Wei J
; Tu C; Yuan GD; Bi DX; Xiao L; Theng BKG; Wang HL; Ok YS发表期刊Journal of Hazardous Materials
ISSN0304-3894
2019
卷号368页码:541-549
关键词Carbon-coated montmorilloniteChromium(VI)AdsorptionSTXMXANES
研究领域Engineering, Environmental; Environmental Sciences
DOI10.1016/j.jhazmat.2019.01.080
产权排序1
作者部门海岸带环境过程实验室
英文摘要A carbon-coated montmorillonite nanocomposite (CMt), obtained by hydrothermal carbonization of montmorillonite suspension in glucose, was used to remove Cr(VI) from aqueous solutions. The distribution and speciation of Cr immobilized by CMt were assessed by transmission electron microscopy with energy-dispersive Xray analysis, X-ray absorption near edge structure (XANES), and scanning transmission soft X-ray microscopy (STXM). The variation in the functional groups and molecular structures of CMt was also investigated. The capacity of CMt for adsorbing Cr(VI) was markedly superior to that of the parent montmorillonite, showing maximum uptake of 100 and 12.4 mg g(-1) at pH 2 and 8, respectively. The Cr K-edge XANES and STXM analyses indicated that Cr(VI) was reduced to Cr(III) under both acidic and alkaline conditions, while a Cr(OH)3 precipitate and Cr(III)-acetate complex were the predominant species present on the CMt surface. The Fourier transform infrared spectroscopy and C K-edge XANES further suggested that the phenolic groups in CMt could serve as electron donors, facilitating Cr(VI) reduction. The combined results indicate that electrostatic attraction, Cr(VI) reduction, complexation, and precipitation are involved in the removal of Cr(VI) by CMt.
文章类型Article
收录类别SCI
语种英语
关键词[WOS]HYDROTHERMAL CARBONIZATION PROCESS; HEXAVALENT CHROMIUM; ORGANIC-MOLECULES; HEAVY-METALS; CR(VI); ADSORPTION; ABSORPTION; REDUCTION; SOIL; IMMOBILIZATION
研究领域[WOS]Engineering, Environmental; Environmental Sciences
WOS记录号WOS:000461270900061
引用统计被引频次：42[WOS][WOS记录][WOS相关记录]
文献类型期刊论文
条目标识符http://ir.yic.ac.cnhttp://ir.yic.ac.cn/handle/133337/24146
专题中科院海岸带环境过程与生态修复重点实验室_海岸带环境过程实验室
中国科学院烟台海岸带研究所
通讯作者Yuan GD推荐引用方式
GB/T 7714Wei J,Tu C,Yuan GD,et al. Carbon-coated montmorillonite nanocomposite for the removal of chromium(VI) from aqueous solutions[J]. Journal of Hazardous Materials,2019,368:541-549.
APAWei J.,Tu C.,Yuan GD.,Bi DX.,Xiao L.,...&Ok YS.(2019).Carbon-coated montmorillonite nanocomposite for the removal of chromium(VI) from aqueous solutions.Journal of Hazardous Materials,368,541-549.
MLAWei J,et al."Carbon-coated montmorillonite nanocomposite for the removal of chromium(VI) from aqueous solutions".Journal of Hazardous Materials 368(2019):541-549.
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