title: Adsorption of hexavalent chromium onto organic bentonite modified by the use of iron(III) chloride.
abstract: The adsorption of hexavalent chromium (Cr(VI)) was improved by using organic bentonite (OB) modified with iron(III) chloride. The adsorption mechanisms and characteristics of OB and organic bentonite modified by FeCl3 (FMOB) were studied by using X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, and energy dispersive X-ray spectroscopy (EDS). It was found that hydroxyl-iron replaced some of the calcium and magnesium contained in the FMOB, but no significant change in its structure was shown even though the adsorption experiments proved that FMOB had a better Cr(VI) adsorption ability compared to OB. The coated material was prepared by mixing FMOB and 4A molecular sieves in a coated pot for the adsorption experiments in the test column. The relevant results showed that the adsorption of the coated material retained its high adsorption ability and maintained that ability after desorption and regeneration, which implied a potential for further application.
authors.affiliation: Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Centre for Microbiology, College of Life Sciences, Nanjing Normal University, Nanjing 210023, China E-mail: bin2368@vip.163.com; College of Agronomy and Resources and Environment, Tianjin Engineering Research Center of Agricultural and Environment Remediation, Tianjin Agricultural University, Tianjin 300384, China.
authors.forename: Jianchao
authors.initials: J
authors.lastname: Hao
authors.affiliation: Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Centre for Microbiology, College of Life Sciences, Nanjing Normal University, Nanjing 210023, China E-mail: bin2368@vip.163.com.
authors.forename: Leilei
authors.initials: L
authors.lastname: Xiao
authors.affiliation: College of Agronomy and Resources and Environment, Tianjin Engineering Research Center of Agricultural and Environment Remediation, Tianjin Agricultural University, Tianjin 300384, China.
authors.forename: Huifen
authors.initials: H
authors.lastname: Liu
authors.affiliation: College of Agronomy and Resources and Environment, Tianjin Engineering Research Center of Agricultural and Environment Remediation, Tianjin Agricultural University, Tianjin 300384, China.
authors.forename: Lijun
authors.initials: L
authors.lastname: Shi
authors.affiliation: College of Agronomy and Resources and Environment, Tianjin Engineering Research Center of Agricultural and Environment Remediation, Tianjin Agricultural University, Tianjin 300384, China.
authors.forename: Xiaoyan
authors.initials: X
authors.lastname: Xu
authors.affiliation: Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Centre for Microbiology, College of Life Sciences, Nanjing Normal University, Nanjing 210023, China E-mail: bin2368@vip.163.com.
authors.forename: Bin
authors.initials: B
authors.lastname: Lian
authors.affiliation: State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Science, Guiyang 550002, China.
authors.forename: Congqiang
authors.initials: C
authors.lastname: Liu
mesh_terms: D000327:Adsorption; D001546:Bentonite / Q000737:chemistry*; D002712:Chlorides / Q000737:chemistry*; D002857:Chromium / Q000737:chemistry*; D005290:Ferric Compounds / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D008855:Microscopy, Electron, Scanning; D013052:Spectrometry, X-Ray Emission; D017550:Spectroscopy, Fourier Transform Infrared; D014865:Waste Disposal, Fluid / Q000379:methods; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D002712:Chlorides; D005290:Ferric Compounds; D014874:Water Pollutants, Chemical; D002857:Chromium; D001546:Bentonite; C074702:chromium hexavalent ion; C024555:ferric chloride