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Bioinspired Mesoporous Silica for Cd(II) Removal from Aqueous Solutions
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2022-06-03 , DOI: 10.1021/acs.iecr.2c00330
Cléophée Gourmand 1 , Caroline Bertagnolli 1 , Jérémy Brandel 1 , Véronique Hubscher-Bruder 1 , Anne Boos 1
Affiliation  

The wide industrial use of cadmium, one of the most hazardous toxic metals, leads inevitably to an increased contamination of effluents. In this study, Cd(II) removal by bioinspired thiol-functionalized mesoporous silica has been carried out. SBA-15 mesoporous silica with a high specific surface area (>900 m2 g–1) has been synthesized, and furthermore, 0.3 mmol g–1 glutathione has been successfully grafted (SBA-GSH). The obtained material was able to capture Cd(II). Optimum Cd(II) adsorption parameters as a function of the pH, contact time, and initial Cd(II) concentration have been studied. An S-shaped isotherm and further Fourier-transform infrared characterization suggest a multi-site adsorption involving thiol and carboxylic groups, with an adsorption capacity of 1.04 mmol g–1 that makes the SBA-GSH material a promising candidate for cadmium removal. Reusability studies have been performed in three cycles, and 90% of the adsorbed Cd(II) has been recovered using 0.01 M HNO3.

中文翻译:

用于从水溶液中去除 Cd(II) 的仿生介孔二氧化硅

镉是最危险的有毒金属之一,其广泛的工业用途不可避免地导致废水污染增加。在这项研究中,通过仿生硫醇官能化介孔二氧化硅去除 Cd(II) 已经进行。已合成具有高比表面积 (>900 m 2 g –1 ) 的 SBA-15 介孔二氧化硅,此外,0.3 mmol g –1谷胱甘肽已成功嫁接(SBA-GSH)。获得的材料能够捕获 Cd(II)。已经研究了作为 pH 值、接触时间和初始 Cd(II) 浓度函数的最佳 Cd(II) 吸附参数。S 形等温线和进一步的傅里叶变换红外表征表明,涉及硫醇和羧基的多位点吸附,吸附容量为 1.04 mmol g -1,这使得 SBA-GSH 材料成为去除镉的有希望的候选材料。重复使用性研究已在三个循环中进行,90% 的吸附 Cd(II) 已使用 0.01 M HNO 3回收。
更新日期:2022-06-03
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