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Effect of ferrate pre-oxidation on algae-laden water ultrafiltration: Attenuating membrane fouling and decreasing formation potential of disinfection byproducts

机译：铁晶预氧化对藻类水超滤的影响：减弱膜污染和消毒副产品的形成潜力

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摘要

Effect of ferrate [Fe(VI)] pre-oxidation on improving FeCl3/ultrafiltration (UF) of algae-laden source water was investigated. Fe(VI) disrupted algae cells and the in situ formed ferric (hydr)oxides aggregated with cell debris. Particle size and zeta potential of algae increased by 20% and 55% on average, respectively, after treatment with 0.02 mM of Fe(VI). These variations facilitated the formation of algae-ferric floc. Fe(VI) degraded algal extracellular organic matter into lower molecular weight products (fulvic-like and humic-like substances). Membrane flux, reversible membrane resistance (R-r) and irreversible membrane resistance (R-ir) were improved by 51%, 61%, and 52% in Fe(VI) (0.02 mM)/FeCl3/UF treatment group compared with FeCl3/UF treatment after three filtration cycles. Fe(VI)/FeCl3/UF removed more than 10% similar to 34% of the dissolved organic compounds (DOC) and 6% similar to 17% of the total nitrogen (TN) compared with FeCl3/UF. Due to the enhanced removal of DOC and TN, formation potential of 12 kinds of carbonaceous-disinfection byproducts (C-DBPs) and 7 kinds of nitrogenous-disinfection byproducts (N-DBPs) decreased by 32.5% and 22.5%, respectively. Fe(VI) pre-oxidant was effective for alleviating membrane fouling and reducing formation potential of DBPs in algal laden water treatment. (c) 2020 Elsevier Ltd. All rights reserved.
机译：RECRATE [FE（VI）]对改善藻类源水的FECL3 /超滤（UF）的改进对藻类源水的影响。 Fe（VI）破坏藻类细胞，原位形成的铁（氢）氧化物与细胞碎片聚集。在用0.02mm的Fe（VI）处理后，藻类的颗粒尺寸和Zeta电位分别同比增加20％和55％，55％。这些变化促进了藻类絮状物的形成。 Fe（VI）将藻类细胞外有机物质降低到较低分子量产物（富含腐殖质和腐殖质的物质）中。与FECL3 / UF相比，膜通量，可逆膜抗性（RR）和不可逆膜抗性（R-IR）在Fe（VI）（0.02mM）/ FECL3 / UF处理组中提高了51％，61％和52％三次过滤循环后治疗。与FECL3 / UF相比，Fe（VI）/ FECL3 / UF移除了与34％的溶解有机化合物（DOC）和6％相似的6％，与总氮气（TN）的占17％相似。由于增强了DOC和TN的去除，12种碳质 - 消毒副产物（C-DBPS）和7种含氮消毒副产品（N-DBPS）的形成电位分别降低了32.5％和22.5％。 Fe（VI）预氧化剂可有效地减轻膜污垢和降低藻类升水水处理中DBP的形成电位。 （c）2020 elestvier有限公司保留所有权利。

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  • 来源
    《Water Research》 |2021年第15期|116690.1-116690.11|共11页
  • 作者

    He Hai-Yang; Qiu Wei; Liu Yu-Lei; Yu Hua-Rong; Wang Lu; Ma Jun;

  • 作者单位

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

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

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

    Guangzhou Univ Sch Civil Engn Guangzhou 510006 Peoples R China;

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

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

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
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