Decolorization of AR18 dye solution by electrocoagulation: sludge production and electrode loss in different current densities
Decolorization of AR18 dye solution by electrocoagulation: sludge production and electrode loss in different current densities
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DOI：
10.1080/19443994.2015.1063092
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发表时间：
2016-07
影响因子：
1.1
通讯作者：
R. Khosravi;S. Hazrati;Mehdi Fazlzadeh
中科院分区：
文献类型：
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作者：
R. Khosravi;S. Hazrati;Mehdi Fazlzadeh
摘要采用实验室规模的间歇式电凝聚反应器，以铝电极为电极，对酸性红18偶氮染料进行了电凝聚去除实验研究。研究了不同参数（包括初始pH、电流密度、反应时间、染料初始浓度、电极间距和电解质溶液类型）对EC过程效率的影响。研究了电流密度对阳极消耗和污泥产生的影响。最佳条件为pH 4。随着电流密度的增加，染料的去除率显著增加，直到达到26 mA/cm 2的临界值。阳极质量减少从26 mA/cm 2电流密度下的202 mg增加到42 mA/cm 2电流密度下的331 mg。此外，污泥产量从605.85 mg增加到1,060 mg，净污泥产量为400 mg。电极间距离越短，脱色率越高。电解质溶液的种类是影响电解质含量的重要参数。
AbstractA lab-scale electrocoagulation batch reactor was used to remove acid red 18 as an azo dye by use of aluminum electrodes. The effects of different parameters including initial pH, current density, reaction time, initial dye concentration, distances between electrodes, and type of the electrolyte solution on the efficiency of EC process were investigated. The influence of the current densities on consumed anode and produced sludge was also studied. Optimum conditions were obtained at pH 4. Removal percentage of the dye was significantly increased with increasing current density until reaching to critical point of 26 mA/cm2. Anode mass reduction was increased from 202 mg at current densities of 26 mA/cm2 to 331 mg at 42 mA/cm2. Moreover, mass of produced sludge was increased from 605.85 to 1,060 mg with a net mass of 400-mg sludge production. The shorter distances between electrodes resulted in higher decolorization. Type of the electrolyte solution was an important parameter affecting the amount of ...