Adsorption of Pb2+ on Thiol-functionalized Mesoporous Silica, SH-MCM-48

被引：1
|
作者：
Taba, P. [1 ]
Mustafa, R. D. P. [1 ]
Ramang, L. M. [1 ]
Kasim, A. H. [1 ]
机构：
[1] Hasanuddin Univ, Dept Chem, Jl Perintis Kemerdekaan,Km 10, Tamalanrea 90245, Makassar, Indonesia
来源：
2ND INTERNATIONAL CONFERENCE ON SCIENCE (ICOS) | 2018年 / 979卷
关键词：
MOLECULAR-SIEVES; REMOVAL; MCM-48;
D O I：
10.1088/1742-6596/979/1/012058
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Modification of mesoporous silica, MCM-48, by using 3-mercaptopropyltrimethoxysilane has been successfully conducted. MCM-48 and SH-MCM-48 were characterized using XRD and FTIR. SH-MCM-48 was used as an adsorbent of Pb2+ ions from solution. A number of Pb2+ ions adsorbed were studied as the function of time, pH, and concentration. The concentration of the ions after adsorption was determined by an Atomic Absorption Spectrophotometer. The removal of the adsorbed ions from the SH-MCM-48 was also studied using several desorbing agents. The result showed that the optimum time was 20 minutes and optimum pH was 4. The adsorption of Pb(II) ion followed the pseudo-second order with the rate constant of 0,2632 g"mg(-1).min(-1). Adsorption of Pb(II) ion fitted the Langmuir isotherm with the adsorption capacity of 0,1088 mmol/g. The best desorbing agent to remove the adsorbed ion from SH-MCM-48 was 0.3 M HCl solution with the desorption percentage of 58.6%.
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页数：9
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