Adsorption behavior of cross-linked chitosan modified by graphene oxide for Cu(II) removal
来源期刊：中南大学学报(英文版)2014年第7期
论文作者：YANG Yan(杨焰) WU Wen-qin(武文琴) ZHOU Hai-hui(周海晖) HUANG Zhong-yuan(黄中原) YE Ting-ting(叶婷婷) LIU Rui(刘瑞) KUANG Ya-fei(旷亚非)
文章页码：2826 - 2831
Key words：chitosan; graphene oxide; adsorption; Cu(II)
Abstract: Cross-linked chitosan(CS), cross-linked chitosan/graphene(CS/RGO10) and cross-linked chitosan/graphene oxide(CS/GO10) were prepared as adsorbents for Cu(II). The effects of pH, contact time, adsorbent dosage and initial concentration of Cu(II) on the adsorbing abilities of CS,CS/RGO10 and CS/GO10 to Cu(II) were investigated. The results demonstrate that the adsorption capacities of CS/GO10 and CS/RGO10 are greater than that of CS, especially at pH 5.0 and the adsorption capacities are 202.5, 150 and 137.5 mg/g, respectively. Their behaviors obey the Freundlich isotherm model very well. Additionally, CS/GO10 has the shortest time to achieve adsorption equilibrium among them and can be used as a perspective adsorbent for Cu(II).
YANG Yan(杨焰)1, 2, WU Wen-qin(武文琴)1, ZHOU Hai-hui(周海晖)1, HUANG Zhong-yuan(黄中原)1, YE Ting-ting(叶婷婷)1, LIU Rui(刘瑞)1, KUANG Ya-fei(旷亚非)1
(1. College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China;
2. College of Materials Science and Engineering, Central South University of Forestry and Technology,
Changsha 410004, China)
Abstract:Cross-linked chitosan(CS), cross-linked chitosan/graphene(CS/RGO10) and cross-linked chitosan/graphene oxide(CS/GO10) were prepared as adsorbents for Cu(II). The effects of pH, contact time, adsorbent dosage and initial concentration of Cu(II) on the adsorbing abilities of CS,CS/RGO10 and CS/GO10 to Cu(II) were investigated. The results demonstrate that the adsorption capacities of CS/GO10 and CS/RGO10 are greater than that of CS, especially at pH 5.0 and the adsorption capacities are 202.5, 150 and 137.5 mg/g, respectively. Their behaviors obey the Freundlich isotherm model very well. Additionally, CS/GO10 has the shortest time to achieve adsorption equilibrium among them and can be used as a perspective adsorbent for Cu(II).
Key words:chitosan; graphene oxide; adsorption; Cu(II)
