Effect of dissolved organic matter on arsenic removal by nanofiltration

Effect of dissolved organic matter on arsenic removal by nanofiltration
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溶解有机物对纳滤除砷的影响

DOI:
10.1080/19443994.2012.734687
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发表时间:
2013-02
影响因子:
1.1
通讯作者:
Xia, Shengji
Xia, Shengji
中科院分区:
工程技术4区
文献类型:
--
作者:
Xu, Bin;Gao, Naiyun;Dong, Bingzhi;Xia, Shengji

文献摘要

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摘要砷是一种致癌物质,可引起皮肤癌和多种内脏癌。水的砷污染迫使水和卫生当局对饮用水中的砷控制水平引入严格的标准。纳滤是一种很有前途的除砷方法,它是通过尺寸排阻和电排斥的作用,这是可靠的,易于生产,获得,操作和维护。通过一系列的实验室台架试验,研究了溶解性有机物(DOM)对纳滤除砷效果的影响。腐殖酸(HA)作为DOM的替代物,通过形成腐殖酸/砷复合物,提高了砷的去除率。高浓度HA(10 mg TOC/L)时,砷的去除率接近100%,高于低浓度HA(2 mg TOC/L)时的去除率(80%)。膜通量F…
Abstract Arsenic is known as a carcinogen that causes skin cancer and various internal cancers. The arsenic contamination in water forced the water and health authorities to introduce stringent standards for arsenic control level in drinking water. Nanofiltration presents a promising method to remove arsenic, by the effect of both size exclusion and electric repulse, which is reliable, easy to produce, obtain, operate, and maintain. In this work, the influences of dissolved organic matter (DOM) on arsenic removal by nanofiltration process were investigated through a series of laboratory bench-level experiments. The existing of humic acid (HA), which was used as substitute of DOM, increased the arsenic removal due to the formation of humic/arsenic complexes. With the presence of high concentration of HA (10 mg total organic carbon [TOC]/L), the removal efficiency of arsenic was almost 100%, which was higher compared with the result (80%) obtained at low concentration of HA (2 mg TOC/L). The membrane flux f...
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