Vinegar-amended anaerobic biosand filter for the removal of arsenic and nitrate from groundwater

JOURNAL OF ENVIRONMENTAL MANAGEMENT

卷:171

Article

Snyder, Kathryn V.^1,4  Webster, Tara M.^1,3  Upadhyaya, Giridhar^1,2  Hayes, Kim F.¹  Raskin, Lutgarde¹ 

[1] Univ Michigan, Dept Civil & Environm Engn, Ann Arbor, MI 48109 USA

[2] Carollo Engineers, Orange, CA 92626 USA

[3] Cornell Univ, Soil & Crop Sci, Ithaca, NY 14853 USA

[4] Peace Corps Volunteer, Comarca Ngabe Bugle, Panama

关键词: Nitrate;    Arsenic;    Point-of-use water treatment;    Biosand filter;   

DOI  :  10.1016/j.jenvman.2016.02.001

来源: Elsevier

【 摘 要 】

The performance of a vinegar-amended anaerobic biosand filter was evaluated for future application as point-of-use water treatment in rural areas for the removal of arsenic and nitrate from groundwater containing common ions. Due to the importance of sulfate and iron in arsenic removal and their variable concentrations in groundwater, influent sulfate and iron concentrations were varied. Complete removal of influent nitrate (50 mg/L) and over 50% removal of influent arsenic (200 mu g/L) occurred. Of all conditions tested, the lowest median effluent arsenic concentration was 88 mu g/L. Iron removal occurred completely when 4 mg/L was added, and sulfate concentrations were lowered to a median concentration <2 mg/L from influent concentrations of 22 and 50 mg/L. Despite iron and sulfate removal and the establishment of reducing conditions, arsenic concentrations remained above the World Health Organization's arsenic drinking water standard. Further research is necessary to determine if anaerobic biosand filters can be improved to meet the arsenic drinking water standard and to evaluate practical implementation challenges. (C) 2016 Published by Elsevier Ltd.

【 授权许可】

Free