Climate Change Data Portal
DOI | 10.1016/j.watres.2015.03.004 |
Regeneration of iron-based adsorptive media used for removing arsenic from groundwater | |
Chen, Abraham S. C.1; Sorg, Thomas J.2; Wang, Lili3 | |
发表日期 | 2015-06-15 |
ISSN | 0043-1354 |
卷号 | 77页码:85-97 |
英文摘要 | Adsorptive media technology is regarded as a simple, low cost method of removing arsenic from drinking water particularly for small systems. Currently, when the effluent of a treatment system reaches the USEPA maximum contaminant level (MCL) of 10 ug/L, the exhausted media is removed and replaced by new virgin media. Although the commonly used iron-based media products are reasonable in price, the replacement cost accounts for around 80% of the systems total operational costs. One option to media replacement is on-site regeneration and reuse of the exhausted media. To determine whether an iron based media can be successfully regenerated and reused, laboratory batch and column regeneration tests were conducted on six exhausted iron-based media products obtained from six full scale arsenic removal treatment systems. Batch tests conducted on three of the media products to evaluate the effectiveness of 1-6% caustic regenerant solutions found that arsenic desorption increased until around 4%. Using 4% caustic solutions, the columns tests on the six exhausted media products showed arsenic removals ranged from 25 to 90% with the best results obtained with the Severn Trent E33 media. Exposing the media to caustic (pH >= 13) and acid (pH <= 2) solutions found minimal media loss with the caustic solution, but significant media dissolution with a pH 2 acid solution. A six column pilot plant test at an Ohio test site with the lab regenerated media products found that the regenerated media could achieve arsenic removals somewhat similar to virgin media. (c) 2015 Elsevier Ltd. All rights reserved. |
英文关键词 | Arsenic;Iron media;Regeneration;Laboratory tests |
语种 | 英语 |
WOS记录号 | WOS:000355040000008 |
来源期刊 | WATER RESEARCH
![]() |
来源机构 | 美国环保署 |
文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/56939 |
作者单位 | 1.ALSA Tech LLC, North Potomac, MD 20878 USA; 2.US EPA, Cincinnati, OH 45268 USA; 3.US EPA, Washington, DC 20460 USA |
推荐引用方式 GB/T 7714 | Chen, Abraham S. C.,Sorg, Thomas J.,Wang, Lili. Regeneration of iron-based adsorptive media used for removing arsenic from groundwater[J]. 美国环保署,2015,77:85-97. |
APA | Chen, Abraham S. C.,Sorg, Thomas J.,&Wang, Lili.(2015).Regeneration of iron-based adsorptive media used for removing arsenic from groundwater.WATER RESEARCH,77,85-97. |
MLA | Chen, Abraham S. C.,et al."Regeneration of iron-based adsorptive media used for removing arsenic from groundwater".WATER RESEARCH 77(2015):85-97. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。