MOLECULES
·
2022
·Vol. 27
·期 22
·8037
·
IF 4.927
Xiaoyu Guan,Juntao Guo,Hui Zhang,Shiyong Tao,Gilles Mailhot,Feng Wu,Jing Xu
The adsorption of antibiotics on minerals is an important process in their environment behavior. The adsorption behavior of antibiotics on iron-containing minerals and the effect of co-existing cations and anions were studied in this work. Magnetite, hematite, goethite and kaolin were selected as the representative minerals and characterized by SEM, XRD and BET. A total of eight antibiotics, including three quinolones, three sulfonamides and two mycins were chosen as the research targets. Results showed a higher adsorption amount of quinolones than that of sulfonamides and mycins on the surface of iron-containing minerals in most mineral systems. The adsorption isotherms of quinolones can be well fitted using the Freundlich models. The effects of five cations and five anions on the adsorption of quinolones were investigated, among which Mg2+, Ca2+, HCO3−and H2PO4−mainly showed significant inhibition on the adsorption, while the effects of K+, Na+, NH4+, Cl−, NO3−and SO42−showed less. Natural surface water samples were also collected and used as media to investigate the adsorption behavior of quinolones on iron-containing minerals. The buffering capacity of the natural water kept the reaction solution at circumneutral conditions, and the adsorption amount was mostly promoted in the goethite system (from 0.56~0.78 μmol/g to 0.52~1.43 μmol/g), but was inhibited in the other systems (magnetite: from 1.13~1.33 μmol/g to 0.45~0.76 μmol/g; hematite: from 0.52~0.65 μmol/g to 0.02~0.18 μmol/g; kaolin: from 1.98~1.99 μmol/g to 0.90~1.40 μmol/g). The results in this work help to further understand the transportation and fate of antibiotics in an aqueous environment.Keywords:antibiotics;iron-containing minerals;adsorption;co-existing ions;natural surface water
研究领域:
环境科学
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化学
·
矿物学
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产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL POLLUTION
·
2021
·
IF 8.071
Chushan Huang,Jiaji Zhang,Guocheng Hu,Lijuan Zhang,Haibo Chen,Dongyang Wei,Dan Cai,Yunjiang Yu,Xin Li,Ping Ding,Jing Li
Previous studies of perfluorinated alkyl substances (PFASs) in receiving water bodies of typical industrial parks under the low-carbon development mode are scarce. In the present study, 18 PFASs were analyzed in surface water and sediment samples of the inland river basin in Longgang District in 2017. The ΣPFAS concentrations in surface water (drought and rainy periods) and sediment ranged from 15.17 to 948.50 ng/L, 11.56–561.14 ng/L, and 1.07–28.94 ng/g dw, respectively. Perfluorooctane sulfonate (PFOS), perfluorooctanoic acid (PFOA) and perfluorobutane sulfonate (PFBS) were the dominant pollutants in surface water, with maximum concentrations of 867.68 ng/L, 288.28 ng/L, and 245.09 ng/L, respectively. Meanwhile, PFOS, perfluoroundecanoic acid (PFUdA), PFBS, and perfluorodecanoic acid (PFDA) were the major PFASs in the sediment samples, with maximum concentrations of 9.83 ng/g dw, 11.86 ng/g dw, 5.30 ng/g dw, and 5.23 ng/g dw, respectively. In addition, PFOA and PFOS resulted from similar sources in sediment and surface water samples ( P < 0.05). The risk quotient value (RQ) results showed that the control of PFOS in the treatment of pollutants in the inland river basin of Longgang District deserves more attention.
研究领域:
环境科学
·
污染生态学
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DOI
高影响因子
WATER RESEARCH
·
2025
·
IF 12.4
Shuning Wang,Cheng Peng,Nan Sheng,Lushi Lian,Jiayin Dai,Xiaohong Guan
Bisphenol analogues (BPs), a prominent group of endocrine-disrupting compounds, are widely used in the production of epoxy resins and polycarbonate plastics, leading to their inevitable release into aquatic environments. However, limited data exists on the occurrence of BPs in drinking water sources and upstream rivers. In this study, we developed and validated a solid-phase extraction method coupled with ultra-performance liquid chromatography-tandem mass spectrometry for the trace-level detection and simultaneous quantification of 19 BPs in surface water. Seventeen BPs were detected in the Taipu River with concentrations ranging from non-detectable to 38.2 ng L –1 and industrial discharges may be a primary source of BPs contamination. For the first time, the presence of bisphenol C-dichloride (BPC-di) and tetrachlorobisphenol A in surface water was reported, with mean concentrations of 11.5 ng L –1 and 2.0 ng L –1 , respectively. In drinking source water, 15 BPs were found, with bisphenol A, bisphenol B, and BPC-di being the most abundant ones. Additionally, a comprehensive toxicity assessment was performed to evaluate the ecological risks associated with these BPs. Although risk quotient values indicated negligible ecological risk for these BPs, estrogen equivalence values suggested potential estrogenic risks in the river. This study provides new insights into the occurrence, ecological risks, and estrogenic effects of BPs in source water and its upstream river systems.
研究领域:
环境科学
·
毒理学
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分析化学
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产品关联
DOI
PubMed
高影响因子
Analytical Methods
·
2013
·Vol. 5
·期 5
·1150-1154
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IF 1.855
Sheng Liu,Xian-Zheng Wu,Zi-Hui Gao,Fang Jiao
A mini-solid phase extractor (MSPE) was designed and applied in the on-site determination of trace levels of chloramphenicol. The results showed that 1.5 g of the macroporous XAD-16 resin was suitable for capturing chloramphenicol from 500 mL of solution. Methanol was used as the eluent to desorb chloramphenicol from the resin. Chloramphenicol was determined by HPLC at 278 nm with a mobile phase of 0.01 mol L−1 oxalic acid–acetonitrile (40 : 60 v/v), the retention time was around 5.07 min. The detection scope of chloramphenicol was between 0.004 and 0.120 mg L−1. Using the MSPE, chloramphenicol in surface water and hospital sewage was determined with recoveries of 96 to 108% and RSDs of less than 6.8%. The MSPE achieved a rapid on-site preconcentration of chloramphenicol and avoided the inconvenient transportation and storage of large volumes of water sample.
研究领域:
环境分析化学
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药物残留监测
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水环境污染
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样品前处理技术
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DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2019
·
IF 5.589
Rong Chen,Hui Liu,Peng Zhang,Lei Zhao,Kang Ding,Songhu Yuan
Groundwater table fluctuation during natural and anthropogenic processes can facilitate the interaction between oxygen (O 2 ) from the unsaturated zone and ferrous iron (Fe 2+ ) from the saturated zone. In light of previous findings that Fe(III)-reducing bacteria can be killed by the reactive oxidants produced from Fe 2+ oxidation under static oxic conditions, we hypothesize that Fe(III)-reducing bacteria will be attenuated during groundwater table fluctuations. To test this hypothesis, this study explored the variations of cell numbers of Shewanella oneidensis strain MR-1 (MR-1), a typical strain of Fe(III)-reducing bacteria, together with dissolved oxygen (DO) and Fe 2+ , at different points during controlled groundwater table fluctuations in a sand column. The results showed that, during the rise of the water table, O 2 in the pore air was entrapped by the deoxygenated groundwater, and Fe 2+ in the groundwater was oxidized by the entrapped O 2 . In this process, 1.40–2.42 orders of magnitude of viable MR-1 cells were killed at different points in the column. Further investigation proposed that the death of MR-1 is caused by the production of intracellular reactive oxidants, such as O 2 • − and OH•, from the oxidation of adsorbed/absorbed Fe 2+ instead of by bulk reactive oxidants, such as OH• and Fe(IV), produced from the oxidation of aqueous Fe 2+ . The findings here provide new insights for Fe biogeochemical cycling in the redox-dynamic zone.
研究领域:
环境微生物学
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水文学
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生物地球化学
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产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Hui Zhou,Liye Tian,Maofei Ni,Sixi Zhu,Runyu Zhang,Liying Wang,Ming Wang,Zhikang Wang
In this study, disinfection by-products (DBP) formation from dissolved organic matter (DOM) and its fractions, including both hydrophilic and hydrophobic components, were investigated at a typical karst surface water. The subsequent DBP formation potential was evaluated by deducing chemical characteristics of DOM fractions and representative algal organic matter ( Chlorella sp. AOM) under the influence of divalent ions (Ca 2+ and Mg 2+ ) via spectra analysis. Both terrigenous and autochthonous DOM performed as critical DBP precursors, and DBP formation patterns were tightly correlated to organic matter chemical variations. DBP formation was significantly higher in drought period compared to that in wet period (P < 0.05). Particularly, trichloromethane (TCM) and dichloroacetonitrile (DCAN) showed distinct formation patterns compared to the scenarios in non-karst water. For DOM fractions, hydrophobic components showed higher DBP formation compared to hydrophilic counterparts, hydrophilic neutral enriched more reactive organic nitrogen for N-DBPs production. It was preferable to enrich humic-like substances after Ca 2+ and Mg 2+ complexation in Chlorella sp. AOM, TCM formation increased whereas DCAN production remained unchanged in the presence of divalent ions. This study innovatively provided a linkage between chemical characteristics of DOM and understanding of DBP formation in karst surface water.
研究领域:
环境科学
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水质研究
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产品关联
DOI
PubMed
高影响因子
International Journal of Environmental Research and Public Health
·
2019
·Vol. 17
·期 1
·134
·
IF 2.468
Kamran Bashir,Zhimin Luo,Guoning Chen,Hua Shu,Xia Cui,Wen Li,Wang Lu,Qiang Fu
Griseofulvin (GSF) is clinically employed to treat fungal infections in humans and animals. GSF was detected in surface waters as a pharmaceutical pollutant. GSF detection as an anthropogenic pollutant is considered as a possible source of drug resistance and risk factor in ecosystem. To address this concern, a new extraction and enrichment method was developed. GSF-surface molecularly imprinted polymers (GSF-SMIPs) were prepared and applied as solid phase extraction (SPE) sorbent. A dispersive solid phase extraction (DSPE) method was designed and combined with HPLC for the analysis of GSF in surface water samples. The performance of GSF-SMIPs was assessed for its potential to remove GSF from water samples. The factors affecting the removal efficiency such as sample pH and ionic strength were investigated and optimized. The DSPE conditions such as the amount of GSF-SMIPs, the extraction time, the type and volume of desorption solvents were also optimized. The established method is linear over the range of 0.1–100 µg/mL. The limits of detection and quantification were 0.01 and 0.03 µg/mL respectively. Good recoveries (91.6–98.8%) were achieved after DSPE. The intra-day and inter-day relative standard deviations were 0.8 and 4.3% respectively. The SMIPs demonstrated good removal efficiency (91.6%) as compared to powder activated carbon (67.7%). Moreover, the SMIPs can be reused 10 times for water samples. This is an additional advantage over single-use activated carbon and other commercial sorbents. This study provides a specific and sensitive method for the selective extraction and detection of GSF in surface water samples.Keywords:dispersive solid phase extraction;griseofulvin;HPLC;removal and analysis;pharmaceutical pollutants;surface water
研究领域:
环境科学
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分析化学
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产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2022
·
IF 11.357
Xiaolin Fan,Jilong Guo,Xiaojing Jia,Xingtai Mao,Ying Zhou,Yue Wang,Xuan Guo,Jiashu Shen,Narma Huai,Kailun Zhang,Abida Abdusalam,Hongxia Hu,Hua Zhu,Chengxia Jia,Lan Cheng,Xiqing Li,Zhaobin Zhang
Fluorene-9-bisphenol (BHPF), a bisphenol A (BPA) substitute, has been increasingly used as a material in syntheses of polymers that are widely used in road markings, artificial tracks, coating floors, building paints, etc., increasing the likelihood of BHPF contamination in the aquatic environment due to its release from the products. However, to date, it is unknown whether it may have actual impacts on fish in real environments. In this study, a 105-day exposure experiment of BHPF at various concentrations (0.01, 0.1, 1, and 10 μg/L) on Chinese medaka (Oryzias sinensis) was performed under laboratory conditions and found decreased fecundity, such as lower egg qualities and quantities, retarded oogenesis, and atretic follicles in the fish and deformed eyes and bodies in its F1 generation. Toxico-transcriptome analyses showed that estrogen-responsive genes were significantly suppressed by BHPF, indicating that antagonist properties of BHPF on estrogen receptors might be causes for the decreased fecundity. Field investigations (Beijing) demonstrated that BHPF was detectable in 60% surface waters, with a mean concentration of 10.49 ± 6.33 ng/L, by gas chromatography–mass spectrometry, and similar effects in wild Chinese medaka were also observed, some of which the parameters were found to be obviously correlated with the BHPF levels in corresponding waters.
研究领域:
环境科学
·
毒理学
·
水生生态学
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分子生物学
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产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Yuchen Guo,Zhongyu Guo,Lilan Zhang,Chihiro Yoshimura,Zimi Ye,Pengfei Yu,Yao Qian,Yuta Hatano,Jieqiong Wang,Junfeng Niu
Antihypertensive propranolol (PRO) is frequently detected in surface waters and has adverse effects on aquatic organisms. In this study, its photochemical fate in surface water with the aspect of kinetics, products and toxicity were investigated employing steady-state photochemistry experiments and ecotoxicity tests. The results showed that photodegradation of PRO was enhanced in river water than that in phosphate buffer where dissolved organic matter (DOM), NO 3 − , and HCO 3 − played important roles. DOM accelerated the photodegradation mainly through generation of excited triplet-state DOM while NO 3 − played dual roles in the photodegradation. The reaction between excited triplet-state PRO and HCO 3 − can generate carbonate radical (CO 3 ·- ) to promote the photodegradation. The second-order reaction rate constant between PRO and CO 3 ·- was determined to be (3.4 ± 0.8) × 10 8 M −1 s −1 . Eight photodegradation products were identified in the studied river water sample. Finally, the toxicity evaluated by Vibrio fischeri increased after photodegradation and three photodegradation products were responsible for the increasing toxicity, which was concluded from the significant correlation between toxicity parameters and quantity of the photodegradation products.
研究领域:
环境科学
·
化学工程
·
毒理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DESALINATION
·
2024
·
IF 8.3
Xuewu Zhu,Feiyue Ge,Xinwei Kang,Liping Qiu,Bin Liu,Jingtao Xu,Feihong Wang,Daoji Wu,Zhe Yang,Daliang Xu,Heng Liang
Nanofiltration membranes (NF) possessing high flux, excellent selectivity, and chlorine resistance are urgently required for healthy drinking water treatment. In this work, we prepared a high-performance polyesteramide (PEA) nanofiltration membrane featuring polyester and polyamide composite structures using piperazine (PIP) and polyvinyl alcohol (PVA) as co -monomers via sodium hydroxide catalyzing interfacial polymerization. The resultant NF membranes' surface morphology, chemical structure, filtration performance, and chlorine stability were systematically evaluated. The optimized PEA membrane (PEA-TFC) possessed a terraced morphology and relatively high roughness (23.9 nm). During purifying real surface water, a high flux (20.29 LMH bar −1 ) with <50 % mineral rejection and over 70 % organic matter removal was achieved for PEA-TFC, demonstrating excellent organic/mineral selectivity. In addition, the polyamide and polyester structures provided uniform pore size distribution and fewer chlorine-active sites, granting PEA-TFC excellent chlorine resistance and stability. The exceptional organic/mineral selective separations and remarkable chlorine resistance endow the PEA-TFC as a promising candidate for healthy drinking water NF.
研究领域:
环境科学
·
材料科学
·
水处理技术
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产品关联
DOI
高影响因子
Journal of Environmental Sciences
·
2018
·
IF 3.12
Fan Bu,Baoyu Gao,Qinyan Yue,Xue Shen,Wenyu Wang
Coagulation–ultrafiltration (C–UF) is widely used for surface water treatment. With the removal of pollutants, the characteristics of organic matter change and affect the final treatment efficiency and the development of membrane fouling . In this study, we built a dynamic C–UF set-up to carry out the treatment of micro-polluted surface water, to investigate the characteristics of dissolved organic matter from different units. The influences of poly aluminum chloride and poly dimethyldiallylammonium chloride (PDMDAAC) on removal efficiency and membrane fouling were also investigated. Results showed that the dosage of PDMDAAC evidently increased the UV 254 and dissolved organic carbon removal efficiencies, and thereby alleviated membrane fouling in the C–UF process. Most hydrophobic bases (HoB) and hydrophobic neutral fractions could be removed by coagulation. Similarly, UF was good at removing HoB compared to hydrophilic substances (HiS) and hydrophobic acid (HoA) fractions. HiS and HoA fractions with low molecule weight accumulated on the surface of the membrane, causing the increase of transmembrane pressure (TMP). Membrane fouling was mainly caused by a removable cake layer, and mechanical cleaning was an efficient way to decrease the TMP.
研究领域:
环境工程
·
水处理技术
·
膜分离
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有机地球化学
·
给水处理
✓ 已验证
DOI
高影响因子
ACS Omega
·
2023
·
IF 4.1
Xinwei Jiang,Julin Yuan,Zhijie Zheng,Yufang Tao,Xiaogang Wu
This study evaluated the effects of ultraviolet (UV) photolysis combined with electrochemical oxidation on sulfonamides (SAs) as well as its treated effluent on the bacterial community in surface water. In terms of degradation rate, the best anode material for electrochemical oxidation was Ti/RuO2–IrO2, which had the highest degradation kinetic constant compared to Ti/Ta2O5–IrO2 and Ti/Pt. Experiments showed the highest degradation rate of SAs at 8.3 pH. Similarly, increasing the current leads to stronger degradation due to the promotion of free chlorine production, and its energy consumption rate decreases slightly from 73 to 67 W h/mmol. Compared with tap water, the kinetic constants decreased by 20–62% for SAs in three different surface water samples, which was related to the decrease in free chlorine. When extending the reaction time to 24 h, the concentrations of chemical oxygen demand and total organic carbon decreased by approximately 30–40%, indicating that the SAs and their products could be mineralized. The diversity analysis showed that the effluents influenced the richness and diversity of the bacterial community, particularly in the 4 h sample. Additionally, there were 86 operational taxonomic units common to all samples, excluding the 4 h sample; significant differences were derived from changes in the Actinobacteriota and Bacteroidota phyla. The toxicity of the products might explain these changes, and these products could be mineralized, as observed in the 24 h sample. Therefore, the extension of treatment time would greatly reduce the ecological harm of treated effluent and ensure that the UV/electrochemical process is a feasible treatment option. Overall, this study provides valuable insight into the optimization and feasibility of UV/electrochemical processes as a sustainable treatment option for sulfonamide-contaminated water sources, emphasizing the importance of considering ecological impacts and the need for extended treatment times that address environmental concerns and ensuring improved water quality.
研究领域:
环境科学
·
水处理
·
微生物学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）