马尾松树皮粉对水中Cu^(2+)的吸附  

The adsorption ability of Pinus massoniana Lamb bark power to Cu^(2+)

作　　者：姚瑶 陈瑞英[1] YAO Yao, CHEN Ruiying(College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, Chin)

机构地区：[1]福建农林大学材料工程学院,福建福州350002

出　　处：《福建农林大学学报（自然科学版）》2018年第3期313-321,共9页Journal of Fujian Agriculture and Forestry University:Natural Science Edition

基　　金：福建省科技创新平台建设项目(2008H2002)

摘　　要：以马尾松树皮粉为吸附剂,对水中的Cu^(2+)进行吸附试验,采用分光光度法测定吸附后溶液中Cu^(2+)浓度.对吸附过程进行动力学方程拟合、吸附等温线拟合、吸附热力学方程拟合,测定吸附前后树皮粉的FTIR红外光谱和化学成分,分析并探究其对水中Cu^(2+)的吸附机理.结果表明:伪二级动力学方程与Langmuir等温吸附模型可以较为准确地描述树皮粉对Cu^(2+)吸附的整个过程,该吸附过程主要为化学吸附且是吸热反应;单宁、木质素为树皮粉中主要吸附Cu^(2+)成分,且FTIR谱图证明了主要是羟基、羧基参与了该吸附过程.Pinus massoniana Lamb bark was used as a viable adsorbent for removing copper ions from aqueous solutions. The concentration of Cu^2＋in the solution after adsorption was determined by spectrophotometry. The adsorption process was fitted by kinetic equation,the adsorption isotherm and the adsorption thermodynamic equation. Pinus massoniana Lamb bark was tested for chemical composition and Fourier transform infrared spectroscopy before and after adsorption. The results were as follows： The adsorption of Cu^2＋by Pinus massoniana Lamb bark can be well described by the pseudo two order kinetic equation. Langmuir isotherm adsorption equation had better fitting effect with Pinus massoniana Lamb bark as adsorption. The adsorption was mainly chemical process and endothermic reaction. The tannin and lignin were the main components of adsorption in bark while FTIR proved that the hydroxyl and carboxyl were mainly involved in the adsorption process.

关 键 词：马尾松树皮 吸附 铜离子 化学组分 

分 类 号：X712[环境科学与工程—环境工程]