甲醛交联板栗壳色素树脂吸附水中Cu(II)的性能研究
Adsorption of Cu(II)in water by formaldehyde crosslinked chestnut shell pigment resin
姚先富 1周咪1
作者信息
- 1. 西南林业大学 西南山地森林资源保育与利用教育部重点实验室, 云南 昆明 650224
- 折叠
摘要
研究用农林剩余物板栗壳提取板栗壳色素,将板栗壳色素与甲醛进行交联合成甲醛交联板栗壳色素树脂.采用震荡平衡批处理法研究了pH、吸附质浓度、温度、吸附时间对复合材料吸附水中Cu(II)的影响;利用准一级动力学、准二级动力学模型拟合了吸附动力学数据,并用Langmuir,Freundlich等温线对吸附平衡数据进行拟合.结果表明:复合材料吸附Cu(II)的最佳pH为 6;最佳吸附温度为 300 K,吸附过程为放热反应;吸附在 60 min基本达到平衡;动力学数据符合准二级动力学模型,以化学吸附占主导.等温平衡符合Langmuir模型,为单层吸附,在300 K时对Cu(II)的最大单层吸附量为 30.49 mg/g.
Abstract
Chestnut shell pigment was extracted from agricultural and forestry chestnut shell residue and synthesized into formaldehyde crosslinked chestnut shell pigment resin.The effects of pH,adsorbate concentration,temperature and adsorp-tion time on the adsorption of Cu(II)in water were studied by oscillating balanced batch method.Quasi-first-order and qua-si-second-order kinetic models were used to fit the adsorption kinetic data,and Langmuir and Freundlich isotherm were used to fit the adsorption equilibrium data.The results showed that the optimum pH of Cu(II)adsorption was 6,the opti-mal adsorption temperature was 300 K,and the adsorption process was exothermic.The adsorption basically reached equi-librium in 60 min.The kinetic data were consistent with the quasi-second-order kinetic model,which was dominated by chemisorption.The isothermal equilibrium conformed to the Langmuir model,which was monolayer adsorption,and the maximum monolayer adsorption of Cu(II)at 300 K was 30.49 mg/g.
关键词
板栗壳色素/甲醛/树脂/吸附/Cu(II)Key words
Chestnut shell pigment/Formaldehyde/Resin/Adsorption/Cu(II)引用本文复制引用
基金项目
云南省农业基础研究联合专项(2008FG001-008)
出版年
2024
NETL
NSTL
万方数据