Prediction of Arsenic Removal by Electrocoagulation: Model Development by Factorial Design
Publication: Journal of Hazardous, Toxic, and Radioactive Waste
Volume 15, Issue 1
Abstract
Model was developed by two-level five-factor full-factorial designed-experiment to predict arsenic removal from contaminated water by electrocoagulation. Five factors, namely arsenic concentration (As), solution volume ; current , electrode area , and current processing time were investigated. Among the factors, arsenic concentration (As) and volume have negative effect, and area , time , and current have positive effect on arsenic removal. Within the studied levels of the factors, variance analysis at 5% significance level indicated that electrode area is not significant in arsenic removal by electrocoagulation. The model predicted reasonably good arsenic removal from low (0.288 mg/L) and high (0.882 mg/L) initial arsenic concentrations in presence of naturally cooccurring solutes in the groundwater. For the range of operating variables studied, optimum removal of arsenic (98.56%) is obtained at higher arsenic concentration (1.18 mg/L), lower volume (1 L), higher current (3 A), and higher current processing time (120 s).
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Information
Published In
Journal of Hazardous, Toxic, and Radioactive Waste
Volume 15 • Issue 1 • January 2011
Pages: 48 - 54
Copyright
© 2011 ASCE.
History
Received: May 14, 2010
Accepted: Aug 11, 2010
Published online: Aug 31, 2010
Published in print: Jan 2011
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