摘要
使用Ti/RuO2阳极,对电氧化法降解微囊藻毒素MCLR的效能及其影响因素进行了研究.结果显示,电流密度增大有利于MCLR的降解,当电流密度为8mA/cm2,水力停留时间(HRT)为23min时,MCLR的去除率可达到100%.以0.02mol/LNa2SO4作为电解质时,MCLR降解效果较好,去除率可达到100%,而以0.02mol/LNaNO3为电解质时,MCLR降解效果较差,去除率只有50%.MCLR初始浓度对降解效率影响较大,MCLR初始浓度为3.3μg/L时,去除率可达到96%;MCLR初始浓度为198μg/L时,去除率只有60%.Na2SO4电解质浓度和水样流速对藻毒素MCLR降解效果影响不明显.
The degradation of algal toxin Microcystin-LR （MCLR） through electrochemical oxidation processes and its influence factors were studied. The degradation efficiencies depended on the current densities. The MCLR removal efficiency could reach 100% when the current density increased to 8mA/cm2 with the hydraulic retention time of 23min. The MCLR degradation under 0.02mol/L Na2SO4 electrolyte was more effective than that under 0.02mol/L NaNO3 electrolyte, with the removal efficiencies of 100% and 50% respectively. Initial concentration of MCLR influenced the electrochemical oxidation processes obviously. The removal efficiency could reach 96% with the initial concentration of MCLR being 3.3μg/L and only 60% with the initial concentration of MCLR being 198μg/L. The concentration of NazSO4 electrolyte and sample flow rate had little effect on the degradation of MCLR.
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2008年第8期709-713,共5页
China Environmental Science
基金
国家自然科学基金资助项目(50678024)
国家"863"项目(2007AA06Z301)
关键词
藻毒素
MCLR
电氧化
影响因素
algal toxin
microcystin-LR （MCLR）
electrochemical oxidation
influence factors
