JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Shan Yao,Jieying Lin,Shaoxiong He,Yang Bai,Mingge Jin,Feng Zhu,Jingyun Fang,Mengye Wang
Perfluoroalkyl substances (PFAS) are environmentally persistent, bioaccumulative and toxic pollutants. However, thorough degradation of PFAS remains exceptionally difficult due to the high dissociation energy of the C-F bond. Here, we report a viable strategy to markedly degrade PFAS completely by capitalizing on a harmless polytetrafluoroetylene (PTFE) as a piezocatalyst. Remarkably, perfluorooctanoic acid (PFOA), as one of the widely used PFAS, was almost completely removed with a degradation rate of 93.4 % and a defluorination rate of 91.5 % by the ultrasound excitation of PTFE for 1 h. On the basis of the intermediate analysis, we proposed an oxidation mechanism for the piezocatalytic PFOA degradation. Furthermore, this strategy was also efficient for the degradation of perfluoroheptanoic acid (PFNA), perfluorooctane sulfonate (PFOS) and hexafluoropropylene oxide dimer acid (Gen-X), implying its effectiveness to remediate water containing multiple PFAS. Impressively, due to the diverse energy gap between HOMO and LUMO energy of various PFAS, the degradation reaction kinetics of different PFAS are of significant difference. This study provides the deep insight into the piezocatalytic technique for the remediation of persistent and disparate PFAS.
研究领域:
环境科学
·
材料科学
✓ 已验证
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
✓ 已验证
DOI
高影响因子
Journal of Hazardous Materials Advances
·
2023
·
IF 0
Jiaoxia Sun,Hong Xiang,Xueting Jiang,Xi Wang,Xue Luo,Jiang Fu,Jianxin Fan
Perfluoroalkyl substances (PFAS) and novel PFAS are continuously detected in soil environments and have attracted increasing attention. The presence of microplastics (MP) in soil systems is of increasing concern worldwide. However, the effects of MP on PFAS adsorption by soil systems remain largely unexplored. In this study, we compared the adsorption behavior of four PFAS on polyamide microplastics (PAMP), polyamide microplastic - soil mixtures (PAMP+soil), and soil to investigate the effects of MP on the adsorption of PFAS in soil. The results show that the four PFAS Perfluorooctanoic acid (PFOA), 6:2 fluorotelomer sulfonic acid (6:2FTSA), Perfluorohexanesulfonate (PFHxS) and Perfluorinated (2-methyl-3-oxohexanoic acid) (GenX) present different adsorption behaviors onto PAMP, PAMP+soil and soil due to their different physicochemical properties. However, similar laws are founded that the adsorption capacity of PAMP, with respect to the four PFAS, is stronger than that of PAMP+soil (20–56 times), followed by that of soil (72–122 times). PAMP amends into soil greatly inhibits the adsorption capacity of PAMP because their surfaces are covered with soil particles or biofilms. The inhibition rate decreases with increasing PAMP dosage. However, the addition of PAMP to soil significantly enhances the adsorption of PFAS compared with that of soil alone. This enhancement indicates that the input of MP into the soil might reduce the mobility of PFAS by improving the adsorption capacity of the soil. Furthermore, the co-culture time of PAMP and soil mixture has a slight impact on adsorption, suggesting that the effect of MP on soil adsorption of PFAS is almost stable. The findings of this study contribute to the understanding of the effects of PAMP in soil on the environmental behavior of PFAS and provide a valuable reference for evaluating the potential risk posed by the co-existence of MP and organic contaminants in soil ecosystems.
研究领域:
环境科学
·
污染生态学
✓ 已验证
DOI
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2022
·
IF 7.926
Mingxiang Liu,Wei Chen,Jiawei Fu,Anqi Wang,Mingmei Ding,Lei Zhang,Le Han,Li Gao
Emerging contaminants (ECs) in water, such as per- and polyfluoroalkyl substances (PFASs), require more efficient separation technology for water treatment . Although nanofiltration (NF) has exhibited the potential to remove small organic molecules, enhancing water permeance without sacrificing the rejection of the membrane is still a big challenge. Herein, we fabricate a novel thin-film composite (TFC) membrane by introducing a hyaluronic acid (HA) interlayer . The hydrogen bonds between HA and amine monomers depress the mass transfer of piperazine, which is beneficial for constructing a thinner and denser polyamide (PA) layer. As a result, we finally obtained a novel TFC membrane with a PA layer with a more negative surface, reduced thickness, crumpled structure and higher degree of cross-linking. Moreover, the obtained TFC membrane exhibits an excellent water permeance of 29.53 L m −2 h −1 bar −1 and high rejection for Na 2 SO 4 (94.90 %) and perfluorohexane sulfonic acid (PFHxS) (93.4 %). In light of the low cost and ease of performance, our study proposes a new, green strategy for fabricating TFC NF membranes for environmental water treatment that could feasibly be extended to industrial applications.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
ECOLOGICAL INDICATORS
·
2015
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IF 3.444
Yanjie Qi,Shibin Hu,Shouliang Huo,Beidou Xi,Jingtian Zhang,Xiaowei Wang
Sediment samples were collected from the Chaohu Lake basin to investigate the spatial distribution and historical deposition behaviors of 17 perfluoroalkyl substances (PFASs). Concentrations of the total PFASs (∑PFASs) in limnetic sediments ranged from 0.719 to 2.429 ng/g dry weight (dw), with an average of 1.449 ng/g dw. A clear gradient in the spatial distribution was observed from west to east in surface sediments of Lake Chaohu. Perfluorooctane sulfonic acid and perfluorooctanoic acid were predominant in limnetic sediments, with an average of 0.383 and 0.275 ng/g dw, respectively. The ∑PFASs concentrations in riverine sediments were the highest in the Shiwuli River, followed by the Nanfei River. PFASs in riverine sediments indicated that industrial discharge and urban runoff played key roles in PFAS distribution and pollution levels. In vertical profiles, concentrations of the ∑PFASs and PFAS congeners in three sediment cores generally increased with decreasing depths, indicating that the input history of the ∑PFASs could be attributed to the development of industrialization and urbanization in the Chaohu Lake basin. The correlations between PFASs and sedimentary characteristics, organic carbon, nutrients and inorganic salts suggested that both hydrophobic and electrostatic effects played important roles in PFAS distribution and pollution levels in sediments of Lake Chaohu.
研究领域:
环境科学
·
生态学
✓ 已验证
产品关联
DOI
高影响因子
WATER RESEARCH
·
2024
·
IF 11.4
Xin Huang,Junhao Huang,Kaiyun Wang,Mingming Hao,Mengze Geng,Baoyou Shi,Chengzhi Hu
Owing to the persistence and increasingly stringent regulations of perfluoroalkyl substances (PFAS), it is necessary to improve their adsorption capacities using activated carbon (AC). However, their adsorption capacities are suppressed by dissolved organic matter (DOM). In this study, two ACs modified with organic silicon (C-OS) and inorganic silicon (C-IS) were synthesized and used for the adsorption of PFAS in raw water (RW). The results showed that the PFAS adsorption capacity of C-IS was much less influenced by DOM than that of the original AC (C-virgin). In RW, perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS) adsorption capacities on C-IS were 15.08 and 3.65 times higher than those on C-virgin, respectively. DOM had less influence on the PFOA and PFOS adsorption kinetics of C-IS than C-OS and C-virgin. Under multi-PFAS condition, C-IS also exhibited slower desorption of short-chain PFAS and breakthrough in batch and column tests, respectively. Characterization of the ACs before and after adsorption and independent gradient modelling indicated that hydrogen bond interactions between the O-Si of C-IS and the –COOH or –CSO 3 H groups of PFAS contributed to PFAS adsorption. Density functional theory calculations demonstrated that the adsorption energy of C-IS was much lower than that of C-OS and C-virgin. The arrangement of PFAS molecules on C-OS was chaotic owing to the hydrophobic siloxane chain, whereas the arrangement of PFAS on C-IS was orderly in multi-layer or semi-micelle status and more favorable to PFAS adsorption. This study provides a new strategy for avoiding adverse effects of DOM on PFAS adsorption.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Anlin Xu,Zihao Song,Zhiyi Zhou,Pu Yang,Qiqi Zhang,Yunhai Zhang,Yongjun Zhang
Per- and polyfluoroalkyl substances (PFASs) have been widely found in water bodies and may generate negative impacts on the ecosystem. Eectrocoagulation (EC) with a zinc anode is an effective technology to remove PFASs but the dominating interaction forces between zinc flocs and PFASs are still not well elucidated. In this study, we used hexafluoropropylene oxide trimer acid (HFPO-TA), a new perfluorooctanoic acid substitute, as a model to investigate the influence of EC operational parameters on its removal efficiency, including the current density, the pH value, and the electrolyte type. 99 % removal of 40 μM HFPO-TA were achieved in 3-h at optimal conditions. The extended Derjaguin-Landau-Verwey-Overbeek (XDLVO) theory was innovatively applied to reveal the interfacial free energies between zinc flocs and HFPO-TA and other PFASs. It was found that the hydrophobic force can significantly promote the adsorption of HFPO-TA on the surface of zinc flocs and a strong correlation may exist between the calculated total interfacial free energies and the pseudo-first-order kinetic constants of removing PFASs. FT-IR spectra indicated the specific interactions occurring between carboxylate head groups and zinc flocs. These findings advance the mechanistic understanding of PFASs removal by metal flocs and could support the development of electrocoagulation for removing PFASs.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2022
·
IF 10.753
Ruya Chen,Xin Huang,Guiwei Li,Ying Yu,Baoyou Shi
Granular activated carbon (GAC) adsorption is one of the best available technologies for removing perfluoroalkyl substances (PFASs) from drinking water . However, GAC processes in full-scale drinking water treatment plants frequently encounter unstable, even negative removal efficiency on PFASs due to the lack of understanding between the GAC characteristics and the PFASs polluted water quality conditions. In this study, the scenarios of raw water pre-chlorination and emergency contamination by multiple PFASs were simulated to evaluate the PFASs control performance by in-service GAC with different properties and ages. The results showed that the adsorption of a relatively longer-chain PFAS by the in-service GAC can be achieved by replacing the pre-adsorbed natural organic matter (NOM). The increased lower molecular weight NOM after pre-chlorination could compete with PFASs for adsorption sites and exacerbate the pore blockage, thus significantly weakening the PFASs removal ability of in-service GAC. When multiple PFASs entered the water by emergency contamination, the PFASs with stronger hydrophobicity could replace the PFASs with less hydrophobicity that had previously been adsorbed on GAC. GAC with a higher proportion of micropores had a lower risk of PFASs leakage facing the water quality changes.
研究领域:
环境科学
·
水处理工程
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Shu-Fan Li,Tong-Tong Liu,Lang-Jie Ye,Jian Su,Gen Zhang
The regulation of metal–organic framework (MOF) structures for the enhanced removal of perfluoroalkyl and polyfluoroalkyl substances remains a significant challenge. Herein, employing a topology regulation strategy, we synthesized two Zr-MOFs composed of identical inorganic and organic components and investigated their removal efficiency with perfluorooctanoic acid (PFOA). The resultant Zr-MOF-1, characterized by the sqc topology, demonstrated an absorption capacity for PFOA nearly five times greater than that of Zr-MOF-2, which featured the scu topology. The adsorption capacity of Zr-MOF-1 for PFOA reached 335.4 mg/g, attributed to a synergistic mechanism encompassing both chemical and physical absorption. This study illuminates the precise regulation of the absorption performance by structural frameworks.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2024
·
IF 8.2
Shuai Sun,Mengyuan Liang,Deling Fan,Wen Gu,Zhen Wang,Lili Shi,Ningbo Geng
A total of 17 groups of wastewaters from the chemical industrial parks and matched receiving river waters were collected in the east of China. The measured total concentrations of 21 analyzed PFAS analogues (∑ 21 PFAS) in the influents and effluents of the wastewater treatment plants (WWTPs) were in the range of 0.172–20.6 μg/L (mean: 18.2 μg/L, median: 3.9 μg/L) and 0.167–93.6 μg/L (mean: 10.8 μg/L, median: 1.12 μg/L), respectively, which were significantly higher than those observed in the upstream (range: 0.0158–7.05 μg/L, mean: 1.09 μg/L, median: 0.482 μg/L) and downstream (range: 0.0237–1.82 μg/L, mean: 0.697 μg/L, median: 0.774 μg/L) receiving waters. Despite the concentrations and composition profiles of PFAS varied in the water samples from different sampling sites, PFOA was generally the major PFAS analogue in the research areas, mainly due to the history of PFOA production and usage as well as the specific exemptions. The calculated concentration ratios of the short-chain PFCAs and PFSAs to their respective predecessors (PFOA and PFOS) in most of the samples far exceeded 1, indicating a shift from legacy PFOA and PFOS to short-chain PFAS in the research areas. Correlation network analysis and the calculated concentration ratios of PFAS in the effluents versus influents indicated transformation may have occurred during the water treatment processes and PFAS could not be efficiently removed in the WWTPs. Wastewater discharge of chemical industrial parks is a vital source of PFAS dispersed into the aquatic environment.
研究领域:
环境科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Xiaojing Tang,Guansheng Liu,Dongliang Wang,Hua Zhong
This study evaluates the methylene blue method for rapid and cost-effective analysis of perfluoroalkyl substances (PFAS). By employing three perfluorosulfonic acids (PFSAs) (perfluorooctanesulfonic acid (PFOS), perfluorohexanesulfonic acid (PFHxS) and perfluorobutanesulfonic acid (PFBS)), three perfluorocarboxylic acids (PFCAs) (perfluorooctanoic acid (PFOA), perfluorohexanoic acid (PFHxA) and perfluorobutanoic acid (PFBA)) and two non-fluorinated compounds (sodium 1-octanesulfonate (SOS) and octanoic acid (OA)), the impact of PFAS structure, specifically polar group type, carbon chain length and fluorine substitution, on the efficacy of the method was assessed. The results showed that PFSAs produced reliable calibration curves (R 2 > 0.99) across all pH levels due to strong dissociation of the -SO 3 H group. In contrast, PFCAs exhibited pH-sensitive performance in that PFOA (C8) showed good linearity (R² > 0.99) at pH ≥ 4, while shorter-chain PFHxA (C6) and PFBA (C4) had poor linearity for all of the pHs tested (1.6–10.0, R² < 0.95). Hydrophobicity-driven partitioning of methylene blue active substance (MBAS) into chloroform was critical, with long-chain PFAS (e.g., PFOS, PFOA) showing stable absorbance despite that the volume of washing solution increased up to 20 mL. The method was ineffective for SOS and OA, which are non-fluorinated analogs of PFOS and PFOA. The modified MB method developed in this study provides high-quality calibration curves for PFSAs and long-chain PFCAs, with a quantification limit as low as 0.03 mg/L, offering a rapid and cost-effective alternative to HPLC-MS for analysis of some PFAS compounds.
研究领域:
环境科学
·
化学分析
·
毒理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
WATER RESEARCH
·
2021
·
IF 11.236
Ruya Chen,Guiwei Li,Yitian He,Linlin Pan,Ying Yu,Baoyou Shi
Perfluoroalkyl substances (PFASs) can occur in water sources, pass through drinking water treatment plants (DWTPs), drinking water distribution systems (DWDSs), to the consumer taps. This investigation was carried out to present the transportation behaviors of 17 PFASs, involving seven DWTPs with different water sources, raw water transportation modes, treatment processes, and DWDS structures in eastern and northern China. The results showed that the long-distance raw water transportation pipelines removed a certain extent of PFASs from raw water, probably due to the accumulation of loose deposits. The long-distance, open-channel South-to-North water diversion increased PFAS contamination risk. In the DWTPs, granular activated carbon (GAC) adsorption and ultraviolet radiation removed less than 25% of PFASs, but ozonation-biological activated carbon (O 3 -BAC) was superior to GAC alone in removing PFASs. Loose deposits couldsignificantly influence PFAS accumulation and release within branch-structured DWDSs. In loop-structured DWDSs, finished water with different PFAS characteristics could mix along the pipeline, with the corresponding DWTP as the center, ultimately forming a relatively uniform distribution in the entire DWDS.
研究领域:
环境科学
·
公共卫生
✓ 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）