Lead (II) Adsorption on Chemically Modified Activated Carbon in Aqueous Solution

被引：1
|
作者：
Ogata, Fumihiko [1 ]
Iwata, Yuka [1 ]
Kawasaki, Naohito [1 ]
机构：
[1] Kinki Univ, Fac Pharm, 3-4-1 Kowakae, Higashiosaka, Osaka 5778502, Japan
来源：
E-JOURNAL OF SURFACE SCIENCE AND NANOTECHNOLOGY | 2013年 / 11卷
关键词：
Lead; Adsorption; Activated carbon; Chemical modification;
D O I：
10.1380/ejssnt.2013.93
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
In the present study, we developed modified activated carbon (KL) for the adsorption of Pb (II). Chemically modified activated carbons (KL-A and KL-B) were prepared by nitric acid and ethylenediamine treatments, respectively. The properties (specific surface area, pore volume, mean pore diameter, acidic or basic functional groups, and pH) of KL, KL-A, and KL-B were investigated by various methods. Contact time, adsorption isotherms, and recovery of Pb (II) were evaluated. Equilibrium adsorption on KL and KL-B or KL-A was reached in about 12 h and 5 h, respectively. The experimental data was fitted to pseudo-second order model and compared with the pseudo-first order model. The optimal pH conditions for the adsorption of Pb (II) was pH = 5.1-5.5. These data were fitted to Freundlich and Langmuir models. Moreover, the adsorption mechanism of Pb (II) on KL-A was related to the ion exchange with acidic functional groups. It would be possible to recover Pb (II) by using nitric acid. The results suggest that KL-A would be useful in the adsorption of Pb (II).
引用
收藏
页码：93 / 98
页数：6
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