载铁(Ⅲ)-配位体交换棉纤维素吸附剂对饮用水中砷(Ⅴ)和氟联合去除的研究

Combined Removal of Arsenic(Ⅴ) and Fluoride from Drinking Water by Fe(Ⅲ)-loading Ligand Exchange Cotton Adsorbent

使用新型载铁 ( ) -配位体交换棉纤维素吸附剂 ,通过静态和动态吸附实验 ,研究了饮用水中砷酸钠[砷 ( ) ]和氟化钠 (氟 )联合去除的效果和浓度因素的影响以及吸附剂经过反复吸附 -洗脱再生 -再吸附后性能的稳定性 .结果表明 ,该吸附剂能够高效、高选择性地联合去除高砷 ( )和高氟 .吸附柱的饱和吸附容量可高达 1 5 mg/ g干重 ,反复使用中饱和体积的相对标准偏差小于 0 .5 % ,柱处理出水的各项有关指标均符合我国生活饮用水卫生标准 ,特别是砷 ( )的质量浓度低于 0 .0 1 0 mg/ L,符合世界健康组织 ( WHO)推荐的饮用水严格砷标准 .

The concentration effects of combined removal of arsenate and fluoride(F) were studied by novel bead Fe(Ⅲ) loading ligand exchange cotton cellulose adsorbent in batch and column experiments. As(Ⅴ) and F could be simultaneously removed by the adsorbent from drinking water highly and selectively after three adsorption regeneration readsorption cycles. The saturation adsorption capacity of As(Ⅴ) and F reached up to 15 mg/g. Indexes of effluent were in good agreement with the living drinking water health standard of China, especially the arsenic concentrations below 0.01 mg/L and satisfy WHO stringent drinking water standards. It shows that the adsorbent may be a promising adsorbent in the region of arsenic and fluoride coexisting.