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电絮凝法去除模拟废水中的PFOS和PFOA

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于文静, 鲍佳, 刘洋, 刘智群, 辛红, 彭富海. 电絮凝法去除模拟废水中的PFOS和PFOA[J]. 环境化学, 2020, (5): 1235-1243. doi: 10.7524/j.issn.0254-6108.2019051901
引用本文: 于文静, 鲍佳, 刘洋, 刘智群, 辛红, 彭富海. 电絮凝法去除模拟废水中的PFOS和PFOA[J]. 环境化学, 2020, (5): 1235-1243. doi: 10.7524/j.issn.0254-6108.2019051901
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YU Wenjing, BAO Jia, LIU Yang, LIU Zhiqun, XIN Hong, PENG Fuhai. Removal of perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA) from simulated water by electrocoagulation[J]. Environmental Chemistry, 2020, (5): 1235-1243. doi: 10.7524/j.issn.0254-6108.2019051901
Citation: YU Wenjing, BAO Jia, LIU Yang, LIU Zhiqun, XIN Hong, PENG Fuhai. Removal of perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA) from simulated water by electrocoagulation[J]. Environmental Chemistry, 2020, (5): 1235-1243. doi: 10.7524/j.issn.0254-6108.2019051901
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电絮凝法去除模拟废水中的PFOS和PFOA

  • 沈阳工业大学理学院, 沈阳, 110870

    • 通讯作者: 鲍佳, E-mail: baojia@sut.edu.cn ;  刘洋, E-mail: liuyang@sut.edu.cn ; 
  • 基金项目:

    国家自然科学基金（21507092）资助.

Removal of perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA) from simulated water by electrocoagulation

  • School of Science, Shenyang University of Technology, Shenyang, 110870, China

    • Corresponding authors: BAO Jia, baojia@sut.edu.cn ;  LIU Yang, liuyang@sut.edu.cn ; 
  • Fund Project: Supported by the National Natural Science Foundation of China (21507092).

  • 摘要: 由于全氟化合物（PFCs）具有持久性、生物富集性和多种毒性，近年来人们日益关注广泛存在于工业废水、生活污水、以及天然水体中的全氟辛烷磺酸（PFOS）和全氟辛酸（PFOA）污染.本研究通过周期换向电絮凝法对模拟废水中的PFOS和PFOA污染进行高效处理，并对处理条件和吸附机理进行深入探讨.鉴于其去除效果会受到不同因素的影响，为明确最优参数，本研究着眼于以下影响因素：电极材料、电流密度、pH值、电解质的浓度与种类、极板间距、换相时间、转速、污染物的初始浓度等，同时采用控制变量法研究不同条件下溶液中PFOS和PFOA的去除率.由实验结果可知，在使用Al-Zn电极、添加0.035 mol·L-1的NaCl、电流密度调整为25 mA·cm-2、初始pH值控制在7左右、电极间距为2 cm、换向时间为10 s、转速为600 r·min-1的条件下，PFOS和PFOA的去除效果最佳.
    Abstract: Because of the persistence, bioaccumulation, and multiple toxicities of perfluorinated compounds (PFCs), increasing attentions have been paid on perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA) widespread contaminations in industrial and domestic wastewaters, and even natural water bodies in recent years. In this study, treatment of PFOS and PFOA in simulated solution was performed effectively with the periodically reverse electrocoagulation (PREC), and further studies were implemented on the conditions of treatment and adsorption mechanism. Since the removal effects of PREC could be affected by various factors, this study focused on the following factors in order to determine the optimal parameters, involving electrode material, current density, pH value, concentration and type of electrolyte, plate spacing, reversion time, stirring speed, and initial concentration of pollutants. In addition, the removal rates of PFOS and PFOA under different conditions were also studied by control variable methods. The experimental results showed that the optimal removal efficiency of PFOS and PFOA treatment could be achieved under the conditions of using Al-Zn electrode, adding 0.035 mol·L-1 NaCl, adjusting current density to 25 mA·cm-2, controlling initial pH at about 7, setting distance between electrodes to 2 cm, reversion time to 10 s, and speed to 600 r·min-1.
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  • 收稿日期:  2019-05-19

电絮凝法去除模拟废水中的PFOS和PFOA

  • 收稿日期:  2019-05-19
基金项目:

国家自然科学基金（21507092）资助.

摘要: 由于全氟化合物（PFCs）具有持久性、生物富集性和多种毒性，近年来人们日益关注广泛存在于工业废水、生活污水、以及天然水体中的全氟辛烷磺酸（PFOS）和全氟辛酸（PFOA）污染.本研究通过周期换向电絮凝法对模拟废水中的PFOS和PFOA污染进行高效处理，并对处理条件和吸附机理进行深入探讨.鉴于其去除效果会受到不同因素的影响，为明确最优参数，本研究着眼于以下影响因素：电极材料、电流密度、pH值、电解质的浓度与种类、极板间距、换相时间、转速、污染物的初始浓度等，同时采用控制变量法研究不同条件下溶液中PFOS和PFOA的去除率.由实验结果可知，在使用Al-Zn电极、添加0.035 mol·L-1的NaCl、电流密度调整为25 mA·cm-2、初始pH值控制在7左右、电极间距为2 cm、换向时间为10 s、转速为600 r·min-1的条件下，PFOS和PFOA的去除效果最佳.

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