【摘要】 采用活性炭多维电极法去除水中溶解态腐殖酸。实验结果表明 ,与活性炭单纯吸附法相比 ,活性炭多维电极法可显著提高对溶解态腐殖酸的去除率 ;在连续运行条件下 ,延长水力停留时间、升高槽电压、溶液偏碱性有利于腐殖酸的去除 ;高效液相色谱分析结果表明 ,电极的氧化还原作用可使有机物分子量变小或矿化 ,因而处理系统有可能延长活性炭的使用寿命更多还原

【Abstract】 An important way to solve the problem of disinfection by_products(DBPs) of chlorination in drinking water is to remove the main precursors of DBPs_humic acids (HAs).A system which combined electro_chemical reaction with adsorption of granular activated carbon(GAC),named multi-electrodes of GAC (MEGAC), was used to remove HAs. The experiment results in successive processes showed that the system of MEGAC can remove HAs more effectively than that of GAC adsorption. The longer retention time,higher supplied voltage and higher pH value of solution were beneficial to the removal of HAs.The results of liquid chromatography showed that molecules of HAs decomposed and the molecule weights decreased in the treatment process,which may regenerate the GAC and lengthen its life span. An experimental kinetic model for the decomposition of HAs was proposed.更多还原