采用碱化稻秆作为吸附剂对溶液中的Cr(Ⅵ)进行吸附研究,室温下考察了吸附时间、pH、碱化稻秆用量、Cr(Ⅵ)初始质量浓度及粒径等因素对吸附性能的影响.结果表明,碱化稻秆具有吸附Cr(Ⅵ)的能力,且适宜的吸附条件为:吸附t为2h,pH为2,碱化稻秆用质量为1.5g,Cr(Ⅵ)初始质量浓度为20 mg/L及粒径为250 μm,吸附率可达90％以上.吸附等温线和动力学表明,Langmuir和Freundlich等温式能较好地描述碱化稻秆对Cr(Ⅵ)的吸附平衡,准二级动力学方程能较好地反映该吸附动力学,即吸附主要是单分子层的化学优惠吸附.碱化稻秆用来处理低浓度含Cr(Ⅵ)电镀废水,既可治理环境污染,又可以提高综合经济效益,有良好的应用前景.
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