文章基本信息

标题：Biopolymer-reinforced synthetic granular nanocomposites for affordable point-of-use water purification
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作者：Mohan Udhaya Sankar ; Sahaja Aigal ; Shihabudheen M. Maliyekkal 等
期刊名称：Proceedings of the National Academy of Sciences
印刷版ISSN：0027-8424
电子版ISSN：1091-6490
出版年度：2013
卷号：110
期号：21
页码：8459-8464
DOI：10.1073/pnas.1220222110
语种：English
出版社：The National Academy of Sciences of the United States of America
摘要：Creation of affordable materials for constant release of silver ions in water is one of the most promising ways to provide microbially safe drinking water for all. Combining the capacity of diverse nanocomposites to scavenge toxic species such as arsenic, lead, and other contaminants along with the above capability can result in affordable, all-inclusive drinking water purifiers that can function without electricity. The critical problem in achieving this is the synthesis of stable materials that can release silver ions continuously in the presence of complex species usually present in drinking water that deposit and cause scaling on nanomaterial surfaces. Here we show that such constant release materials can be synthesized in a simple and effective fashion in water itself without the use of electrical power. The nanocomposite exhibits river sand-like properties, such as higher shear strength in loose and wet forms. These materials have been used to develop an affordable water purifier to deliver clean drinking water at US $2.5/y per family. The ability to prepare nanostructured compositions at near ambient temperature has wide relevance for adsorption-based water purification.
关键词：hybrid ; green ; appropriate technology ; frugal science ; developing world