Rejection characteristics of organic and inorganic pollutants by ultra low-pressure nanofiltration of surface water for drinking water treatment☆
Rejection characteristics of organic and inorganic pollutants by ultra low-pressure nanofiltration of surface water for drinking water treatment☆
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DOI：
10.1016/s0011-9164(02)00420-4
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发表时间：
2002-09
期刊：
影响因子：
9.9
通讯作者：
M. Thanuttamavong;Kazuo Yamamoto;Jeong-ik Oh;K. Choo;Sang-June Choi
中科院分区：
文献类型：
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作者：
M. Thanuttamavong;Kazuo Yamamoto;Jeong-ik Oh;K. Choo;Sang-June Choi
本文研究了超低压纳滤处理地表水对有机和无机污染物的截留特性。对日本多摩河地表水进行了纳滤研究。对河水的水质进行了调查。通过长期运行考察了膜污染对纳滤性能的影响。讨论了预处理单元的应用效果，并与未采用预处理工艺的纳滤系统进行了性能比较。膜的性质，如截留分子量和表面电荷已被表征。分别从尺寸排阻和静电效应两个方面阐述了纳滤膜对有机和无机污染物的截留机理。利用数学模型描述了离子溶质在纳滤膜中的传输现象，并对纳滤膜的有效电荷密度进行了估算。此外，新鲜和污染的纳滤膜之间的有效电荷密度的比较进行了讨论。
Rejection characteristics of organic and inorganic pollutants by an ultra low-pressure nanofiltration of surface water for drinking water treatment are demonstrated here. Nanofiltration of surface water from the Tama river, Japan has been studied. Water quality of the river water has been investigated. Long-term operations have been done for investigation of changing of nanofiltration performances caused by membrane fouling. Effects of an application of pretreatment unit are discussed, and its performances are compared with the performances of nanofiltration system without such pretreatment process. Membrane properties such as molecular weight cutoff and surface electric charge have been characterized. Rejection mechanisms of organic and inorganic pollutants by nanofiltration membranes are described regarding size exclusion and electrostatic effect, respectively. Mathematical models, which state transport phenomena of ionic solutes through nanofiltration membranes, are used to estimate effective charge density of nanofiltration membrane. In addition, a comparison of effective charge densities between fresh and fouled nanofiltration membranes is discussed.