中文摘要：

利用高铁酸盐的氧化絮凝双重水处理功能，取代氧化铁盐法，对其氧化除砷效果进行了评价．考察了高铁酸盐除砷的适宜pH值范围、氧化时间和絮凝时间，定性和定量分析了盐度、硬度等因素对高铁酸盐除砷效果的影响．结果表明，高铁酸盐与砷浓度比为15：1，最佳pH为5．5～7．5，适宜的氧化时间为10min，絮凝时间为30min，处理后的水样中砷残留量可达到国家饮用水标准；盐度和硬度不干扰除砷过程．与传统的铁盐法和氧化铁盐法对比，此方法简便，高效，无二次污染，更有利于饮用水的清洁化除砷。

英文摘要：

Ferrate is multi-functlon agent in water treatment and shows great oxidizing ability and excellent purifying effect. This experiment evaluated the performance of ferrate for arsenic removal. Experimental results show that the best rate of ferrate and arsenic（ Ⅲ ） is 15：1, the efficiency of As removal can be achieved 98% ,and the residual concentration of As3 ＋ is 〈0.05mg/L. The optimum pH is 5.5 - 7.5. The oxidative and coagulation time is 10 min and 30 min respectively. The salinity and hardness did not interfere with removal arsenic. This method is easy, very effective comparing with ferric method and KMnO4-Ferric method.