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首页> 外文期刊>Water Research >Organic matter removal and membrane fouling mitigation during algae-rich surface water treatment by powdered activated carbon adsorption pretreatment: Enhanced by UV and UV/chlorine oxidation
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Organic matter removal and membrane fouling mitigation during algae-rich surface water treatment by powdered activated carbon adsorption pretreatment: Enhanced by UV and UV/chlorine oxidation

机译：通过粉末活性炭吸附预处理进行藻类水处理处理过程中的有机物质去除和膜污水缓解：UV和UV /氯氧化增强

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摘要

In this work, UV and UV/chlorine (UV/Cl) were employed to enhance powdered activated carbon (PAC) adsorption pretreatment prior to ultrafiltration process for algae-contaminated surface water treatment. Their performance on membrane fouling mitigation and organic pollutant rejection was systematically evaluated. A comparative experiment was conducted under varying pollution degrees of algal extra-cellular organic matter (EOM) contamination in surface river water. The results indicated that UV/PAC and UV/Cl/PAC pretreatment effectively enhanced the removal of dissolved organic carbon (DOC) and UV-absorbing at 254 nm (UV254). The characteristics of feed water after pretreatments were investigated through apparent molecular-weight (MW) distribution and fluorescence parallel factor analysis (PAR-AFAC). In regard to membrane fouling mitigation, UV/Cl/PAC noticeably decreased reversible and irreversible fouling resistance simultaneously and UV/PAC preferred reducing reversible membrane fouling. Combined fouling modeling was operated to scrutinize the fouling mitigation mechanisms and standard pore blocking was proved to be dominant during the filtration process. Moreover, the UV/Cl and UV/Cl/PAC pretreatments were proved positive for emerging micropollutants degradation and disinfection byproducts formation potential reduction. The results suggested that UV and UV/CI are likely strategies to enhance the efficiency of PAC adsorption pretreatments prior to ultrafiltration during algae contaminated water treatment. (C) 2019 Elsevier Ltd. All rights reserved.
机译：在该工作中，使用UV和UV /氯（UV / CL）在超滤过程中增强粉末活性炭（PAC）吸附预处理，用于藻类污染的地表水处理。系统地评估了它们对膜污染缓解和有机污染物排斥反应的性能。在地表河水中不同污染藻类细胞有机物质（EOM）污染的不同污染程度进行了比较实验。结果表明，UV / PAC和UV / CL / PAC预处理有效增强了在254nm（UV254）的溶解有机碳（DOC）和UV吸收的去除。通过表观分子量（MW）分布和荧光平行因子分析（PAR-AFAC）研究了预处理后进料水的特性。关于膜污垢缓解，UV / Cl / PAC显着降低可逆性和不可逆的污垢抗性，同时和UV / PAC优选地减少可逆膜污垢。组合的污垢建模经营以仔细检查结垢缓解机制和标准孔隙阻断在过滤过程中被证明是显性的。此外，证明了UV / Cl和UV / Cl / PAC预处理的预处理对于出现的微细潜水剂降解和消毒副产物形成电位降低。结果表明，UV和UV / CI可能是在藻类污染水处理期间超滤之前提高PAC吸附预处理的效率的策略。 （c）2019 Elsevier Ltd.保留所有权利。

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  • 来源
    《Water Research》 |2019年第1期|283-293|共11页
  • 作者

    Xing Jiajian; Liang Heng; Xu Siqi; Chuah Chong Joon; Luo Xinsheng; Wang Tianyu; Wang Jinlong; Li Guibai; Snyder Shane A.;

  • 作者单位

    Harbin Inst Technol Sch Environm State Key Lab Urban Water Resource & Environm Harbin 150090 Heilongjiang Peoples R China;

    Harbin Inst Technol Sch Environm State Key Lab Urban Water Resource & Environm Harbin 150090 Heilongjiang Peoples R China;

    Harbin Inst Technol Sch Environm State Key Lab Urban Water Resource & Environm Harbin 150090 Heilongjiang Peoples R China;

    Nanyang Technol Univ NEWRI 1 Cleantech Loop Singapore 637141 Singapore;

    Harbin Inst Technol Sch Environm State Key Lab Urban Water Resource & Environm Harbin 150090 Heilongjiang Peoples R China;

    Harbin Inst Technol Sch Environm State Key Lab Urban Water Resource & Environm Harbin 150090 Heilongjiang Peoples R China;

    Harbin Inst Technol Sch Environm State Key Lab Urban Water Resource & Environm Harbin 150090 Heilongjiang Peoples R China;

    Harbin Inst Technol Sch Environm State Key Lab Urban Water Resource & Environm Harbin 150090 Heilongjiang Peoples R China;

    Nanyang Technol Univ NEWRI 1 Cleantech Loop Singapore 637141 Singapore;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Powdered activated carbon; UV/Chlorine process; Algal-rich water; Membrane fouling; Micropollutants;

    机译：粉末活性炭;紫外/氯气过程;富含藻类;膜污垢;微污染物;

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