期刊
JOURNAL OF ENVIRONMENTAL MANAGEMENT
卷 90, 期 5, 页码 1956-1961出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jenvman.2009.01.004
关键词
Slow sand filtration; Arsenic removal; Iron removal; Drinking water
资金
- Natural Sciences and Engineering Research Council of Canada
The main objective of the study was to find a suitable iron to arsenic ratio in water to reduce arsenic to 5 mu g/L or lower through sand filtration. Experiments were conducted by varying the quantity of iron(II) while keeping the arsenic concentration at 100 mu g/L A mixture of iron (II) and arsenic at different ratios (10:1, 20:1. 30:1 and 40:1) was pumped to the sand filters in a down flow mode and effluent arsenic and iron were analyzed. It was found that a ratio of iron to arsenic of 40:1 was necessary to ensure an effluent arsenic concentration of 5 mu g/L or lower. Iron in the filtrate was found to be below 0.1 mg/L at all times. (C) 2009 Elsevier Ltd. All rights reserved.
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