改性稻壳对水中亚甲基蓝的吸附性能研究  

Study on the adsorption performance of KMnO_(4) modified rice husk to treat methylene blue in dye wastewater

作　　者：闫改萌 石丹丹 张渺 党丹 王天贵[1] YAN Gai-meng;SHI Dan-dan;ZHANG Miao;DANG Dan;WANG Tian-gui(College of Chemistry and Chemical Engineering,Henan University of Technology,Zhengzhou 450001,China)

机构地区：[1]河南工业大学化学化工学院,河南郑州450001

出　　处：《化学工程师》2021年第9期35-38,共4页Chemical Engineer

基　　金：河南省教育厅自然科学项目(21A530002);河南工业大学高等教育教学改革研究与实践项目(2020年)。

摘　　要：本文评价了KMnO_(4)改性稻壳吸附剂的吸附性能。采用扫描电镜、比表面积分析仪和红外光谱仪对改性前后的稻壳吸附剂进行了表征,探究了稻壳吸附剂在不同条件下对亚甲基蓝的吸附能力,并进行了3个温度下的等温吸附实验。结果表明,KMnO_(4)改性稻壳吸附剂比表面积显著增加,是原始稻壳的10倍,表面性质也有明显变化,吸附能力几乎不受溶液pH值影响,改性稻壳对亚甲基蓝的吸附过程符合准二级动力学方程和Langmuir等温模型,最大吸附量可以达到50mg·g^(-1)以上。The purpose of this paper was to evaluate the adsorption performance of KMnO_(4) modified rice husk adsorbent. The rice husk adsorbents before and after the modification were characterized by scanning electron microscope, specific surface area analyzer and infrared spectrometer. The adsorption capacity of rice husk adsorbent for methylene blue under different conditions was explored, and isothermal adsorption experiments were performed at 3 temperatures. The results showed that the specific surface area of the KMnO_(4) modified rice husk adsorbent was significantly increased, which was 10 times of original rice husk, and the surface properties were also significantly changed. The adsorption capacity was almost independent of the pH of the solution. The adsorption process of the modified rice husk on methylene blue conformsed to the quasi-second ary kinetic equations and Langmuir isotherm model, the maximum adsorption capacity can reach more than 50 mg·g^(-1).

关 键 词：稻壳 KMnO4改性 亚甲基蓝 吸附 

分 类 号：X592[环境科学与工程—环境工程]