吡啶改性凹凸棒废渣对亚甲基蓝废水的吸附  

Adsorption of methylene blue wastewater with pyridine-modified attapulgite sediment

作　　者：梁卫东[1] 贺晓娟[1] 张硕[1] 李海风[1] 

机构地区：[1]兰州理工大学石油化工学院,甘肃兰州730050

出　　处：《兰州理工大学学报》2011年第5期74-77,共4页Journal of Lanzhou University of Technology

基　　金：国家自然科学基金(51063003);甘肃省教育厅导师基金(0903-04);兰州市科技计划项目(2010-1-3)

摘　　要：过氧化二苯甲酰为引发剂,以吡啶为单体改性凹凸棒废渣处理亚甲基蓝废水,研究吸附剂对亚甲基蓝的吸附机理以及动力学和热力学吸附性质.在实验范围内,废渣对亚甲基蓝的吸附可以用Langmuir吸附等温线描述,吸附过程符合准二级动力学方程.计算结果ΔG0<0,ΔH0<0,ΔS0<0,说明此吸附是一个自发、放热、熵减的过程.Taking dibenzoylperoxide as initiator and taking monomeric pyridine-modified attapulgite sediment as adsorbent,the methylene blue waste water was treated.The adsorption mechanism,dynamic and thermodynamic adsorption property of the methylene blue with this adsorbent were investigated.Within the range of the experiment,the adsorption behaviour could be well described by Langmuir adsorptive isotherm and the adsorption process was in good agreement with the pseudo-second-order kinetic equation.The thermodynamic data were calculated that ΔG0 0,ΔH00,ΔS00,illustrating that the adsorption of methylene blue was a spontaneous,exothermal and order-producing process.

关 键 词：吡啶 过氧化二苯甲酰 凹凸棒废渣 亚甲基蓝 动力学 热力学 

分 类 号：X703[环境科学与工程—环境工程]