Chemical Engineering, Federal University of Pampa, 1650 Maria Anunciação Gomes Godoy Avenue, Bagé, Rio Grande do Sul, 96413-172, Brazil.
Chemical Engineering, Federal University of Rio Grande do Sul, 2777 Ramiro Barcelos Street, Porto Alegre, Rio Grande do Sul, 90035-007, Brazil.
Environ Sci Pollut Res Int. 2019 Oct;26(28):28603-28613. doi: 10.1007/s11356-018-3852-7. Epub 2018 Dec 13.
The aim of this work was to characterize the coal fly ash from gasification process (G-CFA) and to analyze its potential as hexavalent chromium Cr (VI) adsorbent. The G-CFA was characterized in terms of physical, chemical, mineralogical, and morphological analyses. Bach adsorption studies were carried out in order to evaluate the influence of pH on the adsorption capacity and removal efficiency of Cr (VI). The G-CFA characterization demonstrated that the material possessed potential to be applied as an effective low-cost adsorbent, once it presents 18.82 m g, 0.036 cm g, and 7.56 nm of surface area, pore volume, and average pore diameter, respectively. The results also showed well-defined mineralogical phases and high content of siliceous material. The adsorption experiments demonstrated that the material has potential to be used as a chromium adsorbent with high removal efficiencies.
本工作旨在对气化过程中的煤灰（G-CFA）进行表征，并分析其作为六价铬 Cr(VI)吸附剂的潜力。通过物理、化学、矿物学和形态分析对 G-CFA 进行了表征。进行了各项吸附研究，以评估 pH 值对 Cr(VI)吸附容量和去除效率的影响。G-CFA 的表征表明，该材料具有作为有效且低成本吸附剂的应用潜力，因为其比表面积、孔体积和平均孔径分别为 18.82m²/g、0.036cm³/g 和 7.56nm。结果还表明，该材料具有明确的矿物相和高含量的硅质材料。吸附实验表明，该材料具有作为高去除效率铬吸附剂的应用潜力。
