Experiment and kinetic model for methyl orange wastewater removal by electrocoagulation

ZHANG Yi; CONG Yanqing; SUN Peide

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Experiment and kinetic model for methyl orange wastewater removal by electrocoagulation

更新时间：2025-12-10

- Experiment and kinetic model for methyl orange wastewater removal by electrocoagulation
- CIESC Journal Issue 9, Pages: 2339-2345(2009)
- 作者机构：
  
  浙江工商大学环境科学与工程学院
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：05 September 2009，
  
  Published：05 September 2009
- 稿件说明：
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ZHANG Yi, CONG Yanqing, SUN Peide. Experiment and kinetic model for methyl orange wastewater removal by electrocoagulation[J]. CIESC Journal, 2009, (9): 2339-2345.
DOI：

ZHANG Yi, CONG Yanqing, SUN Peide. Experiment and kinetic model for methyl orange wastewater removal by electrocoagulation[J]. CIESC Journal, 2009, (9): 2339-2345. DOI：

摘要

采用电絮凝法处理甲基橙模拟染料废水，研究了染料脱色的影响因素及其CODCr去除动力学。考察了静置时间、槽电压、极板间距、初始浓度、pH值以及电解质浓度对甲基橙染料脱色效率的影响。结果表明，槽电压为20 V，电流为0.4 A，极板间距为2.5 cm，废水体积为500 ml，甲基橙初始浓度为500 mg·L-1，溶液pH值为3.0，电解质KCl的浓度为0.5 g·L-1时，反应10 min后甲基橙脱色率可达97 %。根据电絮凝的絮凝沉淀理论和氧化反应机理，建立CODCr去除反应动力学模型，模型与实验数据拟合较好。通过模型参数的预测可以揭示甲基橙降解主要以絮凝沉淀为主，氧化降解为辅，同时溶液中二价铁Fe(II)的增加会影响CODCr去除率的下降。

Abstract

The methyl orange (MO) simulated dye wastewater was treated by electrocoagulation. The effect of operation parameters on MO decolorization and the kinetic model of chemical oxygen demand (CODCr) removal were investigated. Operation parameters

such as input voltage

electrode distance

initial MO concentration

electrolyte concentration and pH

were investigated based on the decolorization efficiency of MO. Experimental results showed that up to 97% of color decay was obtained after 10 min reaction with input voltage of 20 V

current of 0.4 A

electrode distance of 2.5 cm

treated volume of 500 ml

initial MO concentration of 500 mg·L-1

electrolyte KCl concentration of 0.5 g·L-1 and pH of 3.0. A kinetic model for CODCr reduction was established based on the coagulation and oxidation processes. The experimental data fitted well with the model curves. The parameters predicted from the kinetic model showed that the coagulation process was the main pathway for CODCr removal and the oxidation process was the next. In addition

the increase of Fe2+ in the solution decreased the CODCr removal.

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