文献类型：期刊文献

英文题名：Competitive Adsorption of Methylene Blue and Cu2+ onto Citric Acid Modified Pine Sawdust

作者：Zhang, Ruzhuang[1];Zhou, Yanbo[1];Gu, Xiaochen[1];Lu, Jun[1]

机构：[1]E China Univ Sci & Technol, Minist Educ, Key Lab Coal Gasificat & Energy Chem Engn, Shanghai 200237, Peoples R China

年份：2015

卷号：43

期号：1

起止页码：96

外文期刊名：CLEAN-SOIL AIR WATER

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000348142700014)】；

基金：The authors would like to express their sincere gratitude to the National Natural Science Foundation of China (51208201), China Postdoctoral Science Foundation (2011M500744), and Shanghai Educational Development Foundation (11CG32) for their financial support of this study.

语种：英文

外文关键词：Binary system; Dye; Heavy metal; Modification; Wastewater treatment

摘要：Pine sawdust modified with citric acid (CA-PS) is used as an adsorbent for the removal of Cu2+ and methylene blue (MB) from the single and binary compound systems. The initial pH has a significant effect on Cu2+ adsorption, but a relatively little effect on MB adsorption. The kinetic and isotherm studies indicate that the pseudo-second-order model and the generalized model provide the best correlation of the experimental data in the single systems as well as in the binary systems. The adsorption capacities of CA-PS from Generalized isotherm model are 0.23mmol/g for Cu2+ and 0.25mmol/g for MB, which are higher than that of B-PS. In the binary systems, Cu2+ and MB exhibit competitive adsorption behaviors. The adsorption capacity of Cu2+ or MB is considerably reduced with an increase in the concentration of the other, and Cu2+ exhibits better competiveness than MB. However, the total adsorption capacity is higher compared with that in the single systems, which increases with an increase in the initial concentration of Cu2+ or MB and reaches a plateau value of 0.301mmol/g.