Optimization of Electrocoagulation Process for the Removal of Chromium from Simulated Water Using the Response Surface Methodology

IF 0.5 4区化学 Q4 CHEMISTRY, ANALYTICAL

Journal of Water Chemistry and Technology Pub Date : 2023-09-21 DOI:10.3103/S1063455X2305003X

Amitesh, Devendra Dohare, Ghoshna Jyoti, Chhaya Rekhete, Savita Dubey, Abhinesh Kumar Prajapati

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Abstract

This work is an attempt to remove Cr(VI) from simulated wastewater using electrocoagulation (EC) process where stainless steel (SS) is used as a sacrificial electrode. The central composite design (CCD) of response surface methodology (RSM) is used to optimize different operating parameters including initial pH (pH_i: 1.5–9.5), current density (j: 20.75–104.15 A/m²), electrode gap (g: 1.5–2.5 cm), and treatment time (t: 0–30 min), with respect to the removal of Cr(VI) from simulated water. The high coefficient of determination for Cr(VI) (R² = 0.9922) was found by the analysis of variance (ANOVA) between the experimental data and the predicted data using a second-order regression model. The maximum Cr(VI) removal of 88.9% was achieved at optimum conditions (pH 3.5, j = 83.3 A/m², g = 1.75 cm, and t = 24 min) as reflected by ANOVA analysis. A foam and residues analysis has also been incorporated.

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响应面法优化模拟水中电絮凝除铬工艺

本工作尝试使用不锈钢（SS）作为牺牲电极的电凝聚（EC）工艺从模拟废水中去除Cr（VI）。响应面法（RSM）的中心复合设计（CCD）用于优化不同的操作参数，包括初始pH（pHi:1.5–9.5）、电流密度（j:20.75–104.15 A/m2）、电极间隙（g:1.5–2.5 cm）和处理时间（t:0–30 min），以从模拟水中去除Cr（VI）。通过使用二阶回归模型对实验数据和预测数据之间的方差分析（ANOVA），发现Cr（VI）的高决定系数（R2=0.9922）。ANOVA分析显示，在最佳条件下（pH 3.5，j=83.3 A/m2，g=1.75 cm，t=24分钟），Cr（VI）的最大去除率为88.9%。还纳入了泡沫和残留物分析。

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来源期刊

Journal of Water Chemistry and Technology CHEMISTRY, APPLIED-CHEMISTRY, ANALYTICAL

自引率

0.00%

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审稿时长

>12 weeks

期刊介绍： Journal of Water Chemistry and Technology focuses on water and wastewater treatment, water pollution monitoring, water purification, and similar topics. The journal publishes original scientific theoretical and experimental articles in the following sections: new developments in the science of water; theoretical principles of water treatment and technology; physical chemistry of water treatment processes; analytical water chemistry; analysis of natural and waste waters; water treatment technology and demineralization of water; biological methods of water treatment; and also solicited critical reviews summarizing the latest findings. The journal welcomes manuscripts from all countries in the English or Ukrainian language. All manuscripts are peer-reviewed.