紫外/亚硫酸盐/碘化物体系对六氟环氧丙烷三聚酸(HFPO-TA)脱氟的影响

IF 2.5 4区 环境科学与生态学 Q3 ENGINEERING, ENVIRONMENTAL Water Science and Technology Pub Date : 2024-12-01 Epub Date: 2024-12-06 DOI:10.2166/wst.2024.392
Jie Gao, Chaojie Zhang, Liquan Chu, Yunmeng Zhao, Zhenyu Zhai, Xuefei Zhou, Yalei Zhang
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引用次数: 0

摘要

六氟环氧丙烷三聚酸(HFPO-TA)是传统全氟烷基物质(PFASs)的新兴替代品,其特点是具有生物毒性和持久性。紫外/亚硫酸盐/碘化物光诱导水合电子体系在温和条件下可有效降解HFPO-TA。然而,水质对该系统的影响亟待研究。本研究探讨了常见的水相组分Cl-、HCO3-、PO43-和腐植酸(HA)对紫外/亚硫酸盐/碘化物体系中HFPO-TA脱氟效率的影响。结果表明,低浓度的Cl- (
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Influence of aqueous constituents on hexafluoropropylene oxide trimer acid (HFPO-TA) defluorination by UV/sulfite/iodide system.

Hexafluoropropylene oxide trimer acid (HFPO-TA) is an emerging alternative to traditional perfluoroalkyl substances (PFASs), which is characterized by its biotoxicity and persistence. The UV/sulfite/iodide photo-induced hydrated electrons system can effectively degrade HFPO-TA under mild conditions. However, the effects of water quality on this system need to be urgently investigated. This study explored the impact of common aqueous constituents, such as Cl-, HCO3-, PO43- and humic acid (HA) on the defluorination efficiency of HFPO-TA by the UV/sulfite/iodide system. Results indicated that low concentrations of Cl- (<1.0 mM), PO43- (<0.01 mM), and HA (<1.0 mg/L) have little effect on defluorination efficiency. However, as concentrations increase, these constituents can interact with photosensitizers or reactive species within the system, leading to a decrease in defluorination efficiency. HCO3-, in their various solution states, can compete with HFPO-TA for the hydrated electron (eaq-) or engage directly with the photosensitizer, resulting in a hindrance to the defluorination capabilities of the system. Furthermore, it was identified that the components in Xiaoqing River, especially Cl- and HCO3-, could greatly inhibit the defluorination and degradation efficiency of HFPO-TA by the system. Pretreatment such as nanofiltration would effectively mitigate this problem.

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来源期刊
Water Science and Technology
Water Science and Technology 环境科学-工程:环境
CiteScore
4.90
自引率
3.70%
发文量
366
审稿时长
4.4 months
期刊介绍: Water Science and Technology publishes peer-reviewed papers on all aspects of the science and technology of water and wastewater. Papers are selected by a rigorous peer review procedure with the aim of rapid and wide dissemination of research results, development and application of new techniques, and related managerial and policy issues. Scientists, engineers, consultants, managers and policy-makers will find this journal essential as a permanent record of progress of research activities and their practical applications.
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