IEECAS OpenIR  > 黄土与第四纪地质国家重点实验室(2010~)
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
Corresponding AuthorPeng, Shuchuan(pengshuchuan@hfut.edu.cn)
2021-10-01
Source PublicationMOLECULES
Volume26Issue:20Pages:14
AbstractBoth 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.

Keywordremoval Cr(VI) Cu(II) aqueous solution coal gangue
DOI10.3390/molecules26206192
WOS KeywordTRACE-ELEMENTS ; CHROMIUM VI ; ADSORPTION ; MECHANISM ; IONS ; COMBUSTION ; METAKAOLIN ; KAOLINITE ; PHOSPHATE ; KINETICS
Indexed BySCI ; SCI
Language英语
Funding ProjectNational 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 Research AreaBiochemistry & Molecular Biology ; Chemistry
Funding OrganizationNational Key Research and Development Program of China ; Key Research and Development Program of Anhui Province ; National Natural Science Foundation of China
WOS SubjectBiochemistry & Molecular Biology ; Chemistry, Multidisciplinary
WOS IDWOS:000714576700001
PublisherMDPI
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/17161
Collection黄土与第四纪地质国家重点实验室(2010~)
Corresponding AuthorPeng, Shuchuan
Affiliation1.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
Recommended Citation
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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