Sorbents for Removal of Arsenic and Heavy Metals

描述(由申请人提供)：美国环境保护署(EPA)最近宣布确认饮用水中砷含量最高为百万分之十(Ppb)的国家标准，ADA Technologies，Inc.建议开发一种新型、低成本的吸附剂并将其商业化，用于去除饮用水中的砷和其他重金属。ADA已经组建了一个具有互补经验和技能组合的项目团队，以开发吸着剂并将其打包用于小型和大型水处理系统。该吸附剂将结合ADA的新技术，对基质粘土材料进行化学修饰，以增加其对砷的容量，以及德克萨斯A&M的新兴技术，将粘土结合到沙子或其他材料上，从而增加吸附剂的孔隙度，并允许其在水处理中使用。德克萨斯A&M技术是在NIEHS的超级基金基础研究计划(SBRP)下由NIEHS提供资金开发的，旨在解决招标中的一项建议，本提案对此做出了回应。CH2M-Hill是一家国际知名的建筑/工程公司，该公司将利用其专业知识，将这种新型吸附剂包装成可用于商业规模水处理系统的配置。 该项目的总体目标是展示使用改进的粘土吸附技术从地下水中经济有效地去除砷。具体活动包括准备几种新型吸着剂的变种，完成实验室测试以优化两种尺寸的原型硬件的配方、设计和制造，以及在科罗拉多州圣路易斯山谷的砷污染水域进行为期十个月的现场试验，该地区的砷含量超过了美国环保局的新标准。

DESCRIPTION (provided by applicant): In response to the recent Environmental Protection Agency (EPA) announcement that affirmed a national standard for maximum arsenic content in drinking water of 10 parts per billion (ppb), ADA Technologies, Inc. is proposing to develop and commercialize a novel, low-cost sorbent for the removal of arsenic and other heavy metals from drinking water. ADA has assembled a project team with a complementary mix of experience and skills to develop the sorbent and to package it for use in small and large-scale water treatment systems. The sorbent will combine novel technology from ADA to chemically amend a substrate clay material to increase its capacity for arsenic with emerging technology from Texas A&M to bind the clay to sand or other materials that increase the porosity of the sorbent and allow its use in water treatment. The Texas A&M technology has been developed with funding from the NIEHS under the Superfund Basic Research Program (SBRP), addressing one of the recommendations in the solicitation to which this proposal responds. The expertise of CH2M-Hill, an internationally known architect/engineering firm, will be tapped to package the novel sorbent in configurations that are amenable to use in commercial-scale water treatment systems. The overall goal of the project is to demonstrate the cost-effective removal of arsenic from groundwater using the amended clay sorbent technology. Specific activities include the preparation of several variants of the new sorbent, completion of laboratory tests to optimize the formulation, design and fabrication of prototype hardware in two sizes, and ten-month field trials of both pilots on arsenic-contaminated waters in Colorado's San Luis Valley, an area with arsenic content in excess of the new EPA standard.