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电芬顿法降解低含盐量反渗透浓缩液中腐植酸
孟海玲,刘庭蕾,刘再亮,朱丽莎,等
作者单位地址
孟海玲 安徽工业大学能源与环境学院 安徽马鞍山安雨山区徽工业大学东区
刘庭蕾 安徽工业大学能源与环境学院 安徽马鞍山雨山区安徽工业大学东区
刘再亮 安徽工业大学能源与环境学院 
朱丽莎 安徽工业大学能源与环境学院 
摘要:
采用碳毡-Pt电芬顿体系处理模拟低含盐量反渗透浓缩液中的腐殖酸。结果表明:使用电芬顿法降解模拟反渗透浓缩液,较低的含盐量有助于COD的去除。通过单因素实验,以COD去除率为评价指标,以Fe2+添加量、曝气速率、电流密度、pH值为考察因素,探讨了不同反应条件对电芬顿体系H2O2的产量和COD去除率的影响,并探讨了电芬顿法降解有机污染物的作用机理。最佳反应条件为:曝气速率为0.3L/min,Fe2+添加量为0.1mmol/L,电流密度为3.5mA/cm2,pH = 3,在此条件下反应180min时,电芬顿体系产生的H2O2浓度为105mg/L,可使浓缩液的COD由150mg/L降至16mg/L,COD去除率达到90%。
关键词:  反渗透浓缩液  电芬顿  H2O2  COD  腐殖酸
DOI:
分类号:
基金项目:安徽省科技攻关计划项目(编号:11010401010);安徽工业大学研究生创新基金(编号:2013037)
Highly efficient degradation of humic acid in low salinity reverse osmosis concentrate by electro-Fenton process
MENG Hai-ling,LIU Ting-lei,LIU Zai-liang,ZHU Li-sha,et al
Abstract:
Degradation of humic acid in simulated low salinity reverse osmosis concentrate was conducted by electro-Fenton process with carbon felt–Pt as electrode. Results showed that higher COD removal rate could be obtained with lower salinity within reverse osmosis concentrate. The factors influencing the production of H2O2 and COD removal were investigated and the results showed that the electro-Fenton process could effectively degrade contaminants. The degradation mechanism of electro-Fenton was also discussed in this paper. Under an optimum conditions (air flow rate 0.3 L/min, Fe2+ dosage 0.1 mmol/L, current density 3.5 mA/cm2, and pH 3), the concentration of H2O2 produced by the electro-Fenton process reached 105 mg/L within 180 min, resulting in the concentration of COD reduced from 150 mg/L to 16 mg/L, the COD removal percentage approached 90%.
Key words:  reverse osmosis concentrate  electro-Fenton  H2O2  COD  humic acid