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首页> 外文期刊>Journal of Cleaner Production >Co-effects of epichlorohydrin-dimethylamine and polyferric on humic acid elimination and membrane resistance in hybrid process
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Co-effects of epichlorohydrin-dimethylamine and polyferric on humic acid elimination and membrane resistance in hybrid process

机译：表氯醇-二甲胺和多铁对杂化过程中腐殖酸消除和膜抗性的协同作用

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摘要

The effective coagulation aid epichlorohydrin-dimethylamine was synthesized, its co-effect with three ferric iron species in polyferric chloride on humic acid elimination and membrane pollution in coagulation-ultrafiltration hybrid technique were appraised to improve the hybrid water treatment technology and generate cleaner water production by this research. To be specific, dosages of polyferric chlorides(2) and polyferric chlorides&epichlorohydrin-dimethylamine were adjusted according to their coagulation performance in jar tests. Furthermore, properties of generated flocs such as floc size (median particle diameter), strength/recovery factor and fractal dimension feature were monitored and combined with results of membrane fouling resistance under various shear forces to understand the mechanism of membrane fouling. Results indicated that epichlorohydrin-dimethylamine can observably enhance the coagulation performance of all polyferric chlorides, especially at low dosage of 4 mg/L. The higher the epichlorohydrin-dimethylamine dosage, the higher removal efficiencies achieved. In particular, for polyferric chloride with basicity of 1.5, the removal efficiency for dissolved organic carbon raised approximately from 15% to 32% as epichlorohydrin-dimethylamine dosage increased from zero to 1.5 mg/L. Meanwhile, for ultra-membrane(3) applied in this study, addition of the epichlorohydrin-dimethylamine also significantly reduced the total membrane fouling resistance of all coagulated water samples by forming cake layer of low compactness and reducing residual micro-particles,(4) even when shearing forces was introduced. Thereinto, the total membrane fouling resistance reduction of polyferric chloride with basicity of 1.5 was the most obvious, which dropped from 2.8 x 10(8) m(-1) to 2.3 x 10(8) m(-1), approximately. (C) 2019 Elsevier Ltd. All rights reserved.
机译：合成了有效的助凝剂环氧氯丙烷-二甲胺，评价了它与聚氯化铁中的三种三价铁在混凝-超滤混合技术中对腐殖酸消除和膜污染的协同作用，以改善混合水处理技术并产生更清洁的水。这项研究。具体而言，根据广口瓶试验中的混凝性能，调整聚氯化铁（2）和聚氯化铁和表氯醇-二甲胺的用量。此外，监测絮凝物的性质，如絮凝物的尺寸（中值粒径），强度/回收率和分形维数特征，并结合各种剪切力下的抗膜结垢结果，了解膜结垢的机理。结果表明，环氧氯丙烷-二甲胺可明显提高所有聚氯化铁的凝结性能，尤其是在低剂量4 mg / L时。表氯醇-二甲胺的剂量越高，去除效率越高。特别是，对于碱度为1.5的聚氯化铁，当表氯醇-二甲胺的剂量从零增加到1.5 mg / L时，溶解有机碳的去除效率大约从15％提高到32％。同时，对于本研究中应用的超膜（3），表氯醇-二甲胺的添加还通过形成低致密性的饼状层并减少残留的微粒而显着降低了所有凝结水样品的总膜防垢性，（4）即使引入了剪力。其中，碱度为1.5的聚氯化铁的总膜污染阻力降低最为明显，大约从2.8 x 10（8）m（-1）下降至2.3 x 10（8）m（-1）。 （C）2019 Elsevier Ltd.保留所有权利。

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  • 来源
    《Journal of Cleaner Production》 |2019年第20期|767-778|共12页
  • 作者

    Sun Shenglei; Gao Yue; Zhang Jianwei; Gao Baoyu; Yue Qinyan; Zhang Wei; Lu Zhihao; Zhu Xiaohua;

  • 作者单位

    Qingdao Univ, Sch Environm Sci & Engn, Qingdao 266071, Shandong, Peoples R China;

    Tsinghua Univ, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100084, Peoples R China;

    Qingdao Univ, Sch Environm Sci & Engn, Qingdao 266071, Shandong, Peoples R China;

    Shandong Univ, Sch Environm Sci & Engn, Shandong Key Lab Water Pollut Control & Resource, Jinan 250100, Shandong, Peoples R China;

    Shandong Univ, Sch Environm Sci & Engn, Shandong Key Lab Water Pollut Control & Resource, Jinan 250100, Shandong, Peoples R China;

    Qingdao Univ, Sch Environm Sci & Engn, Qingdao 266071, Shandong, Peoples R China;

    Qingdao Univ, Sch Environm Sci & Engn, Qingdao 266071, Shandong, Peoples R China;

    Natl Res Ctr Geoanal, Key Lab Ecogeochem, Minist Nat Resources, Beijing 100037, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Epichlorohydrin-dimethylamine; Humic acid; Coagulation-ultrafiltration; Floc feature; External/internal membrane fouling resistance;

    机译：表氯醇 - 二甲胺;腐殖酸;凝血超滤;絮凝功能;外部/内膜污垢抵抗;

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