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PAGE  学 士 学 位 论 文 系 别： 生 命 科 学 系 学科专业： 生 物 科 学 姓 名： 刘 壮 壮 运 城 学 院 2012 年 7 月 蒜苗渣对Cr6+吸附效果的研究 系 别： 生 命 科 学 系 学科专业： 生 物 科 学 姓 名： 刘 壮 壮 指导教师： 陈 莉 运 城 学 院 2012年 7 月 蒜苗渣对Cr6+吸附效果的研究 刘壮壮 （运城学院生命科学系,山西运城,044000） 摘要：生物吸附法用于治理重金属废水污染既经济、又操作简便，已成为近年来研究的热点。本文以蒜苗渣为吸附材料，采用二次回归正交旋转组合设计、吸附等温线、吸附动力曲线、与活性炭比较的方法，研究蒜苗渣对重金属离子Cr6+的吸附作用。建立吸附率对Cr6+浓度、蒜苗渣加入量、溶液pH值、吸附温度及吸附时间五个影响因素的二次回归正交旋转组合模型。从模型推知，pH=5、温度40℃、时间2 h、浓度40 mg/L、加入量 0.5 g时有YMax=94.91%。Langmuir和Freundlich等温吸附模型都可以描述Cr(VI)在蒜苗渣上的等温吸附行为Langmuir较Freundlich更拟合。蒜苗渣吸附Cr(VI)的动力学实验表明，吸附过程符合二级动力学模型。 关键字：蒜苗渣；六价铬离子；吸附效果研究；二次回归旋转正交实验 Study on Adsorption of Chromium by Garlic Slag Liu Zhuangzhuang (Department of Life Science, Yuncheng University, Yuncheng, Shanxi, 044000) Abstract: Biological adsorption method has already become a hot spot of research in recent years. It is economic and simple operation being used for disposalling heavy metal in polluted waste water. This paper aims at studying the adsorption of Cr6 + with garlic bolt slag. In this study, Garlic slag was used as adsorption materials, and the effects of the five factors such as adsorption rate of Cr6+ concentration, garlic bolt slag quantity, the solution to pH value, adsorption temperature and adsorption time using two regression orthogonal rotating combination design, adsorption isotherm, absorption power curve, and activated carbon adsorption ability contrast were analyzed. From the model, we could conclude that the best adsorption rate was 94.14% when pH was 5, temperature was 40℃, time was 2 h, concentration was 40 mg/L, addition amount was 0.5 g. The isothermal adsorption Langmuir and Freundlich model could be described isothermal adsorption behavior of Cr (VI) in garlic bolt. Langmuir model was more fit than Freundlich. From the dynamics experiment of Garlic bolt absorption Cr (VI) , we concluded that the adsorption processes f