Synthesis of Calcium Silicate Hydrate from Coal Gangue for Cr(VI) and Cu(II) Removal from Aqueous Solution
Zhang, Qing1,2; Liu, Guijian2,3; Peng, Shuchuan1; Zhou, Chuncai1,2
通讯作者Peng, Shuchuan(pengshuchuan@hfut.edu.cn)
2021-10-01
发表期刊MOLECULES
卷号26期号:20页码:14
摘要Both the accumulation of coal gangue and potentially toxic elements in aqueous solution have caused biological damage to the surrounding ecosystem of the Huainan coal mining field. In this study, coal gangue was used to synthesize calcium silicate hydrate (C-S-H) to remove Cr(VI) and Cu(II)from aqueous solutions and aqueous solution. The optimum parameters for C-S-H synthesis were 700 & DEG;C for 1 h and a Ca/Si molar ratio of 1.0. Quantitative sorption analysis was done at variable temperature, C-S-H dosages, solution pH, initial concentrations of metals, and reaction time. The solution pH was precisely controlled by a pH meter. The adsorption temperature was controlled by a thermostatic gas bath oscillator. The error of solution temperature was controlled at & PLUSMN; 0.3, compared with the adsorption temperature. For Cr(VI) and Cu(II), the optimum initial concentration, temperature, and reaction time were 200 mg/L, 40 & DEG;C and 90 min, pH 2 and 0.1 g C-S-H for Cr(VI), pH 6 and 0.07 g C-S-H for Cu(II), respectively. The maximum adsorption capacities of Cr(VI) and Cu(II) were 68.03 and 70.42 mg & BULL;g(-1), respectively. Furthermore, the concentrations of Cu(II) and Cr(VI) in aqueous solution could meet the surface water quality standards in China. The adsorption mechanism of Cu(II) and Cr(VI) onto C-S-H were reduction, electrostatic interaction, chelation interaction, and surface complexation. It was found that C-S-H is an environmentally friendly adsorbent for effective removal of metals from aqueous solution through different mechanisms.

关键词removal Cr(VI) Cu(II) aqueous solution coal gangue
DOI10.3390/molecules26206192
关键词[WOS]TRACE-ELEMENTS ; CHROMIUM VI ; ADSORPTION ; MECHANISM ; IONS ; COMBUSTION ; METAKAOLIN ; KAOLINITE ; PHOSPHATE ; KINETICS
收录类别SCI ; SCI
语种英语
资助项目National Key Research and Development Program of China[2016YFC0201600] ; Key Research and Development Program of Anhui Province[201903a07020011] ; Key Research and Development Program of Anhui Province[202004b11020016] ; National Natural Science Foundation of China[41672144] ; National Natural Science Foundation of China[41702166] ; National Natural Science Foundation of China[41772035]
WOS研究方向Biochemistry & Molecular Biology ; Chemistry
项目资助者National Key Research and Development Program of China ; Key Research and Development Program of Anhui Province ; National Natural Science Foundation of China
WOS类目Biochemistry & Molecular Biology ; Chemistry, Multidisciplinary
WOS记录号WOS:000714576700001
出版者MDPI
引用统计
被引频次:4[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/17161
专题黄土与第四纪地质国家重点实验室(2010~)
通讯作者Peng, Shuchuan
作者单位1.Hefei Univ Technol, Sch Resource & Environm Engn, Hefei 230009, Peoples R China
2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710075, Peoples R China
3.Univ Sci & Technol China, Sch Earth & Space Sci, CAS Key Lab Crust Mantle Mat & Environm, Hefei 230026, Peoples R China
推荐引用方式
GB/T 7714
Zhang, Qing,Liu, Guijian,Peng, Shuchuan,et al. Synthesis of Calcium Silicate Hydrate from Coal Gangue for Cr(VI) and Cu(II) Removal from Aqueous Solution[J]. MOLECULES,2021,26(20):14.
APA Zhang, Qing,Liu, Guijian,Peng, Shuchuan,&Zhou, Chuncai.(2021).Synthesis of Calcium Silicate Hydrate from Coal Gangue for Cr(VI) and Cu(II) Removal from Aqueous Solution.MOLECULES,26(20),14.
MLA Zhang, Qing,et al."Synthesis of Calcium Silicate Hydrate from Coal Gangue for Cr(VI) and Cu(II) Removal from Aqueous Solution".MOLECULES 26.20(2021):14.
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