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首页> 外文期刊>Journal of Environmental Science and Health. A, Toxic/Hazardous Substances & Environmental Engineering >A simple and effective arsenic filter based on composite iron matrix: Development and deployment studies for groundwater of Bangladesh
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A simple and effective arsenic filter based on composite iron matrix: Development and deployment studies for groundwater of Bangladesh

机译：一种基于复合铁基质的简单有效的砷过滤器：孟加拉国地下水的开发和利用研究

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Drinking groundwater contaminated with naturally occurring arsenic is a worldwide public health issue. This work describes the research, development and distribution of a filter used by thousands of people in Bangladesh to obtain arsenic-free safe water. The filter removes arsenic species primarily by surface complexation reactions: =FeOH + H_2AsO_4~-→=FeHAsO_4~- + H_2O (K = 10~(24)) and =FeOH + HAsO_4~(2-)→ =FeAsO_4~(2-) + H_2O (K = 10~(29)) on a specially manufactured composite iron matrix (CIM). The filter water meets WHO and Bangladesh standards, has no breakthrough, works without any chemical treatment (pre- or post-), without regeneration, and without producing toxic wastes. It costs about $40/5 years and produce 20-30 L/hour for daily drinking and cooking need of 1-2 families. The spent material is completely non toxic-solid self contained iron-arsenate cement that does not leach in rainwater. Approved by the Bangladesh Government, about 30,000 SONO filters were deployed all over Bangladesh and continue to provide more than a billion liters of safe drinking water. This innovative filter was also recognized by the National Academy of Engineering - Grainger Challenge Prize for sustainability with the highest award for its affordability, reliability, ease of maintenance, social acceptability, and environmental friendliness, which met or exceeded the local government's guidelines for arsenic removal.
机译：饮用被自然砷污染的地下水是世界范围内的公共卫生问题。这项工作描述了过滤器的研究，开发和销售，孟加拉国成千上万的人使用该过滤器来获得无砷的安全水。过滤器主要通过表面络合反应去除砷物质：= FeOH + H_2AsO_4〜-→= FeHAsO_4〜-+ H_2O（K = 10〜（24））和= FeOH + HAsO_4〜（2-）→= FeAsO_4〜（2- ）+ H_2O（K = 10〜（29））在特制的复合铁基质（CIM）上。滤水符合WHO和孟加拉国的标准，没有突破，无需任何化学处理（处理前后），无需再生，也不会产生有毒废物。它的成本约为40/5年，每小时产生20-30 L /小时，可满足1-2个家庭的日常饮用和烹饪需求。废料是完全无毒的固体自含砷酸铁水泥，不会在雨水中浸出。经孟加拉国政府批准，在孟加拉国各地部署了约30,000个SONO过滤器，并将继续提供超过10亿升的安全饮用水。这种创新的过滤器还获得了美国工程院-格兰杰挑战奖的可持续性大奖，以其可承受性，可靠性，易维护性，社会可接受性和环境友好性获得最高奖项，达到或超过了当地政府的除砷准则。 。

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