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Assessing Arsenic Removal By Metal (Hydr)Oxide Adsoptive Media Using Rapid Small Scale Column Tests.
| 题名： | Assessing Arsenic Removal By Metal (Hydr)Oxide Adsoptive Media Using Rapid Small Scale Column Tests. |
| 作者： | westerhoff, p. k. benn, t. m. chen, a. s. c. |
| 关键词： | drinking water, metals, hydroxides, contaminants, carbon, water treatment systems, water purification, performance evaluation |
| 摘要： | The lowering of the maximum contaminant level (MCL) for arsenic in drinking water from 50 to 10 ig/L has posed significant technical and financial challenges to water treatment facilities throughout the nation. To assist small water systems (<10,000 customers) in meeting the new standard, U.S. Environmental Protection Agency (EPA) announced in October 2001 an initiative, i.e., the Arsenic Rule Implementation Research Program, to conduct, among others, a series of full-scale, on-site demonstrations of arsenic removal technologies, process modifications, and engineering approaches applicable to small systems. Of the 40 project sites under the Round 1 and Round 2 demonstration program, 23 selected adsorptive media technology because of its ease of operation. The conventional way of selecting adsorptive media has been based on the results of long-term pilot-plant studies. To reduce time required and save cost, it was desirable to develop new or utilize existing rapid, small-scale methods to evaluate media performance. Preliminary studies have been recently conducted using a rapid small-scale column test (RSSCT) method that was originally developed for evaluating the performance of granular activated carbon. / Supplementary Notes: Prepared in cooperation with Battelle, Columbus, OH. Sponsored by National Risk Management Research Lab., Cincinnati, OH. / Availability Note: Order this product from NTIS by: phone at 1-800-553-NTIS (U.S. customers); (703)605-6000 (other countries); fax at (703)605-6900; and email at orders@ntis.gov. NTIS is located at 5285 Port Royal Road, Springfield, VA, 22161, USA. |
| 总页数： | u0818；62p |
| 报告类型： | 科技报告 |
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