电化学氧化法去除废水中苯胺的工艺条件研究
Aniline Removal Process Conditions in Wastewater by Electrochemical Oxidation

DOI: 10.12677/JWRR.2019.83031, PP. 260-266

Keywords: 电化学氧化，苯胺，降解，废水处理
Electrochemical Oxidation, Aniline, Degradation, Wastewater Treatment

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Abstract:

本文研究电化学氧化法对苯胺模拟废水降解的工艺条件，考察在电化学降解过程中电流密度、废水初始浓度、pH值、反应时间、电解质氯化钠浓度对苯胺降解效果的影响。实验结果表明：苯胺降解率随着反应时间的延长而提高，反应240分钟后降解率趋于平缓；降解率随着电流密度的升高而提高，当电流密度为20 mA/cm²时，反应120分钟后苯胺去除率达到97%以上；酸性条件下苯胺的降解率最高；初始浓度为50 mg/L时反应150分钟后基本完全降解，初始浓度为100 mg/L和150 mg/L则需要电解300分钟才能完全降解；电解质氯化钠浓度对苯胺降解率的影响较大，苯胺降解率随着氯化钠浓度的增加而增加，当氯化钠浓度为0.1 mol/L时，反应150分钟后降解率可达95.17%，氯化钠浓度为0.5 mol/L时只需反应30分钟降解率即可达到95.11%。
In this paper, the aniline removal process conditions in wastewater degradation by electrochemical oxidation were studied. The effects of current density, initial concentration of wastewater, pH value, reaction time and electrolyte concentration on the aniline degradation during electrochemical treatment were investigated. The experimental results show that the degradation rate of aniline increases with the prolongation of reaction time, and the degradation rate levels off after 240 min of reaction. The aniline degradation rate increases with the increase of current density. When the current density is 20 mA/cm², the aniline removal rate reaches 97% after 120 min of reaction. The degradation rate of aniline is the highest under acidic conditions. When the initial concentration is 50 mg/L, the reaction is almost completely degraded after 150 min. The initial concentrations of 100 mg/L and 150 mg/L require 300 min of electrolysis to be completely degraded. The electrolyte NaCl concentration has a great influence on the degradation rate of aniline, and the degradation rate of aniline increases with the increase of NaCl concentration. When the NaCl concentration is 0.1 mol/L, the degradation rate can reach 95.17% after 150 min of reaction, and the degradation rate can reach 95.11% when the NaCl concentration is 0.5 mol/L.

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