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Payne M, Kleywegt S, Ng CF. Industrial sources of per- and polyfluoroalkyl substances (PFAS) to a sewershed in Ontario, Canada. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:16086-16091. [PMID: 38316740 DOI: 10.1007/s11356-024-32206-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Accepted: 01/22/2024] [Indexed: 02/07/2024]
Abstract
Per- and polyfluoroalkyl substances (PFAS) are ubiquitous in the environment despite global regulatory action to restrict their use in industrial processes and products. The objective of this reconnaissance sampling was to understand current industrial use and ongoing sources of PFAS in Ontario. Fourteen PFAS were analyzed in effluents from four sectors: electroplaters, laundry and carpet cleaners, landfills, and circuit board manufacturers that discharge to sewersheds connected to wastewater treatment plants. Maximum concentrations were detected in carpet cleaning wastewater: 79,000 ng/L for perfluorohexane sulfonate (PFHxS), 26,000 ng/L perfluorooctane sulfate (PFOS), and 9400 ng/L perfluorooctanoic acid (PFOA). Total summed PFAS (∑PFAS14) concentrations were highest in laundry and carpet cleaners > electroplaters > landfill leachate > circuit boarders. These results indicate that PFAS continue to be used in select manufacturing and processing facilities and that the elevated levels are associated with past and current uses in commercial products.
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Affiliation(s)
- Mark Payne
- Public Works, The Regional Municipality of York, Newmarket, ON, Canada.
| | - Sonya Kleywegt
- Ontario Ministry of the Environment, Conservation and Parks, Toronto, ON, Canada
| | - Chi-Fai Ng
- Public Works, The Regional Municipality of York, Newmarket, ON, Canada
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2
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Jia Y, Shan C, Fu W, Wei S, Pan B. Occurrences and fates of per- and polyfluoralkyl substances in textile dyeing wastewater along full-scale treatment processes. WATER RESEARCH 2023; 242:120289. [PMID: 37413748 DOI: 10.1016/j.watres.2023.120289] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 05/22/2023] [Accepted: 06/28/2023] [Indexed: 07/08/2023]
Abstract
Industrial wastewater is a substantial source of per- and polyfluoroalkyl substances (PFASs) in the environment. However, very limited information is available on the occurrences and fates of PFASs along industrial wastewater treatment processes, particularly for the textile dyeing industry where PFASs occur extensively. Herein, the occurrences and fates of 27 legacy and emerging PFASs were investigated along the processes of three full-scale textile dyeing wastewater treatment plants (WWTPs) based on UHPLC-MS/MS in combination with self-developed solid extraction protocol featuring selective enrichment for ultrasensitive analysis. The total PFASs ranged at 630-4268 ng L-1 in influents, 436-755 ng L-1 in effluents, and 91.5-1182 μg kg-1 in the resultant sludge. PFAS species distribution varied among WWTPs, with one WWTP dominated by legacy perfluorocarboxylic acids while the other two dominated by emerging PFASs. Perfluorooctane sulfonate (PFOS) was trivial in the effluents from all the three WWTPs, indicating its diminished use in textile industry. Various emerging PFASs were detected at different abundances, demonstrating their use as alternatives to legacy PFASs. Most conventional processes of the WWTPs were inefficient in removing PFASs, especially for the legacy PFASs. The microbial processes could remove the emerging PFASs to different extents, whereas commonly elevated the concentrations of legacy PFASs. Over 90% of most PFASs could be removed by reverse osmosis (RO) and was enriched into the RO concentrate accordingly. The total oxidizable precursors (TOP) assay revealed that the total concentration of PFASs was increased by 2.3-4.1 times after oxidation, accompanied by formation of terminal perfluoroalkyl acids (PFAAs) and degradation of emerging alternatives to various extents. This study is believed to shed new light on the monitoring and management of PFASs in industries.
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Affiliation(s)
- Yuqian Jia
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing, 210023, China
| | - Chao Shan
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing, 210023, China; Research Center for Environmental Nanotechnology (ReCENT), Nanjing University, Nanjing, 210023, China
| | - Wanyi Fu
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing, 210023, China
| | - Si Wei
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing, 210023, China
| | - Bingcai Pan
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing, 210023, China; Research Center for Environmental Nanotechnology (ReCENT), Nanjing University, Nanjing, 210023, China.
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3
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Chen F, Li Y, Zhu Y, Sun Y, Ma J, Wang L. Enhanced electrokinetic remediation by magnetic induction for the treatment of co-contaminated soil. JOURNAL OF HAZARDOUS MATERIALS 2023; 452:131264. [PMID: 36989789 DOI: 10.1016/j.jhazmat.2023.131264] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 03/15/2023] [Accepted: 03/21/2023] [Indexed: 06/19/2023]
Abstract
The electroplating industry site is an important reservoir of per- and poly-fluoroalkyl substances (PFASs) and heavy metals. In this work, a novel electrokinetic in-situ chemical oxidation system was established to restore an actual soil co-contaminated with high concentrations of heavy metals (Cr, Cu, Zn and Ni) and PFASs. Potassium persulfate (PS, K2S2O8) and industrial waste steel slag were used as the oxidant and activator, respectively. The steel slag was evenly added in the soil, while PS was dosed in the cathode chamber. Citric acid fermentation broth produced by Aspergillus niger was added in the anode chamber to act as the metal chelator. A periodic alternating magnetic field was employed to enhance the catalytic performance of steel slag for PS. After 15-day treatment, 86.7% of PFASs and 87.2% of heavy metals were removed without PFASs accumulation in the electrolyte, with a defluorination percentage of 79.2%. The remediated soil had no phytotoxicity for wheat seed growth based on 7-day cultivation results. The quality of remediated soil could reach the national Class II criteria for residential use. Electron paramagnetic resonance spectroscopy analysis demonstrated that SO4•- and •OH were the major oxidative radicals responsible for PFASs degradation. Adding steel slag in the soil performed better than that in the cathode chamber based on pollutant removal and alleviating soil acidification. Magnetic induction could enhance PS activation by promote the corrosion of steel slag and thermal activation, thus increasing electrical current and electroosmotic flow, enhancing the transport of citric acid and PS, significantly improving the removal efficiency of heavy metals and PFASs.
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Affiliation(s)
- Fu Chen
- School of Public Administration, Hohai University, Nanjing 211100, China.
| | - Yuhang Li
- School of Public Administration, Hohai University, Nanjing 211100, China
| | - Yanfeng Zhu
- School of Environmental Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, China
| | - Yan Sun
- School of Public Administration, Hohai University, Nanjing 211100, China
| | - Jing Ma
- School of Public Administration, Hohai University, Nanjing 211100, China
| | - Liping Wang
- School of Environmental Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, China
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4
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Olomukoro AA, DeRosa C, Gionfriddo E. Investigation of the adsorption/desorption mechanism of perfluoroalkyl substances on HLB-WAX extraction phases for microextraction. Anal Chim Acta 2023; 1260:341206. [PMID: 37121661 DOI: 10.1016/j.aca.2023.341206] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 03/24/2023] [Accepted: 04/09/2023] [Indexed: 05/02/2023]
Abstract
The C-F alkyl structural backbone of per- and polyfluoroalkyl substances makes this class of molecules resistant to heat and degradation, leading to their high persistence and mobility in the environment and bioaccumulation in the tissues of living organisms. In this study, 15 PFAS with an alkyl chain length from C4 to C14, currently monitored by the U.S. Environmental Protection Agency (EPA), were preconcentrated by solid-phase microextraction (SPME) and analyzed by liquid chromatography-tandem mass spectrometry. The adsorption and desorption mechanisms of PFAS onto ion-exchange extraction phases was evaluated to understand the extraction process of PFAS from various environmental matrices under different conditions. This was achieved using two SPME geometries, namely fibers and thin films. The use of thin films resulted in a twofold improvement in extraction efficiency compared to fibers, especially for the short-chain PFAS. Methanol:water (80:20, v/v) was chosen as the optimized desorption solution, with ammonium formate added to minimize carryover. Extraction time profiles for both SPME geometries showed faster equilibration with thin films (30 min) compared to fibers (90-120 min). The linear dynamic range obtained with this method using fibers and thin films ranged from 10 to 5000 ng L-1 and 2.5-5000 ng L-1, respectively, with acceptable accuracy (70-130%) and precision (<15%). LOD ranged within 2.5-10 ng L-1 for fibers and 0.01-0.25 ng L-1 for thin films. Investigating the factors affecting PFAS recovery in complex samples enabled the quantitative assessment of PFAS contamination in various environmental water samples such as seawater, melted snow and biospecimens like human plasma. A 96-SPME holder was used for validation, which is compatible with sampling in 96-well plates and ensures high throughput in the analysis of real samples. The total concentration of PFAS detected in seawater and snow was 51.3 ng L-1 and 16.4 ng L-1, respectively.
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Affiliation(s)
- Aghogho A Olomukoro
- Department of Chemistry and Biochemistry, The University of Toledo, Toledo, OH, 43606, USA; Dr. Nina McClelland Laboratories for Water Chemistry and Environmental Analysis, The University of Toledo, Toledo, OH, 43606, USA
| | - Charlotte DeRosa
- Dr. Nina McClelland Laboratories for Water Chemistry and Environmental Analysis, The University of Toledo, Toledo, OH, 43606, USA; College of Pharmacy and Pharmaceutical Sciences, The University of Toledo, Toledo, OH, 43606, USA
| | - Emanuela Gionfriddo
- Department of Chemistry and Biochemistry, The University of Toledo, Toledo, OH, 43606, USA; Dr. Nina McClelland Laboratories for Water Chemistry and Environmental Analysis, The University of Toledo, Toledo, OH, 43606, USA; School of Green Chemistry and Engineering, The University of Toledo, Toledo, OH, 43606, USA.
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Chen X, Hussain S, Tang Y, Chen X, Zhang S, Wang Y, Zhang P, Gao R, Wang S, Hao Y. Two-in-one platform based on conjugated polymer for ultrasensitive ratiometric detection and efficient removal of perfluoroalkyl substances from environmental water. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 860:160467. [PMID: 36436641 DOI: 10.1016/j.scitotenv.2022.160467] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 11/20/2022] [Accepted: 11/20/2022] [Indexed: 06/16/2023]
Abstract
Continuous emergence of persistent organic pollutants perfluorooctanoic acid (PFOA) and perfluorooctane sulfonic acid (PFOS) in various water bodies around the world poses a serious threat to the global ecosystem. The exploration of advanced detection/removal techniques to monitor/treat such type of toxicants is urgently required. Herein, we unveiled a donor-acceptor type conjugated polymer PF-DBT-Im as a first-of-its-kind ratiometric fluorescent probe for visual, amplified, and specific monitoring of PFOA and PFOS with ultra-low detection limits of 6.12 nM (PFOA) and 14.3 nM (PFOS), respectively. PF-DBT-Im undergoes strong aggregation after binding with PFOA/PFOS as evident by transmission electron microscopy, zeta potential measurements, and dynamic light scattering studies. This promotes interchain Förster resonance energy transfer process to endorse an obvious emission color change from blue-to-magenta under ultraviolet lamp excitation. Consequently, a smartphone-integrated portable device is fabricated for realizing rapid and on-site detection of PFOA/PFOS. Besides, a new class of magnetic adsorbent Fe3O4@NH2&F13 is also prepared and used in combination with PF-DBT-Im to remove PFOA/PFOS from the environmental water effectively and rapidly as confirmed by liquid chromatography-mass spectrometry analysis. Thus, utilizing the excellent signal amplification property of PF-DBT-Im and the remarkable magnetic separation capability of Fe3O4@NH2&F13, a multifunctional system is developed for step-wise recognition and separation of PFOA/PFOS from the environmental water proficiently and rapidly.
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Affiliation(s)
- Xiaoyi Chen
- School of Pharmacy, Health Science Center, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China
| | - Sameer Hussain
- School of Chemistry, Xi'an Jiaotong University, Xi'an 710049, China
| | - Yuhai Tang
- School of Chemistry, Xi'an Jiaotong University, Xi'an 710049, China
| | - Xi Chen
- School of Chemistry, Xi'an Jiaotong University, Xi'an 710049, China
| | - Sijie Zhang
- School of Pharmacy, Health Science Center, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China
| | - Yue Wang
- School of Chemistry, Xi'an Jiaotong University, Xi'an 710049, China
| | - Pei Zhang
- Department of Urology, Second Affiliated Hospital, Xi'an Jiaotong University, Xi'an 710004, China
| | - Ruixia Gao
- School of Chemistry, Xi'an Jiaotong University, Xi'an 710049, China.
| | - Sicen Wang
- School of Pharmacy, Health Science Center, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China
| | - Yi Hao
- School of Pharmacy, Health Science Center, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China.
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Saawarn B, Mahanty B, Hait S, Hussain S. Sources, occurrence, and treatment techniques of per- and polyfluoroalkyl substances in aqueous matrices: A comprehensive review. ENVIRONMENTAL RESEARCH 2022; 214:114004. [PMID: 35970375 DOI: 10.1016/j.envres.2022.114004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Revised: 07/04/2022] [Accepted: 07/25/2022] [Indexed: 06/15/2023]
Abstract
Per- and polyfluoroalkyl substances (PFAS), a class of synthetic organic pollutants, have prompted concerns about their global prevalence and possible health effects. This review consolidates the most recent data on different aspects of PFAS, such as their occurrence, and prominent sources. The current literature analysis of PFAS occurrence suggests significant variation in their concentration ranging from 0.025 to 1.2 × 108 ng/L in wastewater, 0.01 to 8.9 × 105 ng/L in surface water, and <0.01 to 1.3 × 104 ng/L in groundwater globally. Since conventional treatment techniques are inadequate in remediating PFAS, innovative treatment approaches based on their removal or mineralization mechanism have been comprehensively reviewed. Advanced treatment technologies have shown degradation or removal of PFAS to be around 6 and > 99.9% in different aqueous matrices. However, due to significant drawbacks in their applicability in wastewater treatment plants (WWTPs), a novel treatment train approach has emerged as an effective alternative. This approach synergistically integrates multiple remediation techniques while addressing the impediments of individual treatments. Furthermore, nanofiltration (NF270) combined with electrochemical degradation has been demonstrated to be the most efficient (>98%) treatment train approach in PFAS remediation. If implemented in WWTPs, nanofiltration followed by adsorption using activated carbon is also a viable method for PFAS removal.
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Affiliation(s)
- Bhavini Saawarn
- Department of Civil and Environmental Engineering, Indian Institute of Technology Patna, Bihar, 801 106, India
| | - Byomkesh Mahanty
- Department of Civil and Environmental Engineering, Indian Institute of Technology Patna, Bihar, 801 106, India
| | - Subrata Hait
- Department of Civil and Environmental Engineering, Indian Institute of Technology Patna, Bihar, 801 106, India.
| | - Sahid Hussain
- Department of Chemistry, Indian Institute of Technology Patna, Bihar, 801 106, India
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Liu S, Jin B, Arp HPH, Chen W, Liu Y, Zhang G. The Fate and Transport of Chlorinated Polyfluorinated Ether Sulfonates and Other PFAS through Industrial Wastewater Treatment Facilities in China. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:3002-3010. [PMID: 35133129 DOI: 10.1021/acs.est.1c04276] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Wastewater from certain industrial processes can be primary emission sources of per- and polyfluoroalkyl substances (PFAS) and fluorinated alternatives like chlorinated polyfluorinated ether sulfonates (Cl-PFESA). Two such industrial processes are electroplating and textile printing and dyeing (PD). This study focused on the fate of Cl-PFESA in wastewater from these two industrial processes, in comparison to other PFAS, as they went through different wastewater treatment plants located in southeast China. The total target PFAS concentrations were 520 ± 30 and 4200 ± 270 ng/L at the effluents of the PD WWTP and electroplating WWTP, respectively. Specifically, 6:2 Cl-PFESA (18%) and 8:2 Cl-PFESA (0.7%) were abundant in electroplating-wastewater. Cl-PFESA were also detected in PD wastewater but at trace concentrations and were likely present due to diffuse emissions. The dissolved-phase Cl-PFESA and PFAS mass flows through the WWTPs were fairly constant throughout both facilities. The majority of Cl-PFESA was captured by sludge sedimentation. However, there were individual treatment processes that could cause the wastewater concentrations to fluctuate, and also could lead to relative enrichment of specific Cl-PFESAs as indicated by the 6:2/8:2 Cl-PFESA ratios. Cl-PFESA and perfluoroalkyl sulfonic acids were more influenced by the investigated treatment processes than perfluorocarboxylic acids.
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Affiliation(s)
- Shiyang Liu
- State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
- CAS Center for Excellence in Deep Earth Science, Guangzhou 510640, China
- University of Chinese Academy of Sciences, Beijing 10069, China
| | - Biao Jin
- State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
- CAS Center for Excellence in Deep Earth Science, Guangzhou 510640, China
- University of Chinese Academy of Sciences, Beijing 10069, China
| | - Hans Peter H Arp
- Norwegian Geotechnical Institute (NGI), P.O. Box 3930 Ullevaal Stadion, Oslo N-0806, Norway
- Norwegian University of Science and Technology (NTNU), NO-7491 Trondheim, Norway
| | - Wenwen Chen
- College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China
| | - Yi Liu
- State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
- CAS Center for Excellence in Deep Earth Science, Guangzhou 510640, China
- University of Chinese Academy of Sciences, Beijing 10069, China
| | - Gan Zhang
- State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
- CAS Center for Excellence in Deep Earth Science, Guangzhou 510640, China
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Lenka SP, Kah M, Padhye LP. A review of the occurrence, transformation, and removal of poly- and perfluoroalkyl substances (PFAS) in wastewater treatment plants. WATER RESEARCH 2021; 199:117187. [PMID: 34010737 DOI: 10.1016/j.watres.2021.117187] [Citation(s) in RCA: 172] [Impact Index Per Article: 57.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2021] [Revised: 04/19/2021] [Accepted: 04/20/2021] [Indexed: 05/26/2023]
Abstract
Poly- and perfluoroalkyl substances (PFAS) comprise more than 4,000 anthropogenically manufactured compounds with widescale consumer and industrial applications. This critical review compiles the latest information on the worldwide distribution of PFAS and evaluates their fate in wastewater treatment plants (WWTPs). A large proportion (>30%) of monitoring studies in WWTPs were conducted in China, followed by Europe (30%) and North America (16%), whereas information is generally lacking for other parts of the world, including most of the developing countries. Short and long-chain perfluoroalkyl acids (PFAAs) were widely detected in both the influents (up to 1,000 ng/L) and effluents (15 to >1,500 ng/L) of WWTPs. To date, limited data is available regarding levels of PFAS precursors and ultra-short chain PFAS in WWTPs. Most WWTPs exhibited low removal efficiencies for PFAS, and many studies reported an increase in the levels of PFAAs after wastewater treatment. The analysis of the fate of various classes of PFAS at different wastewater treatment stages (aerobic and/aerobic biodegradation, photodegradation, and chemical degradation) revealed biodegradation as the primary mechanism responsible for the transformation of PFAS precursors to PFAAs in WWTPs. Remediation studies at full scale and laboratory scale suggest advanced processes such as adsorption using ion exchange resins, electrochemical degradation, and nanofiltration are more effective in removing PFAS (~95-100%) than conventional processes. However, the applicability of such treatments for real-world WWTPs faces significant challenges due to the scaling-up requirements, mass-transfer limitations, and management of treatment by-products and wastes. Combining more than one technique for effective removal of PFAS, while addressing limitations of the individual treatments, could be beneficial. Considering environmental concentrations of PFAS, cost-effectiveness, and ease of operation, nanofiltration followed by adsorption using wood-derived biochar and/or activated carbons could be a viable option if introduced to conventional treatment systems. However, the large-scale applicability of the same needs to be further verified.
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Affiliation(s)
| | - Melanie Kah
- School of Environment, The University of Auckland, Auckland, New Zealand
| | - Lokesh P Padhye
- Department of Civil and Environmental Engineering, The University of Auckland, Auckland, New Zealand.
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Jin Q, Liu S, Huang X, Ren R, Zhu G. Determination of Ionic and Nonionic Perfluoroalkyl Substances (PFASs) in the Surface Water of the Qiantang River, China by Solid-Phase Extraction (SPE) and Ultra-High Performance Liquid Chromatography-Tandem Mass Spectrometry (UHPLC-MS/MS). ANAL LETT 2021. [DOI: 10.1080/00032719.2020.1783280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Quan Jin
- Laboratory of Chemistry and Physics, Hangzhou Center for Disease Control and Prevention, Hangzhou, China
| | - Shaoying Liu
- Laboratory of Chemistry and Physics, Hangzhou Center for Disease Control and Prevention, Hangzhou, China
| | - Xihui Huang
- Laboratory of Chemistry and Physics, Hangzhou Center for Disease Control and Prevention, Hangzhou, China
| | - Ren Ren
- Laboratory of Chemistry and Physics, Hangzhou Center for Disease Control and Prevention, Hangzhou, China
| | - Guonian Zhu
- Institute of Pesticide and Environmental Toxicology, Zhejiang University, Hangzhou, China
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