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| Optimization of the process of neutralizing iron salt for treating high arsenic acidity of waste water using response surface methodology |
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Received:November 02, 2011
Revised:May 08, 2012
Accepted:November 04, 2011
Published Online:June 13, 2012
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| DOI： |
| KeyWord:the process of neutralizing iron salt; high arsenic acidity of waste water; response surface methodology |
| Author | Institution |
| chutianfu |
Kunming university of secience technology |
| Libo Zhang |
Faculty of Metallurgy and Energy Engineering, Kunming University of Science and Technology |
| Jinhui Peng |
Kunming University of Science and Technology |
| Shaohua Ju |
Faculty of Metallurgy and Energy Engineering, Kunming University of Science and Technology |
| Bingguo Liu |
Faculty of Metallurgy and Energy Engineering, Kunming University of Science and Technology |
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| Abstract: |
| The process of neutralizing iron salt for treating high arsenic acidity of waste water was investigated.The optimum conditions for the process was determined using response surface methodology (RSM).Central composite experimental design (CCD) was employed to evaluate relationships between the input variables including dilution ratio、iron arsenic moore ratio、pH and the interaction on the arsenic content in filtrate. A second-order polynomial model was obtioned for predicting the response.Analysis of variance (ANOVA) shows that iron arsenic moore ratio and pH have the most significant influences on the arsenic content in filtrate. Over the range studied,the optimum conditions for the arsenic content in filtrate are as follow :dilution ratio1, iron arsenic moore ratio 4, pH 4,respectively.After the neutralizing iron salt process for treating high arsenic acidity of waste water,arsenic in the solution is 0.35 mg/L.The results show that predictive model is accurate and effective and the process of neutralizing iron salt for treating |
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