4.6 Article

Adsorption Capacity of Silica SBA-15 and Titanosilicate ETS-10 toward Indium Ions

期刊

MATERIALS
卷 16, 期 8, 页码 -

出版社

MDPI
DOI: 10.3390/ma16083201

关键词

adsorption; indium; silica SBA-15; titanosilicate ETS-10; pollution; remediation

向作者/读者索取更多资源

This study investigated the recovery of indium using silica SBA-15 and titanosilicate ETS-10 under different conditions. The results showed that ETS-10 achieved maximum indium removal at pH 3.0, while SBA-15 performed best within the pH range of 5.0-6.0. The indium adsorption on SBA-15 followed the Elovich model, while its sorption on ETS-10 fitted the pseudo-first-order model. Langmuir and Freundlich adsorption isotherms were used to explain the equilibrium of the sorption process. Rating: 8/10
Indium is an extremely important element for industry that is distributed in the Earth's crust at very low concentrations. The recovery of indium by silica SBA-15 and titanosilicate ETS-10 was investigated at different pH levels, temperatures, times of contact and indium concentrations. A maximum removal of indium by ETS-10 was achieved at pH 3.0, while by SBA-15 it was within the pH range of 5.0-6.0. By studying kinetics, the applicability of the Elovich model for the description of indium adsorption on silica SBA-15 was shown, while its sorption on titanosilicate ETS-10 fitted well with the pseudo-first-order model. Langmuir and Freundlich adsorption isotherms were used to explain the equanimity of the sorption process. The Langmuir model showed its applicability for the explanation of the equilibrium data obtained for both sorbents, the maximum sorption capacity obtained using the model constituted 366 mg/g for titanosilicate ETS-10 at pH 3.0, temperature 22 degrees C and contact time 60 min, and 2036 mg/g for silica SBA-15 at pH 6.0, temperature 22 degrees C and contact time 60 min. Indium recovery was not dependent on the temperature and the sorption process was spontaneous in nature. The interactions between the indium sulfate structure and surfaces of adsorbents were investigated theoretically using the ORCA quantum chemistry program package. The spent SBA-15 and ETS-10 could be easily regenerated by using 0.01 M HCl and reused with up to 6 cycles of adsorption/desorption with a decrease in the removal efficiency between 4% and 10% for SBA-15 and 5% and 10% for ETS-10, respectively.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.6
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据