磁性炭／超滤工艺处理含镉微污染水源水  

Application of Magnetic Activated Carbon/UF for Cadmium Removal from Micro-polluted Source Water

作　　者：万俊力[1,2] 周准 刘思缘 雷超 栗小钡[1] 何洪波 杨轶辉 禹丽娥 WAN Jun-li;ZHOU Zhun;LIU Si-yuan;LEI Chao;LI Xiao-bei;HE Hong-bo;YANG Yi-hui;YU Li-e(School of Hydraulic Engineering,Changsha University of Science and Technology,Changsha 410114,China;Hunan Province Key Laboratory of Water,Sediment Sciences ＆ Flood Hazard Prevention,Changsha 410114,China)

机构地区：[1]长沙理工大学水利工程学院,湖南长沙410114 [2]水沙科学与水灾害防治湖南省重点实验室,湖南长沙410114

出　　处：《中国给水排水》2018年第19期6-11,共6页China Water & Wastewater

基　　金：国家自然科学基金资助项目(51509021);湖南省教育厅科学研究项目(17C0055、16C0060);大学生研究性学习和创新性实验计划项目(1203100)

摘　　要：针对湘江流域水源水的微污染现状和镉污染特征,以微絮凝砂滤-粉末活性炭/超滤组合技术为基础,提出了用磁性炭取代粉末活性炭联合超滤膜去除水中氨氮、有机污染物和微量镉的新型组合工艺。当采用磁性炭/超滤小试装置处理含镉微污染水源水时,该组合工艺运行稳定,对浊度、TOC、COD_(Mn)、氨氮和镉的平均去除率分别为97. 5%、59. 0%、51. 3%、37. 1%和99. 9%,出水水质满足《生活饮用水卫生标准》的要求。其中,磁性炭吸附对水中痕量镉的高效去除是出水镉达标的关键步骤,主要去除机理为静电吸附,并且磁性炭易于磁分离回收,通过现场高级氧化再生后可恢复其吸附性能。The current characteristic of cadmium in ＂Changsha - Zhuzhou - Xiangtan＂ section of Xiangjiang River was analyzed and the main water pollution index data at the specified sampling point was investigated. On the basis of miero-flocculation direct filtration and PAC/UF process, magnetic activated carbon （MAC） was taken to replace PAC and used to remove ammonia nitrogen, organic pollutants and Cd （ U ） from water. A lab scale device of MAC/UF process was employed to treat the micro-polluted source water containing Cd（ II ） in Xiangjiang River. The results showed that the MAC/UF process oper- ated stably and the final effluent quality met the existing national drinking water health standards. The re- moval rates of turbidity, TOC, CODMn, ammonia nitrogen and Cd（ II ） were 97.5%, 59.0% , 51.3% , 37.1% and 99.9%, respectively. MAC had excellent removal capacities towards trace Cd（ II ） in water, which made effluent meet the Standards for Drinking Water Quality. Heavy metal Cd removal meehanism was mainly electrostatic adsorption. Furthermore, MAC was easily recovered by magnetic separation and achieved high regeneration efficiency by advanced oxidation technology.

关 键 词：微污染水源水 重金属 镉 磁性炭 超滤 

分 类 号：TU991[建筑科学—市政工程]