Journal of environmental sciences最新文献_第10页

Identification of key precursors contributing to the formation of CX3R-type disinfection by-products along the typical full-scale drinking water treatment processes 鉴定在典型的全面饮用水处理过程中导致cx3r型消毒副产物形成的关键前体

IF 6.9

Journal of environmental sciences Pub Date : 2023-06-01 DOI: 10.1016/j.jes.2022.07.005

Xu Yang , Shunke Ding , Rong Xiao , Pin Wang , Zhenqi Du , Ruihua Zhang , Wenhai Chu

{"title":"Identification of key precursors contributing to the formation of CX3R-type disinfection by-products along the typical full-scale drinking water treatment processes","authors":"Xu Yang , Shunke Ding , Rong Xiao , Pin Wang , Zhenqi Du , Ruihua Zhang , Wenhai Chu","doi":"10.1016/j.jes.2022.07.005","DOIUrl":"https://doi.org/10.1016/j.jes.2022.07.005","url":null,"abstract":"<div>Identification and characterization of disinfection by-product (DBP) precursors could help optimize drinking water treatment processes and improve the quality of finished water. This study comprehensively investigated the characteristics of dissolved organic matter (DOM), the hydrophilicity and molecule weight (MW) of DBP precursor and DBP-associated toxicity along the typical full-scale treatment processes. The results showed that dissolved organic carbon and dissolved organic nitrogen content, the fluorescence intensity and the SUVA254 value in raw water significantly decreased after the whole treatment processes. Conventional treatment processes were in favor of the removal of high-MW and hydrophobic DOM, which are important precursors of trihalomethane and haloacetic acid. Compared with conventional treatment processes, Ozone integrated with biological activated carbon (O3-BAC) processes enhanced the removal efficiencies of DOM with different MW and hydrophobic fractions, leading to a further decrease in almost all DBP formation potential and DBP-associated toxicity. However, almost 50% of the detected DBP precursors in raw water has not been removed after the coagulation-sedimentation-filtration integrated with O3-BAC advanced treatment processes. These remaining precursors were found to be mainly hydrophilic and low-MW (< 1.0 kDa) organics. Moreover, they would largely contribute to the formation of haloacetaldehydes and haloacetonitriles, which dominated the calculated cytotoxicity. Since current drinking water treatment process could not effectively control the highly toxic DBPs, the removal of hydrophilic and low-MW organics in drinking water treatment plants should be focused on in the future.</div>","PeriodicalId":15774,"journal":{"name":"Journal of environmental sciences","volume":"128 ","pages":"Pages 81-92"},"PeriodicalIF":6.9,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49764664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Electrochemically assisted production of biogenic palladium nanoparticles for the catalytic removal of micropollutants in wastewater treatment plants effluent 电化学辅助生产生物源钯纳米颗粒催化去除废水处理厂出水中的微污染物

IF 6.9

Journal of environmental sciences Pub Date : 2023-06-01 DOI: 10.1016/j.jes.2022.08.018

Cindy Ka Y Law , Kankana Kundu , Luiza Bonin , Lorena Peñacoba-Antona , Eduardo Bolea-Fernandez , Frank Vanhaecke , Korneel Rabaey , Abraham Esteve-Núñez , Bart De Gusseme , Nico Boon

{"title":"Electrochemically assisted production of biogenic palladium nanoparticles for the catalytic removal of micropollutants in wastewater treatment plants effluent","authors":"Cindy Ka Y Law , Kankana Kundu , Luiza Bonin , Lorena Peñacoba-Antona , Eduardo Bolea-Fernandez , Frank Vanhaecke , Korneel Rabaey , Abraham Esteve-Núñez , Bart De Gusseme , Nico Boon","doi":"10.1016/j.jes.2022.08.018","DOIUrl":"10.1016/j.jes.2022.08.018","url":null,"abstract":"<div>Biogenic palladium nanoparticles (bio-Pd NPs) are used for the reductive transformation and/or dehalogenation of persistent micropollutants. In this work, H2 (electron donor) was produced in situ by an electrochemical cell, permitting steered production of differently sized bio-Pd NPs. The catalytic activity was first assessed by the degradation of methyl orange. The NPs showing the highest catalytic activity were selected for the removal of micropollutants from secondary treated municipal wastewater. The synthesis at different H2 flow rates (0.310 L/hr or 0.646 L/hr) influenced the bio-Pd NPs size. The NPs produced over 6 hr at a low H2 flow rate had a larger size (D50 = 39.0 nm) than those produced in 3 hr at a high H2 flow rate (D50 = 23.2 nm). Removal of 92.1% and 44.3% of methyl orange was obtained after 30 min for the NPs with sizes of 39.0 nm and 23.2 nm, respectively. Bio-Pd NPs of 39.0 nm were used to treat micropollutants present in secondary treated municipal wastewater at concentrations ranging from µg/L to ng/L. Effective removal of 8 compounds was observed: ibuprofen (69.5%) < sulfamethoxazole (80.6%) < naproxen (81.4%) < furosemide (89.7%) < citalopram (91.7%) < diclofenac (91.9%) < atorvastatin (> 94.3%) < lorazepam (97.2%). Removal of fluorinated antibiotics occurred at > 90% efficiency. Overall, these data indicate that the size, and thus the catalytic activity of the NPs can be steered and that the removal of challenging micropollutants at environmentally relevant concentrations can be achieved through the use of bio-Pd NPs.</div>","PeriodicalId":15774,"journal":{"name":"Journal of environmental sciences","volume":"128 ","pages":"Pages 203-212"},"PeriodicalIF":6.9,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10763494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Systematical analysis of sludge treatment and disposal technologies for carbon footprint reduction 系统分析污泥处理处置技术对减少碳足迹的影响

IF 6.9

Journal of environmental sciences Pub Date : 2023-06-01 DOI: 10.1016/j.jes.2022.07.038

Yingxin Zhao , Zhifan Yang , Jiaojiao Niu , Zihan Du , Conti Federica , Zhe Zhu , Kaichao Yang , Yan Li , Baofeng Zhao , Thomas Helmer Pedersen , Chunguang Liu , Mutabazi Emmanuel

{"title":"Systematical analysis of sludge treatment and disposal technologies for carbon footprint reduction","authors":"Yingxin Zhao , Zhifan Yang , Jiaojiao Niu , Zihan Du , Conti Federica , Zhe Zhu , Kaichao Yang , Yan Li , Baofeng Zhao , Thomas Helmer Pedersen , Chunguang Liu , Mutabazi Emmanuel","doi":"10.1016/j.jes.2022.07.038","DOIUrl":"10.1016/j.jes.2022.07.038","url":null,"abstract":"<div>This study aims to comprehensively analyze the Greenhouse Gases (GHGs) emissions from current sewage sludge treatment and disposal technologies (building material, landfill, land spreading, anaerobic digestion, and thermochemical processes) based on the database of Science Citation Index (SCI) and Social Science Citation Index (SSCI) from 1998 to 2020. The general patterns, spatial distribution, and hotspots were provided by bibliometric analysis. A comparative quantitative analysis based on life cycle assessment (LCA) put forward the current emission situation and the key influencing factors of different technologies. The effective GHG emissions reduction methods were proposed to mitigate climate change. Results showed that incineration or building materials manufacturing of highly dewatered sludge, and land spreading after anaerobic digestion have the best GHG emissions reduction benefits. Biological treatment technologies and thermochemical processes have great potential for reducing GHGs. Enhancement of pretreatment effect, co-digestion, and new technologies (e.g., injection of carbon dioxide, directional acidification) are major approaches to facilitate substitution emissions in sludge anaerobic digestion. The relationship between the quality and efficiency of secondary energy in thermochemical process and GHGs emission still needs further study. Solid sludge products generated by bio-stabilization or thermochemical processes are considered to have a certain carbon sequestration value and can improve the soil environment to control GHG emissions. The findings are useful for future development and processes selection of sludge treatment and disposal facing carbon footprint reduction.</div>","PeriodicalId":15774,"journal":{"name":"Journal of environmental sciences","volume":"128 ","pages":"Pages 224-249"},"PeriodicalIF":6.9,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10763496","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Distribution characteristics of photoinitiators and their flux estimation from the Pearl River Delta to the coastal waters of the South China Sea 珠江三角洲至南海沿岸光引发剂的分布特征及其通量估算

IF 6.9

Journal of environmental sciences Pub Date : 2023-06-01 DOI: 10.1016/j.jes.2022.08.034

Yuqing He , Zibin Pan , Xinxin Liang , Ruiman Xie , Yuying Sun , Juan Li , Yawei Wang , Lixi Zeng

{"title":"Distribution characteristics of photoinitiators and their flux estimation from the Pearl River Delta to the coastal waters of the South China Sea","authors":"Yuqing He , Zibin Pan , Xinxin Liang , Ruiman Xie , Yuying Sun , Juan Li , Yawei Wang , Lixi Zeng","doi":"10.1016/j.jes.2022.08.034","DOIUrl":"10.1016/j.jes.2022.08.034","url":null,"abstract":"<div>Photoinitiators (PIs) are widely used in industrial polymerization processes. It has been reported that PIs are ubiquitous in indoor environments and that humans are exposed to PIs, but the occurrence of PIs in natural environments are rarely known. In the present study, 25 PIs, including 9 benzophenones (BZPs), 8 amine co-initiators (ACIs), 4 thioxanthones (TXs) and 4 phosphine oxides (POs), were analyzed in water and sediment samples collected from eight riverine outlets of the Pearl River Delta (PRD). Eighteen, 14, and 14 of the 25 target PIs were detected in water, suspended particulate matter (SPM) and sediment samples, respectively. The total concentrations of PIs in water, SPM, and sediment were in the ranges of 2.88‒96.1 ng/L, 9.25‒923 ng/g dry weight (dw), and 3.79‒56.9 ng/g dw, with geometric mean concentration (GM) of 10.8 ng/L, 48.6 ng/g dw, and 17.1 ng/g dw, respectively. A significant linear regression was observed between the log partitioning coefficients (Kd) values of PIs and their log octanol water partition coefficient (Kow) values (R2 = 0.535, p < 0.05). The annual riverine input of PIs to the coastal waters of the South China Sea via eight main outlets of the PRD was estimated to be 4.12 × 103 kg/year, and the ∑BZPs, ∑ACIs, ∑TXs and ∑POs contributed to 1.96 × 103, 1.24 × 103, 89.6 and 830 kg/year, respectively. This is the first report of a systematic description of the occurrence characteristics of PIs exposure in water, SPM, and sediment. The environmental fate and risks of PIs in aquatic environments need further investigations.</div>","PeriodicalId":15774,"journal":{"name":"Journal of environmental sciences","volume":"128 ","pages":"Pages 71-80"},"PeriodicalIF":6.9,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9263101","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Metagenomic analysis to determine the characteristics of antibiotic resistance genes in typical antibiotic-contaminated sediments 宏基因组分析确定典型抗生素污染沉积物中抗生素耐药性基因的特征

IF 6.9

Journal of environmental sciences Pub Date : 2023-06-01 DOI: 10.1016/j.jes.2022.08.014

Han Yang , Mu Xu , Liqing Wang , Xianyun Wang , Erik Jeppesen , Wei Zhang

{"title":"Metagenomic analysis to determine the characteristics of antibiotic resistance genes in typical antibiotic-contaminated sediments","authors":"Han Yang , Mu Xu , Liqing Wang , Xianyun Wang , Erik Jeppesen , Wei Zhang","doi":"10.1016/j.jes.2022.08.014","DOIUrl":"10.1016/j.jes.2022.08.014","url":null,"abstract":"<div>Comprehensive studies of the effects of various physical and chemical variables (including heavy metals), antibiotics, and microorganisms in the environment on antibiotic resistance genes are rare. We collected sediment samples from the Shatian Lake aquaculture area and surrounding lakes and rivers located in Shanghai, China. The spatial distribution of sediment ARGs was assessed by metagenomic analysis that revealed 26 ARG types (510 subtypes), dominated by Multidrug, β-lactam, Aminoglycoside, Glycopeptides, Fluoroquinolone, and Tetracyline. Redundancy discriminant analysis indicated that antibiotics (SAs and MLs) in the aqueous environment and sediment along with water TN and TP were the key variables affecting the abundance distribution of total ARGs. However, the main environmental drivers and key influences differed among the different ARGs. For total ARGs, the environmental subtypes affecting their structural composition and distribution characteristics were mainly antibiotic residues. Procrustes analysis showed a significant correlation between ARGs and microbial communities in the sediment in the survey area. Network analysis revealed that most of the target ARGs were significantly and positively correlated with microorganisms, and a small number of ARGs (e.g., rpoB, mdtC, and efpA) were highly significantly and positively correlated with microorganisms (e.g., Knoellia, Tetrasphaera, and Gemmatirosa). Potential hosts for the major ARGs included Actinobacteria, Proteobacteria, and Gemmatimonadetes. Our study provides new insight and a comprehensive assessment of the distribution and abundance of ARGs and the drivers of ARG occurrence and transmission.</div>","PeriodicalId":15774,"journal":{"name":"Journal of environmental sciences","volume":"128 ","pages":"Pages 12-25"},"PeriodicalIF":6.9,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10816164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Feasibility of housefly larvae-mediated vermicomposting for recycling food waste added digestate as additive 家蝇幼虫介导蚯蚓堆肥回收添加食糜添加剂的可行性

IF 6.9

Journal of environmental sciences Pub Date : 2023-06-01 DOI: 10.1016/j.jes.2022.07.016

Guangyu Cui , Fan Lü , Tao Lu , Hua Zhang , Pinjing He

{"title":"Feasibility of housefly larvae-mediated vermicomposting for recycling food waste added digestate as additive","authors":"Guangyu Cui , Fan Lü , Tao Lu , Hua Zhang , Pinjing He","doi":"10.1016/j.jes.2022.07.016","DOIUrl":"10.1016/j.jes.2022.07.016","url":null,"abstract":"<div>The development of methods for the efficient treatment and application of food waste digestate is an important research goal. Vermicomposting via housefly larvae is an efficient way to reduce food waste and achieve its valorization, however, studies on the application and performance of digestate in vermicomposting are rarely. The present study aimed to investigate the feasibility of the co-treatment of food waste and digestate as an additive via larvae. Restaurant food waste (RFW) and household food waste (HFW) were selected to assess the effects of waste type on vermicomposting performance and larval quality. Waste reduction rates of 50.9%–57.8% were observed in the vermicomposting of food waste mixed with digestate at a ratio of 25%, which were slightly lower than those for treatments without the addition of digestate (62.8%–65.9%). The addition of digestate increased the germination index, with a maximum value of 82% in the RFW treatments with 25% digestate, and decreased the respiration activity, with a minimum value of 30 mg-O2/g-TS. The larval productivity of 13.9% in the RFW treatment system with a digestate rate of 25% was lower that without digestate (19.5%). Materials balance shows that larval biomass and metabolic equivalent had decreasing trends as the amount of digestate increased and HFW vermicomposting exhibited lower bioconversion efficiency than that of RFW treatment system regardless of the addition of digestate. These results suggest that mixing digestate at a low ratio (25%) during vermicomposting of food waste especially RFW could lead to considerable larval biomass and generate relatively stable residues.</div>","PeriodicalId":15774,"journal":{"name":"Journal of environmental sciences","volume":"128 ","pages":"Pages 150-160"},"PeriodicalIF":6.9,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10757924","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

The performance and mechanism of iron-mediated chemical oxidation: Advances in hydrogen peroxide, persulfate and percarbonate oxidation 铁介导的化学氧化的性能和机理:过氧化氢、过硫酸盐和过碳酸盐氧化的研究进展

IF 6.9

Journal of environmental sciences Pub Date : 2023-06-01 DOI: 10.1016/j.jes.2022.07.037

Mengqi Han , Hui Wang , Wei Jin , Wenhai Chu , Zuxin Xu

{"title":"The performance and mechanism of iron-mediated chemical oxidation: Advances in hydrogen peroxide, persulfate and percarbonate oxidation","authors":"Mengqi Han , Hui Wang , Wei Jin , Wenhai Chu , Zuxin Xu","doi":"10.1016/j.jes.2022.07.037","DOIUrl":"10.1016/j.jes.2022.07.037","url":null,"abstract":"<div>Many studies have successfully built iron-mediated materials to activate or catalyze Fenton-like reactions, with applications in water and wastewater treatment being investigated. However, the developed materials are rarely compared with each other regarding their performance of organic contaminant removal. In this review, the recent advances of Fenton-like processes in homogeneous and heterogeneous ways are summarized, especially the performance and mechanism of activators including ferrous iron, zero valent iron, iron oxides, iron-loaded carbon, zeolite, and metal organic framework materials. Also, this work mainly compares three O-O bond containing oxidants including hydrogen dioxide, persulfate, and percarbonate, which are environmental-friendly oxidants and feasible for in-situ chemical oxidation. The influence of reaction conditions, catalyst properties and benefits are analyzed and compared. In addition, the challenges and strategies of these oxidants in applications and the major mechanisms of the oxidation process have been discussed. This work can help understand the mechanistic insights of variable Fenton-like reactions, the role of emerging iron-based materials, and provide guidance for choosing appropriate technologies when facing real-world water and wastewater applications.</div>","PeriodicalId":15774,"journal":{"name":"Journal of environmental sciences","volume":"128 ","pages":"Pages 181-202"},"PeriodicalIF":6.9,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10763495","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 15

Adhesive surface-enhanced Raman scattering Cu–Au nanoassembly for the sensitive analysis of particulate matter 粘附表面增强拉曼散射Cu-Au纳米组件用于颗粒物质的敏感分析

IF 6.9

Journal of environmental sciences Pub Date : 2023-06-01 DOI: 10.1016/j.jes.2022.07.027

Ning Wang , Zhiqiang Gan , Fengkui Duan , Hui Chen , Chensheng Ma , Jie Ji , Zhenli Sun

{"title":"Adhesive surface-enhanced Raman scattering Cu–Au nanoassembly for the sensitive analysis of particulate matter","authors":"Ning Wang , Zhiqiang Gan , Fengkui Duan , Hui Chen , Chensheng Ma , Jie Ji , Zhenli Sun","doi":"10.1016/j.jes.2022.07.027","DOIUrl":"10.1016/j.jes.2022.07.027","url":null,"abstract":"<div>Surface-enhanced Raman scattering (SERS) has been used in atmospheric aerosol detection as it enables the high-resolution analysis of particulate matter. However, its use in the detection of historical samples without damaging the sampling membrane while achieving effective transfer and the high-sensitivity analysis of particulate matter from sample films remains challenging. In this study, a new type of SERS tape was developed, consisting of Au nanoparticles (NPs) on an adhesive double-sided Cu film (DCu). The enhanced electromagnetic field generated by the coupled resonance of the local surface plasmon resonances of AuNPs and DCu led to an enhanced SERS signal with an experimental enhancement factor of 107. The AuNPs were semi-embedded and distributed on the substrate, and the viscous DCu layer was exposed, enabling particle transfer. The substrates exhibited good uniformity and favorable reproducibility with relative standard deviations of 13.53% and 9.74% respectively, and the substrates could be stored for 180 days with no signs of signal weakening. The application of the substrates was demonstrated by the extraction and detection of malachite green and ammonium salt particulate matter. The results demonstrated that SERS substrates based on AuNPs and DCu are highly promising in real–world environmental particle monitoring and detection.</div>","PeriodicalId":15774,"journal":{"name":"Journal of environmental sciences","volume":"128 ","pages":"Pages 35-44"},"PeriodicalIF":6.9,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10763493","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Removal of iodide anions in water by silver nanoparticles supported on polystyrene anion exchanger 聚苯乙烯负离子交换剂负载银纳米粒子去除水中碘离子

IF 6.9

Journal of environmental sciences Pub Date : 2023-06-01 DOI: 10.1016/j.jes.2022.08.012

Li Li , Su-Juan Yu , Rong-Gang Zheng , Peng Li , Qing-Cun Li , Jing-Fu Liu

{"title":"Removal of iodide anions in water by silver nanoparticles supported on polystyrene anion exchanger","authors":"Li Li , Su-Juan Yu , Rong-Gang Zheng , Peng Li , Qing-Cun Li , Jing-Fu Liu","doi":"10.1016/j.jes.2022.08.012","DOIUrl":"10.1016/j.jes.2022.08.012","url":null,"abstract":"<div>The removal of iodide (I−) from source waters is an effective strategy to minimize the formation of iodinated disinfection by-products (DBPs), which are more toxic than their brominated and chlorinated analogues. In this work, a nanocomposite Ag-D201 was synthesized by multiple in situ reduction of Ag-complex in D201 polymer matrix, to achieve highly efficient removal of iodide from water. Scanning electron microscope /energy dispersive spectrometer characterization showed that uniform cubic silver nanoparticles (AgNPs) evenly dispersed in the D201 pores. The equilibrium isotherms data for iodide adsorption onto Ag-D201 was well fitted with Langmuir isotherm with the adsorption capacity of 533 mg/g at neutral pH. The adsorption capacity of Ag-D201 increased with the decrease of pH in acidic aqueous solution, and reached the maximum value of 802 mg/g at pH 2. This was attributed to the oxidization of I−, by dissolved oxygen under the catalysis of AgNPs, to I2 which was finally adsorbed as AgI3. However, the aqueous solutions at pH 7 – 11 could hardly affect the iodide adsorption. The adsorption of I− was barely affected by real water matrixes such as competitive anions (SO42−, NO3−, HCO3−, Cl−) and natural organic matter, of which interference of NOM was offset by the presence of Ca2+. The proposed synergistic mechanism for the excellent performance of iodide adsorption by the absorbent was ascribed to the Donnan membrane effect caused by the D201 resin, the chemisorption of I− by AgNPs, and the catalytic effect of AgNPs.</div>","PeriodicalId":15774,"journal":{"name":"Journal of environmental sciences","volume":"128 ","pages":"Pages 45-54"},"PeriodicalIF":6.9,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10763497","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Adsorption of glycine at the anatase TiO2/water interface: Effects of Ca2+ ions 甘氨酸在锐钛矿型TiO2/水界面上的吸附：Ca2+离子的影响

IF 6.9

Journal of environmental sciences Pub Date : 2023-06-01 DOI: 10.1016/j.jes.2022.08.016

Yanli Yang , Jiaqi Liu , Mengyao Zhu , Shengping Dou , Lei Ding

{"title":"Adsorption of glycine at the anatase TiO2/water interface: Effects of Ca2+ ions","authors":"Yanli Yang , Jiaqi Liu , Mengyao Zhu , Shengping Dou , Lei Ding","doi":"10.1016/j.jes.2022.08.016","DOIUrl":"https://doi.org/10.1016/j.jes.2022.08.016","url":null,"abstract":"<div>Adsorption reactions of amino acids (AAs) on TiO2 nanoparticles (NPs) play an important role in the available nutrients in soils and sediments. The pH effects on glycine adsorption have been studied, but little is known about its coadsorption with Ca2+ at the molecular level. Combined attenuated total reflectance Fourier transform infrared (ATR-FTIR) flow-cell measurements and density functional theory (DFT) calculations were used to determine the surface complex and corresponding dynamic adsorption/desorption processes. The structures of glycine adsorbed onto TiO2 were closely associated with its dissolved species in the solution phase. The presence of Ca2+ exerted different influences on glycine adsorption within pH 4−11, thus affecting its migration rate in soils and sediments. The mononuclear bidentate complex at pH 4−7, involving the COO− moiety of zwitterionic glycine, remained unchanged in the absence and presence of Ca2+. At pH 11, the mononuclear bidentate complex with deprotonated NH2 can be removed from the TiO2 surface upon coadsorption with Ca2+. The bonding strength of glycine on TiO2 was much weaker than that of the Ca-bridged ternary surface complexation. Glycine adsorption was inhibited at pH 4 but was enhanced at pH 7 and 11.</div>","PeriodicalId":15774,"journal":{"name":"Journal of environmental sciences","volume":"128 ","pages":"Pages 26-34"},"PeriodicalIF":6.9,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49747016","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1