文献类型：期刊文献

中文题名：椰壳炭对肌酐吸附性能及动力学研究

英文题名：Adsorption characteristics for creatinine on coconut-shell activated carbon and kinetic study

作者：王金表[1] 蒋剑春[1,2] 孙康[1,2] 卢辛成[1] 谢新苹[1]

第一作者：王金表

机构：[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;[2]中国林业科学研究院林业新技术研究所

年份：2014

卷号：43

期号：6

起止页码：1013-1017

中文期刊名：应用化工

外文期刊名：Applied Chemical Industry

收录：CSTPCD;;CSCD:【CSCD_E2013_2014】；

基金：中央级公益性科研院所基本科研业务费专项资金(CAFINT2013C02)

语种：中文

中文关键词：活性炭;吸附;肌酐;动力学

外文关键词：activated carbon;adsorption;creatinine;kinetics

分类号：TQ424.1

摘要：采用水蒸气活化法制备得到微孔发达的椰壳活性炭,并研究其对肌酐的吸附性能。以850℃活化所得微孔率最高的活性炭为吸附剂,考察了活性炭投加量、吸附时间、溶液pH值及肌酐初始质量浓度对肌酐吸附性能的影响,并采用准一级、准二级动力学方程对实验数据进行拟合处理。结果表明,制备所得4种椰壳活性炭对肌酐均有较强的吸附能力;微孔率越高,吸附量越大;37℃下,椰壳活性炭对肌酐的吸附平衡时间为6 h,平衡吸附量达到97.88 mg/g;酸性环境更有利于肌酐吸附;平衡吸附量随肌酐初始质量浓度增加而升高;吸附过程符合准二级动力学模型,以化学吸附为主。
Activated carbons with abundant micropores were prepared from coconut shell by steam activation and the relationship between pore structure and adsorption characteristics for creatinine was discussed. Meanwhile,the adsorption properties to creatinine of coconut-shell activated carbon（ which was activated at 850 ℃） were studied,including activated carbon dosage,contact time,pH and initial solution concentration. To study the adsorption kinetics,the pseudo-first order and the pseudo-second order models were selected to fit the experimental data,and the equilibrium data were analyzed by the adsorption isotherms of Langmuir and Freundlich. The results showed that the activated carbon exhibited excellent adsorption performance to creatinine,and the adsorption quantity increased as the increase of BET surface and micropore ratio. Moreover,the adsorption equilibrium was reached within 6 h at 37 ℃ and its equilibrium adsorption capacity was 97. 88 mg /g,the adsorption capacity was better than that on basic condition,and the adsorption quantity increased with the rise of initial concentration of creatinine. The kinetic data was fitted well by pseudo-second order equation,which suggested that the adsorption of creatinine was a chemisorption process.