摘要
通过配置含砷水在室温进行纳滤膜过滤,把膜出水和浓缩水同时回流到原水箱循环,水中砷浓度通过硼氢化钾还原原子荧光分光光度法测定.探讨了砷的形态、膜进水砷浓度、水中有机物浓度、无机物浓度、水的pH值等对除砷效果的影响.结果表明:纳滤膜对五价砷(As(Ⅴ))的去除率很高,一般大于90%,且明显大于对三价砷(As(Ⅲ))的去除.随着进膜水As(Ⅲ)浓度的升高,纳滤膜对其去除率下降.水的pH值影响纳滤膜对砷的去除,pH值越高,纳滤膜对砷的去除率越高.
The removal of arsenic （As） from synthetic waters by nanofiltration （NF） membranes was investigated. The effects of feed concentration, pH, other ionic compounds and natural organic matter on arsence removal were also studied. The results show that there is a large difference in the removal of As （ Ⅴ ） and As （ Ⅲ ）. The removal rate of As（Ⅴ ） was over 90%, which is higher than that of As（ Ⅲ ） with different humic acid concentration. The presence of additional salts have an impact on the removal of As （Ⅴ）. The arsenic removal rate increases with the increasing of pH values.
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2007年第4期565-568,共4页
Journal of China University of Mining & Technology
基金
国家高技术研究发展计划(863)项目(2002AA601130)
上海市重点科技攻关项目(05231208)
关键词
饮用水
砷
膜分离
纳滤膜
drinking water
arsenic
membrane separation
nanofiltration
