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为改善电芬顿对甲基橙模拟废水的处理效果，以导电炭膜作为穿透式阴极构建电化学反应器。在优化过滤通量、溶液初始p H值、电流强度、Fe2+浓度的基础上，分析了炭膜过滤通量对电芬顿系统运行效果的影响机制。结果表明：当过滤通量为100 L/(m2·h)(简写为LMH)、溶液初始p H值为3、电流强度为40 mA、Fe2+浓度为0.2 mmol/L的条件下，反应80 min后，甲基橙和总有机碳的去除率分别达到95%和66%；提高过滤通量能够显著促进甲基橙降解，过滤通量100 LMH时的一级反应速率常数与无过滤相比提高3倍；过滤能够通过加速传质、增大电极活性面积实现溶液中扩散电阻和电极内阻的降低，达到提高电流效率的效果，因此，阴极产生H_2O2及还原Fe3+的能力增强，促进了芬顿反应的发生，提高了甲基橙的去除效率。
Abstract：In order to improve the treatment efficiency of simulated wastewater containing methyl orange by electro-Fenton,a conductive carbon membrane was used as the flow-through cathode for the electrochemical reactor.The effect of permeate flux of carbon membrane,initial p H value,current density,and Fe2+concentration on the degradation of methyl orange were investigated,and the influence mechanism of the permeate flux on the operatin performance of electro-Fenton system was discussed.The results indicated that under the conditions of a permeate flux of 100 L/(m2·h)(LMH),an initial pH value of 3,a current intensity of 40 m A,and a Fe2+molar concentration of 0.2 mmol/L,the removals of methyl orange and total organic carbon after 80 minutes of reaction reached 95%and 66%,respectively.Increasing the permeate flux could significantly promote the degradation o methyl orange.When the permeate flux was 100 LMH,the first-order kinetics coefficient was 3 times higher than that without filtration.The filtration could reduce the diffusion resistance in the solution and the internal resistance of the electrode by accelerating mass transfer and increasing the active area of the electrode,thus improving the current efficiency.Therefore,the cathode produced H_2O_2and reduced Fe3+more effectively,which promoted the Fenton reaction and enhanced the methyl orange degradation.
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基本信息:
中图分类号:X703
引用信息:
[1]赵斌,蔡行知,杨鑫,等.基于炭膜阴极的电芬顿系统对于甲基橙的降解[J].天津工业大学学报,2025,44(05):36-42+51.
基金信息:
河北省自然科学基金重点项目（B2023110025）; 沧州市重点研发计划指导项目（222109009）; 沧州市天津工业大学研究院产业化项目（TGCYY-Z-0101）