米糠对Mn(Ⅱ)的吸附行为及其在废水处理中的应用  

The Adsorption Behaviour of Mn(Ⅱ) on Rice Bran and Its Application in Wastewater Treatment

作　　者：喻德忠[1] 蔡浩[1] 汪国庆[1] 艾军[1] 

机构地区：[1]武汉工程大学化工与制药学院绿色化学过程省部共建教育部重点实验室,湖北武汉430073

出　　处：《中国锰业》2013年第1期31-34,共4页China Manganese Industry

基　　金：国家自然科学基金资助项目(51178360)

摘　　要：研究了米糠对Mn(Ⅱ)的吸附行为,系统探讨了pH值、吸附时间和米糠用量对吸附效果的影响,同时探讨了洗脱条件。结果表明:室温下,在pH=10.1时米糠对Mn(Ⅱ)的吸附率达到97%以上,最大吸附量为2.11 mg/g;用0.2 mol/L盐酸溶液可完全洗脱米糠所吸附的Mn(Ⅱ)。在实验条件下,米糠对Mn(Ⅱ)的吸附符合Langmuir和Freundlich等温吸附方程式,但Langmuir方程更能准确反映该吸附过程。米糠应用于环境水样中Mn(Ⅱ)的处理后,水中残留Mn(Ⅱ)的浓度远小于Mn(Ⅱ)的排放标准。此研究对痕量Mn(Ⅱ)的分离、富集及含锰废水处理均有较高的参考价值。The adsorption behaviour of Mn （ Ⅱ ） on rice bran was investigated. Parameters affecting adsorption, including pH, adsorption time and the quantity of rice bran, were evaluated in details. Meanwhile, the elution conditions was also investigated. Results of experiments indicate that the adsorption rate of Mn （ Ⅱ ） on rice bran is up to 97% when the adsorption pH is 10.1, and the saturation adsorption Qm is up to 2.11 mg/g . Within the experimental condition, the adsorption of Mn （ Ⅱ） on rice bran is in accordance with the Langmuir and the Freundlich isothermal adsorption equation, but the Langmuir gives the better fit to the experiment data. The method was applied to treat Mn（ Ⅱ） in environmental water and satisfactory results were gained. The study has important value in separation, enrichment and treatment of trace manganese.

关 键 词：米糠 吸附 锰 等温线 

分 类 号：X52[环境科学与工程—环境工程] TD926.5[矿业工程—选矿]