摘要
在常规工艺基础上,通过投加氢氧化钠,实验进行了应急去除重金属镉的研究。实验结果表明,该方法能有效去除饮用水水源的镉,效果稳定,可进行应急处理。对pH、镉初始浓度和混凝剂投加量3个影响因素的灰色关联分析表明,3个因素对镉去除效果影响的大小排序为:滤后水pH>混凝剂投加量>镉初始浓度。在水源镉突发污染时,在原有常规水处理工艺基础上,通过控制滤后水pH可实现对重金属镉的去除,pH的控制值与水源水质有关。
With sodium hydroxide being added into conventional water treatment process, the study on cadmium removal in polluted water was carried out. The resuhs showed that the method removed cadmium effectively and steadily, which can be used in emergency treatment. Affecting factors of pH, cadmium concentration and coagulant dosage were analyzed by gray correlation analysis. The analysis indicated that gray correlation grade of affecting factors was pH in effluent of filtration 〉 coagulant dosage 〉 cadmium concentration. When cadmium pollution happens in source water, cadmium is removed by adjusting the pH in effluent of filtration in conventional water treatment. The control value of pH is relevant to source water quality.
出处
《环境工程学报》
CAS
CSCD
北大核心
2013年第3期848-852,共5页
Chinese Journal of Environmental Engineering
基金
国家"水体污染控制与治理"科技重大专项(2008ZX07420-005)
天津市科技支撑项目(11ZCKFSF01700)
关键词
化学沉淀法
镉
应急处理
氢氧化钠
灰色关联分析
chemical precipitation
cadmium
emergency treatment
sodium hydroxide
gray correlation a-nalysis
