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As(Ⅲ)是一种高毒性的化学物质,对人体具有致癌作用。研究调查了实验室合成的纳米铁和其它几种价格低廉的吸附剂对水中As(Ⅲ)的去除效率。通过批实验对八种不同吸附材料进行了比较:自制纳米铁(ZZ-NZVI),尊业纳米铁(ZY-NZVI),活性炭(AC),铸铁屑(CSI),膨润土(B),石墨化碳黑(GCB),纳米碳(NC)和红砖(RB)。这些吸附材料对As(Ⅲ)吸附动力学速率常数顺序依次为LS-NZVI>ZY-NZVI>CSI。反应1h时,0.25g纳米铁对起始质量浓度为910g/LAs(Ⅲ)的去除率高达99%以上,被处理后的水中As(Ⅲ)浓度低于10g/L.结果表明,具有高反应活性的纳米铁将成为饮用水中砷去除非常有效的吸附材料。
As (III) is a highly toxic chemical that is carcinogenic to humans. The research investigated the removal efficiencies of As (Ⅲ) in water by using nano-iron synthesized by the laboratory and several other inexpensive adsorbents. Eight different adsorbent materials were compared through batch experiments: homemade ZZ-NZVI, ZY-NZVI, AC, CSI, B, graphitization Carbon Black (GCB), Nanocarbon (NC) and Red Brick (RB). The order of adsorption kinetics rate constant of As (Ⅲ) for these adsorbents is LS-NZVI> ZY-NZVI> CSI. When the reaction time was 1h, the removal rate of As (Ⅲ) by 0.25g nano-iron was above 99% at the initial concentration of 910g / LAs (Ⅲ), and the concentration of As (Ⅲ) in the treated water was less than 10g / L. The results showed that the high reaction rate The active nano-iron will be a very effective adsorbent for removing arsenic from drinking water.