Techno-economical evaluation of fluoride removal by electrocoagulation process: Optimization through response surface methodology
Techno-economical evaluation of fluoride removal by electrocoagulation process: Optimization through response surface methodology
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DOI：
10.1016/j.desal.2010.12.033
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发表时间：
2011-04-15
期刊：
影响因子：
9.9
通讯作者：
Arami, M.
中科院分区：
文献类型：
--
作者：
Behbahani, M.;Moghaddam, M. R. Alavi;Arami, M.
本研究应用响应面法(RSM)评价了初始pH、初始氟浓度、电流密度和反应时间等主要操作变量对电絮凝除氟效果的影响及其相对运行成本。结果表明，初始pH值对除氟效率和运行成本影响不大。随着初始氟浓度的降低，除氟效率提高，但对运行成本影响不大。另一方面，电流密度和反应时间的增加严重影响了工艺性能，提高了除氟效率和运行成本。方差分析结果表明，模型对除氟效率和运行成本的R2值分别为96.5%和97.3%。结果表明，除氟的最佳初始pH为7、初始氟浓度为25 mg/L、电流密度为0.0167 A/cm(2)、反应时间为25min。实验表明，在最佳条件下，除氟效率为94.5%，与模型预测结果(90%)接近。(C)2010爱思唯尔B.V.保留所有权利。
In this research, response surface methodology (RSM) was applied to evaluate the effect of main operational variables including initial pH, initial fluoride concentration, current density and reaction time for the removal of fluoride and its relative operating costs by electrocoagulation. It was found that the effect of initial pH was negligible on fluoride removal efficiency and operating costs. With the decrease of initial fluoride concentration, fluoride removal efficiency improved; however, it had no effect on operating costs. On the other hand, the increase of current density and reaction time severely influenced process performance and increase fluoride removal efficiency and operating costs. According to the ANOVA (analysis of variance) results, the models presented the high R-2 values of 96.5% and 97.3% for fluoride removal efficiency and operating costs, respectively. The optimum initial pH, initial fluoride concentration, current density and reaction time were found to be 7, 25 mg/l, 0.0167 A/cm(2), 25 min, respectively, for the removal of fluoride. Fluoride removal efficiency of 94.5% was observed in the experiment at optimum conditions which confirmed close to model predicted (90%) result. (C) 2010 Elsevier B.V. All rights reserved.