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Statistical optimizing of electrocoagulation process for the removal of Cr(VI) using response surface methodology and kinetic study
Arabian Journal of Chemistry ( IF 6 ) Pub Date : 2020-09-01 , DOI: 10.1016/j.arabjc.2020.07.009
Sunil R. Patel , Sachin P. Parikh

Abstract Optimization of electrocoagulation (EC) using copper electrode in terms of Cr(VI) removal from simulated waste water was executed by applying surface methodology and kinetic study. In this research, electrocoagulation process was applied to evaluate the outcome of operational parameters such as initial Cr(VI) concentration, pH, electrode distance, current density and supporting electrolyte (NaCl) concentration for the removal of Cr(VI). The experimental results showed that current density of 41.32 A/m2, electrode distance of 1.4 cm, initial pH of 5.65, time of electrocoagulation of 40 minutes and initial conductivity 0.21 ms are the optimal operating parameters to attain 93.33% removal efficiency of Cr(VI) ions from simulated waste water. The high value of R2 = 98.15 and R2adj = 96.49 show that fitted model confirms a good agreement with the real and predicted Cr(VI) removal percentage. It was concluded that Cr(VI) ion removal follows the first-order kinetic model by kinetic study of EC process.

中文翻译:

使用响应面法和动力学研究去除 Cr(VI) 的电凝过程的统计优化

摘要 通过应用表面方法和动力学研究,从模拟废水中去除 Cr(VI) 方面对使用铜电极的电凝聚 (EC) 进行了优化。在这项研究中,电凝过程用于评估操作参数的结果,例如初始 Cr(VI) 浓度、pH、电极距离、电流密度和支持电解质 (NaCl) 浓度以去除 Cr(VI)。实验结果表明,电流密度41.32 A/m2、电极间距1.4 cm、初始pH 5.65、电凝时间40 min、初始电导率0.21 ms是达到93.33%去除Cr(VI)效率的最佳操作参数。 ) 来自模拟废水的离子。R2 = 98.15 和 R2adj = 96 的高值。图 49 表明拟合模型与真实和预测的 Cr(VI) 去除百分比非常吻合。通过EC过程的动力学研究得出结论,Cr(VI)离子的去除遵循一级动力学模型。
更新日期:2020-09-01
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