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首页> 外文会议>TMS(The Minerals, Metals amp; Materials Society) Annual Meeting; 20050213-17; San Francisco, CA(US) >MEETING ARSENIC STANDARDS IN DRINKING WATER BY JANUARY 2006: A REVIEW OF AVAILABLE TECHNOLOGIES
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MEETING ARSENIC STANDARDS IN DRINKING WATER BY JANUARY 2006: A REVIEW OF AVAILABLE TECHNOLOGIES

机译：到2006年1月满足饮用水中的砷标准：现有技术的回顾

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摘要

Arsenic occurs naturally in rocks and soils, water, air, plants and animals. It can be further released into the environment through natural activities such as volcanic action, erosion of rocks and through human actions. Higher levels of arsenic tend to be found more in ground water sources than in surface water sources of drinking water. Compared to the rest of USA, western states have more systems with arsenic levels greater than 10 parts per billion (ppb). The US Environmental Protection Agency (EPA) has historically regulated arsenic in drinking water at 50 ppb, but the agency has lowered the maximum contaminant level (MCL) for arsenic to 10 ppb-to be in compliance by January 2006. This paper reviews briefly a) aqueous arsenic chemistry and removal mechanisms and b) the available treatment processes to attain the drinking water standard of 10 ppb by 2006. The combining of an appropriate removal method with an existing system depends on several factors such as nature of arsenic, the water source, existing plant equipment and processes site conditions etc. The paper also includes one or two case studies from the State of Arizona.
机译：砷自然存在于岩石和土壤，水，空气，植物和动物中。它可以通过自然活动（例如火山作用，岩石侵蚀和人类活动）进一步释放到环境中。地下水中的砷含量往往高于饮用水的地表水含量。与美国其他地区相比，西方国家的砷含量超过十亿分之十（ppb）的系统更多。美国环境保护署（EPA）过去曾将饮用水中的砷含量控制在50 ppb，但该机构已将砷的最大污染物水平（MCL）降低至10 ppb，以在2006年1月之前达到标准。 ）含水砷的化学和去除机理，以及b）到2006年可达到饮用水标准10 ppb的可用处理工艺。适当去除方法​​与现有系统的结合取决于多种因素，例如砷的性质，水源，现有工厂设备和工艺现场条件等。该文件还包括来自亚利桑那州的一两个案例研究。

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