作　　者： ; ; ; ; ; ;

机构地区： 中国科学院生态环境研究中心环境水质学国家重点实验室

出　　处： 《环境科学学报》 2007年第12期1968-1971,共4页

摘　　要： 采用硼氢化钠还原法制备了核-壳结构的Fe-FeOxH2x-3纳米复合材料,在近紫外光和H2O2催化条件下,对饮用水消毒副产物前驱体腐殖酸的去除比纳米零价铁的去除高.说明零价铁表面铁氧化物能加速界面电子转移,提高反应效率.探讨了H2O2浓度、腐殖酸初始浓度和起始溶液pH对反应速率的影响.研究结果表明,H2O2最佳投加量为5mmol.L-1,在pH为5～9时,催化剂都显示了较高的活性;腐殖酸不但被脱色降解,而且TOC去除率达到60%,并且生成的中间产物降低了三氯甲烷的生成趋势. Core-shell Fe-FeO H2x-3 was prepared of by NaBH4 reductive methods. The catalyst showed higher activity for the removal of humic acid than Nano-zero-valent Iron in the presence of H202 under nearultraviolet （365 nm） light irradiation. The results indicated that iron oxides on the Zero-valent iron surface accelerated interface electrons transfer to enhance the reaction efficiency. The effects of the dosage of H2O2 , initial concentration of humic acid, and initial pH were investigated. The results indicated that the optimal H2 02 dosage was 5mmol· L^-1 The catalyst exhibited good catalytic activity when initial solution pH varied from 5 to 9. Humic acid was discoloration and the remove of TOC reached about 60%. The trihalomethane formation potential （THMFP） was declined after the humic acid was treated.

关 键 词： 腐殖酸 三氯甲烷生成趋势

领　　域： [环境科学与工程]