Journal of Environmental Sciences
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2025
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IF 6.3
Zixin Pan,Zhenguo Qi,Panyue Zhang,Yao Zhang,Wenxian Wang,Xin Huang,Baoyou Shi
Although activated carbon filters are thought to be the best way to remove per- and polyfluorinated alkyl substances (PFAS), it is yet unknown how biofilms affect PFAS removal. This study first examined how the removal of PFAS in full-scale drinking water treatment plants (DWTPs) was impacted by biofilm from biological activated carbon (BAC) of varying depths and carbon ages. PFAS desorption from BAC was visible, but at this point, BAC could still remove dissolved organic matter (DOM) efficiently. Studies have demonstrated that the use of activated carbon filters can dramatically lower the content of PFAS in water, with the amount of PFAS reducing as the filter's depth grows and its use duration increases. Additionally, pore-clogging becomes more noticeable as the biofilm ages, which reduces BAC's capacity to eliminate PFAS and hinders PFAS desorption. Furthermore, the adsorption process of PFAS may be impeded by the secretion of biofilms, which are composed of proteins and polysaccharides. Based on the analysis above, it can be the adsorption of PFAS by BAC is significantly inhibited by biofilms, according to another research. This provides theoretical direction for improving the removal effectiveness of PFAS in DWTPs.
研究领域:
环境科学
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水处理工程
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DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Caihong Liu,Xinyi Cheng,Jingjun Bo,Rui Gao,Ye Shen,Yue Zhi,Dan Song,Qiang He
The influence of coexisting calcium ions (Ca 2 + ) and fluctuating pH on the removal of diverse per- and polyfluoroalkyl substances (PFAS) by nanofiltration (NF) in complex natural waters remains unclear. This study systematically investigated the rejection of 14 representative PFAS as a function of Ca 2+ concentration (0, 0.1, 1.0 mM) and pH (4.5, 6.5, 8.0) in the presence of humic acid (HA). Results show that increasing Ca 2+ to 1.0 mM significantly enhanced the rejection of most PFAS by strengthening size exclusion, albeit at the cost of aggravated flux decline. More compellingly, raising the pH from 4.5 to 8.0 boosted the rejection of short-chain PFAS (e.g., PFBA and PFBS) by 15–20 % due to enhanced electrostatic repulsion. Mechanistic analysis revealed that Ca 2+ promoted the formation of a denser cake layer via “ion bridging” with HA and PFAS, whereas high pH intensified electrostatic repulsion between membrane and anionic PFAS by increasing the negative charge of the membrane surface. This work elucidates the intrinsic trade-off between rejection efficiency and membrane fouling governed by water chemistry, providing critical insights for optimizing NF processes to treat complex waters contaminated with emerging PFAS.
研究领域:
环境科学
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水处理技术
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膜科学
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新兴污染物
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PubMed
高影响因子
FOOD CONTROL
·
2017
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IF 3.496
Xiya Zhang,Qianqian Tang,Tiejun Mi,Sijun Zhao,Kai Wen,Liuchuan Guo,Jiafei Mi,Suxia Zhang,Weimin Shi,Jianzhong Shen,Yuebin Ke,Zhanhui Wang
To increase information content per screen, a dual-wavelength, homologous and high-throughput fluorescence polarization immunoassay (DWFPIA) for simultaneous detection of total aflatoxins (AFs) and family zearalenones (ZENs) was developed. Aflatoxin B 1 (AFB 1 ) and zearalanone (ZAN) were labeled with different fluoresceins, and then combined with corresponding broad-specific antibodies to develop the DWFPIA. Under optimal conditions, the half maximal inhibitory concentrations of the FPIA in buffer were 2.68 μg/L and 4.08 μg/L for total four AFs (the weight ratio of AFB 1 : Aflatoxin B 2 : Aflatoxin G 1 : Aflatoxin G 2 was 1: 1: 1: 1) and six ZEN analogs (the weight ratio of ZEN: ZAN: α-zearalenone: β-zearalenone: α-zearalanone: β-zearalanone was 1: 1: 1: 1: 1: 1) by mixing equal volumes (1: 1, v/v), respectively. The corresponding limit of detection values in maize flour samples were 4.98 μg/kg and 11.03 μg/kg, and the mean recoveries ranged from 78.6 to 103.6% with the coefficients of variation below 19.2%. The whole detection procedure, including sample preparation, took less than 30 min. Finally, the DWFPIA was applied to screen naturally contaminated maize flour samples, and the detection data were similar to those with HPLC-MS/MS.
研究领域:
食品科学
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生物化学
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毒理学
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DOI
高影响因子
TOXICOLOGY
·
2023
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IF 4.5
Congcong Zhao,Shaowei Wang,Yingna Zhai,Mengyun Wang,Yunbing Tang,Huitao Li,Young Jun Im,Ren-shan Ge
Per- and polyfluoroalkyl substances (PFAS) are persistent in the environment and may disrupt the endocrine system. Our previous study showed that perfluorooctanoic acid (PFOA, C8) and perfluorooctanesulfonic acid (PFOS, C8S) can inhibit 11β-hydroxysteroid dehydrogenase 2 (11β-HSD2) activity leading to an active glucocorticoid accumulation. In this study, we extended investigation for 17 PFAS, including carboxylic and sulfonic acids , with different carbon-chain lengths, to determine their inhibitory potency and structure-activity relationship in human placental and rat renal 11β-HSD2. C8-C14 PFAS at 100 μM significantly inhibited human 11β-HSD2 with a potency as C10 (half-maximal inhibitory concentration, IC 50 , 9.19 μM) > C11 (15.09 μM) > C12 (18.43 μM) > C9 (20.93 μM) > C13 (124 μM) > C14 (147.3 μM) > other C4-C7 carboxylic acids , and C8S > C7S = C10S > other sulfonic acids. For rat 11β-HSD2, only C9 and C10 and C7S and C8S PFAS exhibited significant inhibitory effects. PFAS are primarily mixed/competitive inhibitors of human 11β-HSD2. Preincubation and simultaneous incubation with the reducing agent dithiothreitol significantly increased human 11β-HSD2 but not rat 11β-HSD2, and preincubation but not simultaneous incubation with dithiothreitol partially reversed C10-mediated inhibition on human 11β-HSD2. Docking analysis showed that all PFAS bound to the steroid-binding site and carbon-chain length determined the potency of inhibition, with the optimal molecular length (12.6 Å) for potent inhibitors PFDA and PFOS, which is comparable to the molecular length (12.7 Å) of the substrate cortisol . The length between 8.9 and 17.2 Å is the probable threshold molecular length to inhibit human 11β-HSD2. In conclusion, the carbon-chain length determines the inhibitory effect of PFAS on human and rat 11β-HSD2, and the inhibitory potency of long-chain PFAS on human and rat 11β-HSD2 showed V-shaped pattern. Long-chain PFAS may partially act on the cysteine residues of human 11β-HSD2.
研究领域:
环境科学
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毒理学
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内分泌学
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分子生物学
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DOI
PubMed
高影响因子
Environmental Science-Processes & Impacts
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2023
·Vol. 25
·期 8
·1311-1321
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IF 5.5
Ke Min,Shenxi Deng,Zhao Shu,Yong Li,Bo Chen,Ming Ma,Qian Liu,Guibin Jiang
Elemental carbon (EC) and organic carbon (OC) exist ubiquitously and interact mutually in the environment. Simultaneous analysis of EC and OC will greatly advance our understanding of the behavior and fate of EC and OC, but is however still a great challenge due to the lack of suitable analytical tools. Here, we report a matrix-free laser desorption/ionization mass spectrometry (LDI-MS) method capable of simultaneous analysis of EC and OC by monitoring two independent groups of specific MS fingerprint peaks. We found that EC itself can generate carbon cluster peaks in the low mass range under laser excitation, and meanwhile it can also serve as a matrix to assist the ionization of OC in LDI-MS. By using per- and polyfluoroalkyl substances (PFASs) as a typical set of OC and carbon black (CB) as a model EC, we successfully monitored the adsorption process of PFASs on CB enabled by LDI-MS. We show that hydrophobic interaction dominates the sorption of PFASs to CB, which was affected by the functional groups and carbon chain length of PFASs. Furthermore, environmental substances in water such as humic acid (HA) and surfactants can significantly affect the adsorption of PFASs on CB probably by changing the adsorption sites of CB. Overall, we demonstrate that LDI-MS offers a versatile and high-throughput tool for simultaneous analysis of EC and OC species in real environmental samples, which makes it promising for investigating the environmental behaviors and ecological risks of pollutants.
研究领域:
环境科学
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分析化学
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DOI
PubMed
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
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2025
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IF 3.5
Zeng Fang,Zhang Shuyao,Lin Ting,Li Yiqun,Xiao Meng
A novel Cu catalyst immobilized on glycine-functionalized poly(vinyl chloride) (Cu@Gly-PVC) was synthesized conveniently. The as-prepared catalyst was fully characterized by FTIR, SEM, EDS, elemental mapping, XPS, TGA, ICP, and EA analysis. The Cu(II) ions were uniformly distributed on the as-prepared Gly-PVC matrix via coordinated by carboxylic groups in a bidentate bridging pattern. This catalyst can be used at ppm levels in water for alkyne–azide cycloadditions (CuAAC) reactions, producing high yields of 1,2,3-triazoles. The present methodology offers several merits such as low catalyst loading, high catalytic activity, excellent yields, short reaction times, environmentally friendly reactions, simple operations, and compatibility of wide range of substrates. Furthermore, the catalyst can be easily isolated from the reaction mixture through simple filtration and retains remarkable reusability and catalytic activity even after four consecutive reaction cycles. Graphical abstract
研究领域:
有机化学
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材料科学
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绿色化学
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DOI
高影响因子
TALANTA
·
2021
·
IF 6.057
Tong Chen,Xue Yang,Shuya Wang,Guangsan Song,Hongbin Zhou,Weijian Shen,Ling Gao
In order to solve the problems of using a large proportion of acetonitrile on the hydrophilic interaction liquid chromatography (HILIC) columns that was not environmentally friendly, and the poor acid and base resistance of traditional bonded silica columns, we reported a novel stationary phase of Au nanoparticles (Au NPs) covalently bonded to ionic liquid (ILs) bridged periodic mesoporous organosilicas (PMO) hydrophilic microspheres (PMO-ILs-Au NPs) for per aqueous liquid chromatography (PALC). The PMO hydrophilic microspheres were prepared by condensation of 1,3-bis(trimethoxysilylpropyl)imidazoliumchloride and 1, 2-Bis (triethoxysilyl) ethane and then modified with Au NPs the surface. The obtained materials were characterized by elemental analysis , FT-IR spectra, scanning electron microscope and transmission electron microscopy . The retention behavior was evaluated by investigating the effect of various chromatographic factors on the retention of different types of solutes. The retention mechanism of the stationary phases in PALC was a mixed type of anion-exchange and hydrophobic interaction. Compared with C 18 –SiO 2 column, the acid and base resistance of the stationary phase were greatly improved. Compared with the HILIC column and C 18 column, some hydrophilic compounds such as six organic acids and eight biogenic amines were baseline separated with the enhanced resolution of the PMO-ILs-Au NPs column under the PALC mode. The efficiency of the new column was significantly higher than that of the HILIC column. Furthermore, the analysis of PALC-triple quadrupole mass spectrometry was developed for simultaneous detection of eight biogenic amines. This method could improve detection efficiency, save reagent and reduce environmental pollution. PALC as a green chromatography analytical method was suitable for the replacement of HILIC.
研究领域:
分析化学
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材料科学
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生物医学
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DOI
PubMed
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2024
·
IF 3.8
Guiju Xu,Chunlei Yang,Hongwei Zhang,Baoyu Li
The routine monitoring of per- and polyfluoroalkyl substances (PFASs) in drinking water has become an important task in the field of public health. In this study, a fluorinated covalent organic framework (COF) was synthesized at room temperature using tetra-(4-aminophenyl) methane (TAM) and 2,3,5, 6-tetrafluoro-terephthalal (TFTA) as building blocks and named as TAM-TFTA-COF. The adsorption characteristics of PFASs on the TAM-TFTA-COF were investigated through adsorption model-fitting and molecular calculation. The TAM-TFTA-COF was served as the solid phase extraction (SPE) cartridge packing for the enrichment of PFASs. Combined with liquid chromatography–tandem mass spectrometry, the proposed method showed good linearity in the range of 1.25–375 ng·L −1 , low limits of detection (0.03–0.24 ng·L −1 ), and excellent intraday and interday precisions with RSD <10.3 %. Furthermore, this analytical method can be utilized for the determination of PFASs in tap water, spring water, and lake water with satisfactory accuracy.
研究领域:
环境科学
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分析化学
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DOI
PubMed
高影响因子
ACS Sensors
·
2025
·
IF 9.1
Yaming Hu,Wenshuo Xie,Zhizhi Wang,Jinlong Ma,Linlin Hou,Qi Wang,Feng Xiong,Guanglan Liao,Tielin Shi,Hu Long
The introduction of oxygen vacancies (OVs) into metal oxide micro/nanostructures significantly enhances both catalytic performance and electrical conductivity, thereby boosting their gas-sensing capabilities. However, conventional approaches for engineering oxygen vacancies typically require specialized equipment (e.g., autoclave reactors) and extreme operational conditions (e.g., high temperature and high vacuum), posing substantial challenges for practical applications. Herein, a novel single-step laser-induced technique is developed for fabricating CuOx-based room-temperature acetone sensors under ambient conditions. The technique enables mask-free fabrication of tunable sensing films spanning morphologies from porous networks to nanospheres by precisely modulating the film thickness. Furthermore, oxygen-vacancy self-doping is inherently coupled with the micro/nanostructure growth mechanism, bypassing conventional postsynthesis treatments while preserving process simplicity. The as-prepared CuOx gas sensors with distinct morphologies manifest exceptional room-temperature acetone sensing with a wide response range spanning 0.1–10 ppm. Comparative analysis of nanosphere-based gas sensors conclusively demonstrates that oxygen vacancies constitute a key structural determinant, enabling room-temperature sensing capability in CuOx-based sensors. Moreover, both gas sensors exhibit outstanding selectivity toward acetone against common interferents (NO2, H2, CO2, and CO) and a low detection limit, highlighting their potential for trace acetone gas detection applications.
研究领域:
材料科学
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气体传感技术
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纳米制造
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光学加工
·
环境监测
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Xin Song,Rongyu Wang,Xiao Wang,Haoyue Han,Zhaoyu Qiao,Xiaowei Sun,Wenhua Ji
Due to the environmental persistence and various health problems associated with per- and polyfluoroalkyl substances (PFASs), they have come under increased public scrutiny. However, the efficient extraction of PFASs from complex media remains challenging. Herein, an olefin-linked covalent organic framework (COF-CN) has been prepared via a Knoevenagel condensation reaction , followed by reduction using LiAlH 4 to form an amine-functionalized COF (COF-NH 2 ). The characterization results demonstrated that the crystal structure was maintained during the post-modification step. Isothermal and kinetic adsorption studies showed the higher affinity of COF-NH 2 toward PFASs. Based on density functional theory , the adsorption mechanism of the stable six-member-ring structure formed between COF-NH 2 and PFASs via hydrogen bonding was tentatively revealed. After optimizing the solid-phase microextraction parameters, legacy and emerging PFASs were efficiently extracted from fish using the COF-NH 2 coating, followed by detection using ultra-performance liquid chromatography-tandem mass spectrometry . The method exhibited ideal linearity, low limits of quantification, excellent precision, and high relative recoveries. Finally, the bioconcentration kinetics for goldfish was studied, which can provide a feasible platform for investigating the accumulate ion and toxicity of PFASs.
研究领域:
环境科学
·
分析化学
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DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2024
·
IF 5.7
Tong Chen,Ye Shu,Guangsan Song,Tao Liu,Jun Jiang,Bingxin Jiang,Xufang Zong,Zihan Zhao,Baixiu Zhao,Yichen Zeng
Background Hydrophilic Interaction Liquid Chromatography (HILIC) is an outstanding strategy for the challenging analysis of hydrophilic and polar components. Nevertheless, analysis under HILIC mode typically consumes 70%–95 % acetonitrile with the disadvantage of high analytical costs, being environmentally unfriendly and causing biohazards, which is not in line with the concept of green chromatography. Research has shown that Per Aqueous Liquid Chromatography (PALC) simultaneously emphasizes efficient analytical performance for hydrophilic analytes and green analytical concepts. The development of new PALC stationary phases with superior performance is necessary. Results In this paper, silanized silica was sequentially subjected to esterification reaction, polymerization reaction and covalent bonding through five steps to obtain SiO 2 -RHP-AuNPs material, which was prepared as a novel stationary phase for PALC. Comprehensive characterization of the materials by means of Fourier transform infrared spectroscopy, Transmission scanning electron microscope, Elemental analysis and Thermogravimetric analysis showed the successful bonding of the functionalized groups on the original silica. The polymeric stationary phase based on Radix hedysari polysaccharide and Au nanoparticles had higher density of hydroxyl and ester functionalized groups. The Au nanoparticles upgraded their mesoporous structure and thermal stability, providing exceptional chromatographic performance and selectivity for chromatographic analysis. The influence of mobile phase water content, salt concentration, pH and column temperature on the retention behavior was evaluated. The novel Column was found to exhibit a dual mechanism of hydrophobic interactions/ion exchange interactions in a mobile phase with high water content. Significance and novelty The separation efficiency and selectivity of SiO 2 -RHP-AuNPs columns for synthetic pigments and organic acids in PALC mode were superior to those of commercial HILIC and C 18 columns. In addition, a method for the determination of seven active ingredients in Fructus Ligustri Lucidi by SiO 2 -RHP-AuNPs column in PALC mode was developed. The method had good stability, reproducibility and accuracy, which was capable of realizing the quality evaluation of Chinese Materia Medicas.
研究领域:
分析化学
·
中药学
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产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2024
·
IF 10.8
Kun Wang,Xin Xiao,Zhengzheng Liu,Jing Wang,Xiangyu Zhu,Enhui Wu,Christopher P. Higgins,Baoliang Chen
Though long recognized as synthetic precursors to other poly- and perfluoroalkyl substances (PFASs), most poly- and perfluoroalkyl sulfonyl halides (PASXs) cannot be directly measured and have generally received minimal attention. Inspired by the redox reaction between sulfonyl halide groups and p-toluenethiol in organic chemistry, we developed a novel nontarget analysis strategy for PASXs by intergrating derivatization and specific fragment-based liquid chromatography-high resolution mass spectrometry screening for m/z 82.961 [SO2F–] and m/z 95.934 [S2O2–]. By using this strategy, we discovered 11 PASXs, namely, perfluoroalkyl sulfonyl fluorides (5), polyfluoroalkyl sulfonyl fluorides (2), unsaturated perfluoroalkyl sulfonyl fluoride (1), and perfluoroalkyl sulfonyl chlorides (3) in soil samples collected from an abandoned fluorochemical manufacturing park. These average ∑PASXs concentrations were 1120 μg kg–1 (range: 9.7–9860 μg kg–1), which were very likely to be the key intermediates and undesired byproducts of electrochemical fluorination processes. Spatial variation in the mass ratio of ∑PASXs to ∑PFSAs (range: 0.7–795%) also indicates their different transportation pathways. More importantly, the decline of PASXs and increase of perfluoroalkyl sulfonates (when compared to a prior study at this site) suggest the continued hydrolysis of PASXs and the relatively fast environmental transformation rates in the abandoned fluorochemical park soils. Overall, these findings demonstrated the utility of a novel nontarget analysis strategy, which may change most PASXs from inferred precursors to measured intermediates and further could be adapted for structures, distribution, and transformation studies of PFASXs in other matrices.
研究领域:
环境科学
·
分析化学
·
化工工程
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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）