椰壳活性炭孔结构对肌酐吸附性能影响及吸附动力学研究

doi:10.3969/j.issn.0253-2417.2015.03.015

林产化学与工业 ›› 2015, Vol. 35 ›› Issue (3): 85-90.doi: 10.3969/j.issn.0253-2417.2015.03.015

椰壳活性炭孔结构对肌酐吸附性能影响及吸附动力学研究

王金表¹, 蒋剑春^1,2, 孙康^1,2, 卢辛成¹, 谢新苹¹

1. 中国林业科学研究院林产化学工业研究所;生物质化学利用国家工程实验室;国家林业局林产化学工程重点开放性实验室;江苏省生物质能源与材料重点实验室, 江苏南京 210042;
2. 中国林业科学研究院林业新技术研究所, 北京 100091

收稿日期:2014-04-04 出版日期:2015-06-25 发布日期:2015-07-03
通讯作者: 蒋剑春(1955—),男,研究员,博士生导师,从事生物质能源及炭材料开发利用研究;E-mail:bio-energy@163.com。 E-mail:bio-energy@163.com
作者简介:王金表(1986—),女,河北石家庄人,硕士生,研究方向为炭材料制备及医学应用
基金资助:
中国林科院林业新技术所基本科研业务费专项资金(CAFINT2013C02)

Adsorption Behavior and Kinetic of Creatinine on Coconut Shell Activated Carbon with Different Pore Structures

WANG Jin-biao^{1,1,2,1,2,1,1}

1. Institute of Chemical Industry of Forest Products, CAF;National Engineering Lab.for Biomass Chemical Utilization; Key and Open Lab.of Forest Chemical Engineering, SFA; Key Lab.of Biomass Energy and Material, Jiangsu Province, Nanjing 210042, China;
2. Research Institute of Forestry New Technology, CAF, Beijing 100091, China

Received:2014-04-04 Online:2015-06-25 Published:2015-07-03

摘要/Abstract

摘要： 考察了具有不同孔结构的椰壳活性炭对肌酐(CR)的吸附性能,研究了比表面积、孔径分布与肌酐吸附性能的关系,采用准一级、准二级和颗粒内扩散动力学模型对吸附数据拟合处理,确定了模型参数。试验结果表明:1～2.5 nm的微孔对肌酐吸附有利,平均孔径在2.2 nm附近的椰壳活性炭肌酐吸附量为104 mg/g;活性炭对肌酐的吸附能力取决于比表面积,总孔容,微孔率的共同作用。颗粒内扩散吸附并不是唯一的速率控制过程,椰壳活性炭对肌酐的吸附过程更符合准二级动力学模型t/q_t=1/k₂q_e²+t/q_e,相关系数均在0.99以上,表明吸附过程存在化学吸附。

关键词: 椰壳活性炭, 肌酐, 吸附, 动力学

Abstract: The adsorption behaviors of creatinine(CR) on coconut-shell activated carbons with different pore structures was investigated,and the relationship between BET surface area/pore size distribution and the adsorption capacity for creatinine was studied.Several kinetic models,such as pseudo-first-order,pseudo-second-order,and intra-particle diffusion kinetic models,were studied on the basis of adsorption data.Results showed that the micropores with pore size of 1-2.5 nm were beneficial for adsorption of CR.The adsorption capacity reached 104 mg/g on the coconut-shell activated carbon with average pore size 2.2 nm. The adsorption capacity of activated carbon for creatinine depended on the combination of the surface area, total pore volume and microporosity. The intraparticle diffusion was not the only rate-determining step.It was found that the adsorption kinetics followed pseudo-second-order kinetic model,which correlation indexes were higher than 0.99.This suggested that the adsorption of CR on activated carbon was a chemisorption process.

Key words: coconut shell activated carbon, creatinine, adsorption, kinetic

中图分类号:

TQ35
TQ424.1

王金表, 蒋剑春, 孙康, 卢辛成, 谢新苹. 椰壳活性炭孔结构对肌酐吸附性能影响及吸附动力学研究[J]. 林产化学与工业, 2015, 35(3): 85-90.

WANG Jin-biao, JIANG Jian-chun, SUN Kang, LU Xin-cheng, XIE Xin-ping. Adsorption Behavior and Kinetic of Creatinine on Coconut Shell Activated Carbon with Different Pore Structures[J]. Chemistry and Industry of Forest Products, 2015, 35(3): 85-90.

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椰壳活性炭孔结构对肌酐吸附性能影响及吸附动力学研究

Adsorption Behavior and Kinetic of Creatinine on Coconut Shell Activated Carbon with Different Pore Structures

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