中文摘要：

重金属废水排放不仅造成资源浪费,而且已成为饮用水源最大的安全隐患之一,其治理一直是世界环保领域的重大课题.为了顺应我国新的《生活饮用水卫生标准》（GB5749-2006）,即将《生活饮用水卫生标准》（GB5749-85）中砷标准从0.05 mg/L降低到0.01 mg/L,本课题选择废麦糟作为生物吸附剂的原料,以工业废水中具有代表性的阴离子砷（Ⅲ）为处理对象,采用微波改性麦糟作为吸附剂,对低浓度含砷水进行试验研究.确定最佳改性条件为低火强度下改性7 min.在pH值为9,微波改性麦糟投加量10 g/L条件下,初始浓度为0.5 mg/L的含砷水可在35 min达到吸附平衡,最高去除率达到99.4%.微波改性麦糟对砷的吸附动力学行为符合准二级方程.

英文摘要：

The discharge of wastewater containing heavy metals is one of the major security risks for drinking water. The heavy-metal polluted waste water treatment has long been a focus for environmental protection researchers. The new Standard for Drinking Water Quality （GB5749-2006） reduces arsenic concentration from 0.05 mg/L to 0.01 mg/L. This paper studies the treatment of low concentration arsenic （m） water, arsenic being a representative anion in industrial wastewater by applying spent grains modified by microwave as biosorbent. The optimal modified conditions of spent grains were low-fire microwave for 7 rain. Arsenic removal rate reaches 99.4 % in the waste water （ pH=9, modified spent grains 10 g/L, initial arsenic concentration 0.5 mg/L, biosorption reaction 30 min）. The arsenic adsorption kinetics of microwave modified spent grains conforms to quasi-second kinetics equation.