Study of tenorite (CuO) particles in removal of arsenic under natural water conditions
High levels of natural arsenic (As) found in groundwaters of many countries have raised health concerns. Thus, effective arsenic removal methods under natural water conditions will be useful. The objective of this study was to explore the potential of tenorite (CuO) mineral particles in removal of arsenic from groundwater samples across a wide range of water chemistries. Several groundwater water samples were collected from Colorado, Montana, Nevada, South Dakota, Utah, and Wyoming, USA for testing. Fifty mL of each groundwater sample was reacted with 0.5g of CuO particles without pH adjustments or preoxidation. Solutions were filtered through 0.45μm Millipore filters and clear filtrates were analyzed for arsenic with ICP-MS. Effect of pH and competing ions (e. g. phosphate, sulfate, silica) in removal of arsenic were evaluated. Results suggest that CuO particles successfully removed arsenic from samples with pH between 6 and 8.95. During the reaction CuO particles were very stable and released very small amounts of Cu into the water. Results further indicate that natural phosphate, silica, and sulfate concentrations as high as 5.89, 54.5, and 472mg/L, respectively showed no significant influence in removal of arsenic from samples. The effect of arsenic oxidation state and regeneration of used CuO particles is discussed.
Arsenic toxicity Drinking water Human health Arsenic removal
K. J. Reddy A. Viswatej T. R. Roth
Department of Renewable Resources, College of Agriculture, University of Wyoming, Laramie, Wyoming, 82071 USA,
国际会议
第九届痕量元素生物地球化学国际会议(9th International Conference on the Biogeochemistry of Trace Elements)
北京
英文
867-868
2007-07-15（万方平台首次上网日期，不代表论文的发表时间）