摘要
采用正交试验观察了混凝沉淀除砷剂成分变化、添加物以及过滤等因素对饮水除砷效果的影响 ,并探讨了混凝除砷机理。结果表明 ,硫酸铁的除砷效果优于铁铝聚合物和聚硅酸金属盐混凝剂 ;添加活性炭粉和高岭土对除砷效果无明显促进作用 ;但混凝后过滤可提高砷去除率 ,而且砂滤为适宜的过滤处理方法 ,其效果与砂的填充高度和粒径有关。经模型拟合 ,砷的吸附模式符合Langmuir吸附等温式。提示混凝过程对砷的吸附是除砷的主要机理。
The removal of arsenic from drinking water with copolymer coagulant was investigated. The effect of the component, additive substance of the coagulant and filtration were tested by employing a orthogonal analysis. The results showed that the arsenic removal with ferric sulfate was better than that with ferric aluminum copolymer and polysilicon metal salt. Adding active carbon powder or kaoline could not enhance the efficacy of arsenic removal. However, the removal rate was improved by filtration after using coagulates, and sand filtration was feasible. The efficacy of arsenic removal could be affected by the column height filled with sand and the diameter of sand. After arsenic adsorption model fitted, the Langmuire isotherm was matched. The main mechanism of arsenic removal by coagulation should be adsorption.
出处
《卫生研究》
CAS
CSCD
北大核心
2001年第3期152-154,共3页
Journal of Hygiene Research
基金
国家"九五"科技攻关项目!(No.96 90 6 0 4 0 2 0 9)
关键词
饮水
除砷
复合型混凝剂
硫酸铁
砂滤
吸附等温式
drinking water, arsenic removal, copolymer coagulant, ferric sulfate, sand filtration, adsorption isotherm
