/j.chemosphere.2021.130959. Epub 2021 May 20.ABSTRACTWater pollution caused by tannery wastewater is an important issue in developing countries. Most studies have focused on inorganic chemicals represented by chromium as a tannery-related main pollutant. This is the first study in which pollution of water by tannery-related organic chemicals was assessed by a combination of qualitative and quantitative analyses. Our quantitative analysis showed that the maximum concentration of total phenolic compounds (phenols), consisting of phenol, bisphenol F, p-cresol and chlorocresol, in ...
Source: Chemosphere - June 24, 2021 Category: Chemistry Authors: Tian Yuan Akira Tazaki Kazunori Hashimoto M M Aeorangajeb Al Hossain Fitri Kurniasari Nobutaka Ohgami Masayo Aoki Nazmul Ahsan Anwarul Azim Akhand Masashi Kato Source Type: research

Separation of pollutants from aqueous solution using nanoclay and its nanocomposites: A review
Chemosphere. 2021 Oct;280:130961. doi: 10.1016/j.chemosphere.2021.130961. Epub 2021 May 20.ABSTRACTWastewater is always composed of different pollutants, most of which are toxic to the living being. It is very tough to separate all those diverse groups of contaminants using a single process or single material. Rather a sustainable and environment friendly processes should be adapted to restrict the secondary pollution generation. Nanoclay and its nanocomposites are one of the most used adsorbents that have been modified and used for the separation of almost all types of pollutants, including dyes, heavy metals, fluoride, n...
Source: Chemosphere - June 24, 2021 Category: Chemistry Authors: Suvendu Manna Pratik Das Piyali Basak Amit Kumar Sharma Vishal Kumar Singh Ravi Kumar Patel Jitendra Kumar Pandey Veeramuthu Ashokkumar Arivalagan Pugazhendhi Source Type: research

Effect of urea on chlorinated aromatics formation mediated by copper and iron species in combustion flue gas
In this study, we investigated the formation of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) and polychlorinated polychlorinated naphthalenes (PCNs) via electrophilic chlorination and precursor pathway mediated by model fly ashes containing Cu and Fe species with or without urea addition. The results indicated that the addition of urea promoted the direct chlorination of parent aromatics over Cu (Ⅱ) chlorides and the coupling reaction of chlorophenols over Fe species, while suppressed the catalytic chlorination of parent aromatics over Fe (Ⅲ) chlorides and the coupling reaction of chlorophenols over Cu...
Source: Chemosphere - June 24, 2021 Category: Chemistry Authors: Meihui Ren Haijun Zhang Hongquan Zhou Yun Fan Rong Cao Yuan Gao Jiping Chen Source Type: research

Calcium hydroxide content and hydration degree of cement in cementitious composites containing calcium silicate slag
Chemosphere. 2021 Oct;280:130918. doi: 10.1016/j.chemosphere.2021.130918. Epub 2021 May 17.ABSTRACTCalcium silicate slag (CSS) is a secondary solid waste produced by the technology of extracting Al2O3 from fly ash. CSS was used in the present study to replace part of the cement to prepare cementitious composites. The calcium hydroxide (CH) content of the cementitious composites containing CSS (including the CH content produced by cementitious composites hydration, consumed by pozzolanic reaction of CSS, and residual in cementitious composites) and the hydration degree of cement are analyzed by observing the phase, content,...
Source: Chemosphere - June 24, 2021 Category: Chemistry Authors: Ru Bai Ju Zhang Changwang Yan Shuguang Liu Xiaoxiao Wang Zhijie Yang Source Type: research

Fabrication of conductive ceramic membranes for electrically assisted fouling control during membrane filtration for wastewater treatment
In this study, an electrically assisted technique was developed for the control of fouling on flat-sheet ceramic membranes. The novel conductive membrane was fabricated by coating dopamine and carbon nanotubes (CNTs) onto the surface of an α-alumina membrane support to form a conductive CNT coating. The resulting flat-sheet conductive ceramic membrane (FSCCM) exhibited excellent electric conductivity and stability, which performed well in filtration of the synthetic wastewater containing inorganic matter (kaolin solution) or organic pollutants (oil emulsion). By applying a negative charge on the FSCCM with a DC volta...
Source: Chemosphere - June 24, 2021 Category: Chemistry Authors: Pu Li Chao Yang Feiyun Sun Xiao-Yan Li Source Type: research

Performance and dynamic modeling of a continuously operated pomace olive packed bed for olive mill wastewater treatment and phenol recovery
Chemosphere. 2021 Oct;280:130797. doi: 10.1016/j.chemosphere.2021.130797. Epub 2021 May 16.ABSTRACTThe solid waste of olive oil extraction processes (olive pomace, OP) was converted into activated carbon (AC) by treating it with NaOH and then encapsulating it within sodium alginate (SA) in beads by crosslinking (SA-AC beads). The prepared SA-AC beads were utilized as an adsorbent for the elimination and recovery of phenolic compounds (PCs) from olive mill wastewater (OMWW) following a zero liquid and waste discharge approach to implement and promote the circular economy concept. The novel AC and SA-AC beads were characteri...
Source: Chemosphere - June 24, 2021 Category: Chemistry Authors: Amina Lissaneddine Laila Mandi Mounir El Achaby Emmanuel Mousset Eldon R Rene Naaila Ouazzani Marie-No ëlle Pons Faissal Aziz Source Type: research

The relevant role of ion mobility separation in LC-HRMS based screening strategies for contaminants of emerging concern in the aquatic environment
In this study, the role of IMS-HRMS for the identification of CECs in complex matrices is highlighted, with emphasis on when and with which purpose is of use. The utilization of IMS can result in much cleaner mass spectra, which considerably facilitates data interpretation and the obtaining of reliable identifications. Furthermore, the robustness of IMS measurements across matrices permits the use of CCS as an additional relevant parameter during the identification step even when reference standards are not available. Moreover, an effect on the number of true and false identifications could be demonstrated by including IMS...
Source: Chemosphere - June 24, 2021 Category: Chemistry Authors: Alberto Celma Lutz Ahrens Pablo Gago-Ferrero F élix Hernández Francisco L ópez Johan Lundqvist Elena Pitarch Juan Vicente Sancho Karin Wiberg Lubertus Bijlsma Source Type: research

Vertical microplastic distribution in sediments of Fuhe River estuary to Baiyangdian Wetland in Northern China
This study is helpful to understand the detailed distribution characteristics of microplastics in typical rivers in the northern China, and can provide guidance for reducing microplastic pollution.PMID:34162121 | DOI:10.1016/j.chemosphere.2021.130800 (Source: Chemosphere)
Source: Chemosphere - June 24, 2021 Category: Chemistry Authors: Zeyan Zhou Panyue Zhang Guangming Zhang Siqi Wang Yajing Cai Hongjie Wang Source Type: research

Metal-organic frameworks-derived hierarchical Co < sub > 3 < /sub > O < sub > 4 < /sub > /CoNi-layered double oxides nanocages with the enhanced catalytic activity for toluene oxidation
Chemosphere. 2021 Oct;280:130801. doi: 10.1016/j.chemosphere.2021.130801. Epub 2021 May 5.ABSTRACTThe development of active transition-metal oxide (TMO) catalysts for the abatement of volatile organic compounds (VOCs) remains a great challenge. Controllable synthesis of TMOs with specific morphology and suitable composition is a promising way for acquiring efficient oxidation catalysts. Herein, a series of hierarchical Co3O4/CoNi-layered double oxides (CoNi-LDO) nanocages covered by interlaced nanosheets were synthesized using a cobalt metal-organic framework (Co-MOF)-based strategy. The textural properties, morphology, su...
Source: Chemosphere - June 24, 2021 Category: Chemistry Authors: Zhiruo Wu Huimin Niu Jinghuan Chen Jianmeng Chen Source Type: research

Evidence from in vitro and in vivo studies on the potential health repercussions of micro- and nanoplastics
The objective of this review was to provide an update on the potential health effects of MPs and NPs indicated by in vitro and in vivo studies. In vitro studies have described the absorption of plastic particles of different sizes and have documented their proinflammatory effects and genotoxicity, which can lead to the structural alteration of cells. MPs and NPs have also been implicated in the development of antibiotic resistance. In vivo studies have demonstrated that MPs and NPs can access organisms via dietary and respiratory pathways and through the epidermis. Their reported effects include: changes in microbiota and ...
Source: Chemosphere - June 24, 2021 Category: Chemistry Authors: Anabel Gonz ález-Acedo Enrique Garc ía-Recio Rebeca Illescas-Montes Javier Ramos-Torrecillas Luc ía Melguizo-Rodríguez V íctor Javier Costela-Ruiz Source Type: research

Well-dispersed iron and nitrogen co-doped hollow carbon microsphere anchoring by g-C < sub > 3 < /sub > N < sub > 4 < /sub > for efficient peroxymonosulfate activation
Chemosphere. 2021 Oct;280:130911. doi: 10.1016/j.chemosphere.2021.130911. Epub 2021 May 22.ABSTRACTDeveloping single-atom Fenton-like catalysts with the maximum utilization of active sites present an attractive potential in environmental remediation. Herein, the single-atom Fe and N co-doped hollow carbon microsphere loaded g-C3N4 catalyst (HFeNC-g-C3N4) was prepared by an innovative cascade anchoring strategy using polystyrene as the hard template, iron phthalocyanine, polydopamine and urea as the Fe, N and C precursor, in which the in-situ generated g-C3N4 could not only effectively anchor Fe atom to create the well-disp...
Source: Chemosphere - June 24, 2021 Category: Chemistry Authors: Likun Chen Kewen Xing Qikai Shentu Yifei Huang Weiyang Lv Yuyuan Yao Source Type: research

Environmental modelling of hexamethoxymethylmelamine, its transformation products, and precursor compounds: An emerging family of contaminants from tire wear
This study provides insights into the fate and behaviour of HMMM and its transformation compounds and contributes to the growing literature on the hazards of organic chemicals derived from tire wear.PMID:34162125 | DOI:10.1016/j.chemosphere.2021.130914 (Source: Chemosphere)
Source: Chemosphere - June 24, 2021 Category: Chemistry Authors: Cassandra Johannessen J Mark Parnis Source Type: research