Preparation of amino-functionalized fly ash based tobermorite for enhanced removal of Cr(VI)

被引：0
作者：
Zehua Wang
Linhao Xu
Ningning Su
Shuhan Zhu
Daishe Wu
机构：
[1] Nanchang University,School of Resources & Environment, Key Laboratory of Poyang Lake Environmental and Resource Utilization, Ministry of Education
[2] Pingxiang University,School of Materials and Chemical Engineering
来源：
Environmental Science and Pollution Research | 2023年 / 30卷
关键词：
Cr(VI); Adsorption; Amino-functionalization; Fly ash; Tobermorite;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Amino-functionalized fly ash based tobermorite (NH2-FAT) was prepared via a two-step process including a hydrothermal preparation of fly ash based tobermorite (FAT) from fly ash (FA) and the impregnation of 3-aminopropyltriethoxysilane (APTES). The characteristics of FA, FAT, and NH2-FAT were systematically measured. The removal capacity of Cr(VI) by FAT and NH2-FAT were comparatively studied. The results indicated that the NH2-FAT presented excellent removal efficiency towards Cr(VI) in the condition of pH of 2. The adsorption capacity of Cr(VI) by NH2-FAT in this study was up to 498.39 mg/g resulted from Langmuir model, which was more superior to that of FAT, other reported FA based adsorbents and most amino-functionalized adsorbents. Furthermore, the removal mechanisms of Cr(VI) by NH2-FAT were ascribed to both electrostatic attraction and reduction to Cr(III) by amino groups. Overall, this work indicates the NH2-FAT is a promising adsorbent for treating wastewater containing Cr(VI), and provides a new utilization method of FA.
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页码：54547 / 54555
页数：8
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