饮用水应急除镉净水技术与广西龙江河突发环境事件应急处置  

Emergent cadmium removal technology for drinking water and measures for environmental accident in Guangxi Longjianghe River

作　　者：张晓健[1] 陈超[1] 米子龙[1] 王成坤[1] 

机构地区：[1]清华大学环境学院,北京100084

出　　处：《给水排水》2013年第1期24-32,共9页Water & Wastewater Engineering

摘　　要：对饮用水应急除镉技术和2012年广西龙江河突发环境事件应急处置进行了技术总结。首先归纳了应急除镉的技术原理、工艺控制条件和实施要点,然后概括介绍了有关龙江河突发环境事件,对其应急处置的措施和效果进行了全面总结。在此次事件中,通过采取河道投药进行弱碱性化学法沉镉处置和下游汇流调水稀释的措施,实现了把含镉污染水团控制在龙江河河段范围内、下游柳江镉浓度不超标的控制目标要求。对于河道沉镉处置可能产生的环境影响做了详细说明,并总结了环境后评估的初步结果。在龙江河突发环境事件中除了最严重的镉污染外,还含有砷、铊、锑等多种污染物,自来水厂应急处理的难度极大。在水专项应急处理课题研究的基础上,通过采取针对性措施,实现了下游柳州自来水厂出水的全面达标,保障了供水安全。The emergent cadmium removal technologies in drinking water and the measures for envi ronmental accident in Guangxi Longjianghe River in 2012 were summarized. Firstly, the principles of the e- mergent cadmium removal technology, control condition and application key points of the process were summarized; then the environmental accident in Longjianghe River was generally introduced, and the cor responding emergency measures and effects were summarized comprehensively. Through alkaline and alu- minum coagulant were added in the river to settling cadmium and dilution was made downstream, the in- fluence area of cadmium pollution was controlled in Longjianghe River and the cadmium concentration in downstream Liujiang River met the requirement of both environment and drinking water. The environmen- tal influence of settled cadmium in the river was evaluated and results were presented. Apart from cadmi- um, other pollutants, such as arsenic, thallium and antimony were existed in the river and made great challenge to drinking water treatment. With research results supported in the National Water Pollution Control and Managenent Technology Major Project on emergent drinking water treatment and by taken specific emergent treatment, drinking water from water treatment plant of Liuzhou City successfully met drinking water standards in all items and guaranteed drinking water safety.

关 键 词：镉污染 应急处理 龙江河突发环境事件 

分 类 号：TU991.2[建筑科学—市政工程]