ATMOSPHERIC ENVIRONMENT
·
2018
·
IF 3.708
Xiangguang Fang,Qi Wang,Zhen Zhao,Jianhui Tang,Chongguo Tian,Yiming Yao,Junchao Yu,Hongwen Sun
A total of 26 alternative and legacy perfluoroalkyl and polyfluoroalkyl substances (PFASs) were investigated in air collected above the Bohai and Yellow Seas during a research cruise between June 28 and July 15, 2016. ∑PFAS concentrations ranged from 70 pg m −3 to 430 pg m −3 (mean 230 ± 100 pg m −3 ). Trifluoroacetic acid (TFA, mean 120 ± 80 pg m −3 ) and 8:2 fluorotelomer alcohol (8:2 FTOH, mean 34 ± 46 pg m −3 ) were the predominating compounds of ionizable PFASs (i-PFASs) and neutral PFASs (n-PFASs), respectively. The contributions of C 4 and C 6 i-PFASs were higher than those of C 8 i-PFASs. Alternative substances, such as chlorinated 6:2 polyfluoroalkyl ether sulfonic acids (Cl-6:2 PFESA, mean 1.6 ± 1.2 pg m −3 ) and diPAPs (mean 1.6 ± 1.3 pg m −3 ), were only detected on the filter. The distribution coefficient of 10:2 FTOH was higher than 8:2 FTOH, which could be explained by the length of the carbon chain. The gas phase dry deposition velocities were simulated, and the values ranged from 0.08 ± 0.12 cm s −1 to 0.85 ± 0.28 cm s −1 . For i-PFASs and diPAPs, the estimated fluxes of the particle phase were higher than those of the gas phase. For n-PFASs and TFA, the gas phase deposition played a key role. The ∑PFASs dry deposition fluxes were 11–290 ng (m 2 d) −1 (mean 72 ± 67 ng (m 2 d) −1 ). The measurement of the concentrations in the gas and particle phases simultaneously provided a more comprehensive understanding of PFAS behaviours in air.
研究领域:
环境科学
·
化学
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Zhangtao Liu,Shuhan Fu,Yuhui Wang,Zhenyang Xu,Yueguang Chen,Ning Xiao,Shangyi Li,Tingting Zhang
A novel spin-state engineering strategy was developed via La doping to break the “oxo wall” and boost high-valent Co(IV)=O generation for efficient per- and polyfluoroalkyl substances (PFASs) degradation. This was achieved by constructing unsaturated CoO 3 single atoms anchored on La-doped MCM-48 (CoLa@MCM-48) via one-pot synthesis, which enabled synergistic activation of peroxymonosulfate and ozone. The optimized catalyst achieved 99.5 % degradation of PFASs substitute sodium p-perfluorous nonenoxybenzene sulfonate (OBS) in 30 min, while maintaining robust performance across diverse water matrices. The incorporation of La induces asymmetric lattice strain through its large ionic radius and spin-orbit coupling, transforming the Co coordination geometry from conventional octahedral symmetry to an unsaturated trigonal planar CoO 3 configuration with a high-spin state, thereby enhancing the 88.8 % generation of Co(IV)=O. This work establishes heteroatom-mediated spin-state engineering for designing high-performance non-radical catalysts to remediate recalcitrant pollutants.
研究领域:
环境催化
·
材料化学
·
污染控制化学
·
高级氧化技术
·
配位化学
·
表面科学
·
纳米催化
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Lingyue Zhang,Chu Tang,Dongbei Yue
The disposal and reduction of excess sludge is one of the most challenging aspects of wastewater treatment. Recycling excess sludge as functional materials is an innovative approach that has garnered broad attention, as it can address environmental concerns and reduce the consumption of valuable materials. However, this approach is still challenging due to the low mixed liquor suspended solids in sewage treatment plants and the high synthesis costs involved. In this study, we proposed the application of excess sludge from an on-site leachate treatment plant for the efficient removal of perfluoroalkyl substances (PFASs) from wastewater. A simple thermal treatment was conducted and the obtained sludge-based adsorbents enable effective PFASs removal. Through the use of low field nuclear magnetic resonance and structural characterizations, results demonstrated that denitrifying sludge had higher hydrophobicity and specific surface area (30.85 m 2 /g) than nitrifying sludge, resulting in enhanced PFASs adsorption capacity and initial adsorption rates. Kinetic and isotherm simulations indicated that the adsorption was efficient and controlled by surface and intraparticle diffusion. Characterization and regulation results showed that the adsorption was dominated by hydrophobic and electrostatic interactions. These findings suggest a promising recycling approach of excess sludge while elucidating the dominant mechanisms involved.
✓ 已验证
产品关联
DOI
高影响因子
ACS ES&T Water
·
2023
·
IF 5.3
Zhuoran Feng,Hangjia Zhao,Xiaoyue Ji,Xiangni Lu,Xueyan Li,Ying Zhao,Wei Wang,Jun Ma,Zhiqiang Sun
PFAS adsorption by nanoparticles (NPs) is an important determinant of their fate in the environment. A deeper insight into their interaction, especially under complex conditions, is still lacking. Here, we first found that the inherent properties of PFASs (e.g., concentration and chain length) strongly determine their interaction with carbon NPs (CNPs) in aquatic environments under different ionic strengths. With an identical increase in the ionic strength, more enhancement (255%) in the association ability of CNPs was achieved with long-chain PFAS at a high initial concentration (10 mg/L) compared with that at a lower initial concentration (6%, 0.1 mg/L), while the situation of short-chain PFASs was the opposite (36 vs 557%). The effect of ionic strength on hydrophobic interactions was proved to be the origin of the above phenomenon. A high ionic strength induces the formation of hydrogen bond networks of water molecules, which enhances hydrophobic interactions. However, when the PFAS concentration is lower, hydrogen bond networks are more difficult to organize around PFAS molecules, weakening the positive effect of the ionic strength. Moreover, the solvation of long-chain PFASs in water is thermodynamically unfavorable at high ionic strength, making them “easily excluded”. This is a brand new insight into the interaction between PFASs and NPs under complex aquatic conditions, which will be meaningful to predict the fate of PFASs in the environment.
研究领域:
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
·
2025
·
IF 4.6
Chunlan He,Yunxi Tang,Shiqi Chen,Siyu Huang,Youming Xiong,Yamin Bai,Jingbing Xu,Yi Zhong,Hong Cheng,Lei Wang,Zhong Chen,Changjun Hou
Per- and polyfluoroalkyl substances (PFASs) have been widely detected in animal samples. But the fats, indispensable tissue in animals, can seriously hinder the PFASs extraction due to their nature of complex, unbreakable, and concretionary. To address this, a new sample preparation method, combining the advantages of ASE and QuEChERS, is proposed. Firstly, the extraction conditions of new method are optimized as co-solvent of MeCN+H 2 O, temperature of 100 °C, and time of 30 min. The MeCN performs better than MeOH because the MeOH will bring some impurities (phospholipids). The H 2 O under high temperature plays important dual functions of digestion and organic solvent. The exothermic reaction of MgSO 4 also enhance the PFASs extraction. Next, 15 animal samples are screened by both the new ASE+QuEChERS and traditional QuEChERS. The lower and upper limits of quantitation are 0.25 ng g −1 and 25.00 ng g −1 , respectively. Nine PFASs are detected in five positive simples. The new method can improve the total concentration of PFASs by range from 6 % to 64 %. Lastly, both the new ASE+QuEChERS and traditional QuEChERS methods are validated based on 10 relevant food simples. This study provides a simple, efficient and practical method for extraction of PFASs from animal samples.
研究领域:
分析化学
·
环境科学
·
食品安全
·
毒理学
✓ 已验证
产品关联
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2024
·
IF 9.7
Zhen-Zhu Liu,Chang-Gui Pan,Feng-Jiao Peng,Jun-Jie Hu,Hong-Ming Tan,Rong-Gui Zhu,Chao-Yang Zhou,Hao Liang,Kefu Yu
The present study successfully synthesized a novel biochar adsorbent (M−L−BC) using litchi seed modified with zinc chloride for PFASs removal in water. M−L−BC greatly enhanced removal of all examined PFASs (>95 %) as compared to the pristine biochar (<40 %). The maximum adsorption capacity was observed for PFOS, reaching 29.6 mg/g. Adsorption kinetics of PFASs followed the pseudo-second-order model (PSO), suggesting the predominance of chemical adsorption. Moreover, characterization and density functional theory (DFT) calculations jointly revealed involvement of surface complexation, electrostatic interactions, hydrogen bonding, and hydrophobic interactions in PFAS adsorption. Robust PFAS removal was demonstrated for M−L−BC across a wide range of pH (3–9), and coexisting ions had limited impact on adsorption of PFASs except PFBA. Furthermore, M−L−BC showed excellent performance in real water samples and retained reusability after five cycles of regeneration. Overall, M−L−BC represents a promising and high-quality adsorbent for efficient and sustainable removal of PFASs from water.
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
ECOLOGICAL INDICATORS
·
2015
·
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
SCIENCE OF THE TOTAL ENVIRONMENT
·
2023
·
IF 9.8
Fan Dong,Fan Ge,Xinting Zhao,Daming Sun,Suyu Ren,Yan Wang,Feng Tan
Extensive use of per- and polyfluoroalkyl substances (PFASs) has resulted in their widespread presence in natural waters. Concern for public health requires reliable measurement methods for determining their distribution and risks. Here, a sampling method based on diffusive gradients in thin films (DGT) was developed for measuring PFASs in drinking water sources. Fluorinated graphite (FG) particles were used to prepare the DGT binding gel for selective enrichment of trace PFASs in an aqueous environment. The FG-DGT method did not show sensitivity to relevant environmental parameters including pH (5.0–9.0), ionic strength (0.001–0.5 M), or DOM concentration (0–30 mg/L). The FG-DGT had enough capacity for deployment of up to four months. Six traditional and emerging PFASs including PFOS, PFOA, PFHpA, PFHxS , PFNA, and 6:2 FTSA at the ng/L level were detected in two major reservoirs serving as public drinking water sources by FG-DGT method coupled with liquid chromatography tandem mass spectrometry (LC-MS/MS). PFOA appeared at the highest observed concentrations in the drinking water sources. The research demonstrates that FG-DGT is an effective and efficient tool for monitoring PFASs in drinking water.
研究领域:
环境科学
·
分析化学
·
水质
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2025
·
IF 11.3
Zhuoran Feng,Yaoxuan Fu,Jiahui Li,Xiangni Lu,Shuo Wang,Yidi Chen,Wei Wang,Zhiqiang Sun,Jun Ma
The UV/sulfite advanced reduction process (ARP) holds promise for the removal of per- and polyfluoroalkyl substances (PFASs) by a hydrated electron (eaq–)-induced H/F exchange process under anoxic conditions. Traditionally, the presence of coexisting nitrate in water has always been regarded as a major inhibitory factor for PFASs defluorination. However, this study observed an unexpected promotive effect of nitrate on defluorination, challenging the previous phenomenon. Notably, the addition of 100 μM nitrate resulted in a remarkable 54% enhancement in PFOA defluorination. A novel mechanism was discovered that nitrate-derived reactive nitrogen species (RNS) activated the decarboxylation–hydroxylation–elimination–hydrolysis (DHEH) process, an important degradation pathway for PFASs in UV/sulfite ARP. Induced by eaq–, the PFAS molecule first became a perfluorinated radical and then was transformed into unstable perfluorinated alcohol by reacting with water. Due to the high reactivity driven by unpaired electrons of RNS, water molecules were destabilized with the H–O bond stretched from 0.98 to 1.04 Å. This effectively enhanced the spontaneity of the reaction between perfluorinated radical and water molecules and consequently made the whole DHEH process more thermodynamic favorable (ΔG, −23.53 → −376.28 kJ/mol). Such a process breaks through the view that the nitrate directly reacts with eaq– to affect PFASs defluorination in ARP systems. This finding offers an innovative perspective for optimizing PFAS defluorination by strategically regulating nitrate levels in water bodies.
研究领域:
环境科学
·
化学
✓ 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
Water
·
2024
·Vol. 16
·期 11
·1513
·
IF 3
Jingqi Huang,Zhen Zhao,Jing Liu,Shiyue Li
Jiangsu High-Tech Fluorochemical Industrial Park in Changshu City, Jiangsu Province, is the largest fluorochemical industrial park in Asia. The occurrence of per- and polyfluoroalkyl substances (PFASs) in surface water and widespread local plants was investigated in Jiangsu High-Tech Fluorochemical Industrial Park. Thirty-two target PFASs were detected in dissolved-phase, particle-phase and plant samples. The concentrations of total PFASs ranged from 1650 to 8250 ng/L in the dissolved-phase samples, 132 to 6810 ng/g dw in the particle-phase samples and 25.8 to 9460 ng/g dw in different plant tissues. Perfluorohexanoic acid (PFHxA), Perfluorooctanoate acid (PFOA) and 6:2 fluorotelomer carboxylic acid (6:2 FTCA) were predominant PFASs and contributed 80−91% to ΣPFAS in water samples. A total of 67 emerging PFAS were identified in all samples using nontargeted analysis.Typha orientalisshowed better accumulation ability, with an average ΣPFAS concentration of 3450 ng/g dw and the highest root concentration factor (RCF) of 171.Typha orientalis,Eichhornia crassipesandAlternanthera sessilishave potential for use in PFAS phytostabilization.
研究领域:
环境科学
·
化学
·
生态学
·
毒理学
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENT INTERNATIONAL
·
2024
·
IF 10.3
Qiyu Wang,Xueyan Gu,Limin Mo,Nannan Wan,Liu Wu,Shuai Liu,Miao Zhang,Mingqi Li,Xi Liu,Yu Liu
The biotoxicity of perfluoroalkyl and polyfluoroalkyl substances (PFASs) to aquatic organisms has been widely concerned. However, studies on toxic effects of PFASs are usually evaluated directly by using laboratory exposure rather than laboratory validation based on data obtained in the field. In this study, wild catfish ( Silurus meridinalis ) was explored on the relationship between PFASs bioaccumulation and lipid disorders. Nine and thirteen lipid metabolites were significantly associated with perfluorooctane sulfonate (PFOS) and 6:2/8:2Cl-PFESA (trade name F-53B) exposures, respectively; and the correlated lipid metabolites were the fatty acid (FA) and conjugates, FA esters, steroids, and glycerophosphate subclasses. The effects of PFASs on lipid metabolism of fish and its mechanism were further analyzed through exposure experiments. Zebrafish ( Danio rerio ) of different sexes underwent PFOS and F-53B exposures for 21 days at 100 ng/L and 100 μg/L. By determining gene expression levels, hepatic lipid contents, and histopathological change, the adverse effects order on lipid metabolism in male or female was 100 μg/L F-53B > 100 μg/L PFOS > 100 ng/L F-53B > 100 ng/L PFOS; the stress response in male was more intensive than that in female. PFOS and F-53B activated the peroxisome proliferator-activated receptor pathway, promoting the processes of FA and total cholesterol (T-CHO) transport, FA β -oxidation, FA synthesis, and finally induced FA and T-CHO transportation from blood into liver, then accelerated FA to FA ester transformation, and CHO into steroids. Laboratory experiments confirmed the field analysis. This study innovatively explored the adverse effects of PFOS and F-53B on lipid metabolism and their mechanisms at field and laboratory levels, highlighting concerns regarding PFASs health risks.
研究领域:
环境毒理学
·
水生生物学
·
分子生物学
✓ 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）