Removal of selenium from contaminated agricultural drainage water by nanofiltration membranes
Removal of selenium from contaminated agricultural drainage water by nanofiltration membranes
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DOI：
10.1016/s0883-2927(96)00044-3
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发表时间：
1996-11-01
影响因子：
3.4
通讯作者：
Davis, RA
中科院分区：
文献类型：
--
作者：
Kharaka, YK;Ambats, G;Davis, RA
含硒农业废水已成为世界范围内新的主要污染源。在美国，西部17个州的大面积农田产生了受污染的盐化排水，其硒浓度远高于5 μ g/l，这是美国环境保护署保护水生生物的水质标准;在加州的圣华金河谷西部，硒值局部达到4200 μ g/l。湿地栖息地接受此排水一般显示硒中毒的水禽造成高利率的胚胎畸形和死亡率，或已表明潜在的生态damage.Results的我们的实验室流实验表明，纳滤，最新的膜分离技术，可以选择性地去除>95%的硒和其他多价阴离子从>90%的高度污染的水从圣华金河谷，加州。这样的膜产生更大的水输出，并且需要更低的压力和更少的预处理，因此比传统的反渗透膜更具成本效益。纳滤膜为硒污染废物的管理提供了一个潜在的突破，不仅来自农业排水，但也来自其他来源。版权所有（C）1996 Elsevier Science Ltd.
Seleniferous agricultural drainage wastewater has become a new major source of pollution in the world. In the USA, large areas of farmland in 17 western states, generate contaminated salinized drainage with Se concentrations much higher than 5 mu g/l, the US Environmental Protection Agency water-quality criterion for the protection of aquatic life; Se values locally reach 4200 mu g/l in western San Joaquin Valley, California. Wetland habitats receiving this drainage have generally shown Se toxicosis in aquatic birds causing high rates of embryonic deformity and mortality, or have indicated potential ecological damage.Results of our laboratory flow experiments indicate that nanofiltration, the latest membrane separation technology, can selectively remove >95% of Se and other multivalent anions from >90% of highly contaminated water from the San Joaquin Valley, California. Such membranes yield greater water output and require lower pressures and less pretreatment, and therefore, are more cost effective than traditional reverse osmosis membranes. Nanofiltration membranes offer a potential breakthrough for the management of Se contaminated wastes not only from agricultural drainage, but from other sources also. Copyright (C) 1996 Elsevier Science Ltd.