| 酸甲醛改性花生壳吸附Pb2+的动力学和热力学研究 |
| |
| 引用本文： | 宋应华,龚利云.酸甲醛改性花生壳吸附Pb2+的动力学和热力学研究[J].环境科学与技术,2011,34(8):57-60. |
| |
| 作者姓名： | 宋应华 龚利云 |
| |
| 作者单位： | 重庆工商大学环境与生物工程学院,重庆,400067 |
| |
| 摘 要： | 以花生壳为原料,甲醛为改性剂,对花生壳进行改性制备吸附剂,并对其吸附水溶液中Pb2+的动力学和热力学特性进行了研究.结果表明.在298 K温度下,花生壳对Pb2+的吸附符合拟二级动力学方程,颗粒内扩散过程为吸附的主要速率控制步骤.在实验温度下,改性花生壳对Pb2+的吸附平衡符合Langmuir等温方程,热力学研究表明,...
|
| 关 键 词： | 花生壳 铅 吸附动力学 吸附热力学 |
Kinetics and Thermodynamics for Pb~(2+) Adsorption by Acidic Formaldehyde Modified Peanut Hull |
| |
| SONG Ying-hua,GONG Li-yun.Kinetics and Thermodynamics for Pb~(2+) Adsorption by Acidic Formaldehyde Modified Peanut Hull[J].Environmental Science and Technology,2011,34(8):57-60. |
| |
| Authors: | SONG Ying-hua GONG Li-yun |
| |
| Institution: | SONG Ying-hua,GONG Li-yun(Institute of Environmental and Biological Engineering,Chongqing Industrial and Commerce University,Chongqing 400067,China) |
| |
| Abstract: | Peanut hull which was modified by formaldehyde in acidic solution was used to adsorb Pb2+,with the study of adsorption kinetics and thermodynamics of Pb2+ from aqueous solution.Results indicated that under the temperature of 298 K,the adsorption of Pb2+ by modified peanut hull followed the pseudo-second order kinetic model.At the experimental temperature,thermodynamics adsorption data were well described by Langmuir adsorption isotherm equation,with the enthalpy as 19.67 kJ/mol and entropy as 77.71 J/(mol·K),and the thermodynamics indicated the adsorption process is a spontaneous endothermic nature. |
| |
| Keywords: | peanut hull lead kinetics thermodynamics |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
