Sorbents for Removal of Arsenic and Heavy Metals

描述（由申请人提供）：最近美国环境保护署（EPA）宣布饮用水中最大砷含量为十亿分之十（ppb）的国家标准，为此，ADA技术公司提议开发一种新型、低成本的吸附剂，用于去除饮用水中的砷和其他重金属。美国水协会组建了一个项目小组，他们的经验和技能相辅相成，以开发吸附剂并将其包装起来，用于小型和大型水处理系统。该吸附剂将结合ADA公司的新技术，对基质粘土材料进行化学改性，以增加其对砷的吸收能力，并结合德州农工大学的新兴技术，将粘土与沙子或其他材料结合，从而增加吸附剂的孔隙率，并允许其用于水处理。德克萨斯农工大学的这项技术是在NIEHS的超级基金基础研究计划（SBRP）资助下开发的，解决了本提案回应的征求书中的一项建议。国际知名建筑/工程公司CH2M-Hill的专业知识将被用于包装新型吸附剂的配置，适用于商业规模的水处理系统。

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.