{"title":"Adsorption-Coagulation Mechanism of Composites in Treating Acid Mine Drainage","authors":"Liping Xiao, Zhe Liu, Xuefei Luan, Jichi Bai","doi":"10.15273/GREE.2017.02.030","DOIUrl":null,"url":null,"abstract":"In order to study the removal efficiency of Cu 2+ from acid mine drainage by prepared bentonite - steel slag composite particle s, adsorption experiment was carried out. The composite particles were characterized by X-ray Diffraction analysis technique (XRD), Scanning Electron Microscopy (SEM) and Fourier Transform Infrared spectrometer (FTIR). The results show that: the composite particles can release alkali to neutralize the acid of acid mine drainage ; t he adsorption and chemical precipitation of Cu 2+ occur red in the whole reaction process ; t he removal amount of composite particles on Cu 2+ was 9.88 mg/g when the reaction reached equilibrium ; the FTIR spectra reveal ed the existence of surface complexation ; the SEM micrographs suggest ed that the composite particles would continue to adsorb and coagulate Cu 2+ after the composite particles surface adsorbing Cu 2+ and forming precipitate, namely, there was synergistic reaction of adsorption and coagulation ; the XRD patterns further showed the existence of cation exchange and revealed that the states of Cu 2+ in the surface of the composite particles was Cu -Si-O mineral phase and CuO(Cu(OH) 2 ) polymerization precipitation. The bentonite-steel slag composite particles which can play a role of adsorption-coagulation synergism are excellent multifunctional g reen environmental mineral materials to treat acid mine drainage containing heavy metal ions.","PeriodicalId":21067,"journal":{"name":"Resources Environment & Engineering","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Resources Environment & Engineering","FirstCategoryId":"1087","ListUrlMain":"https://doi.org/10.15273/GREE.2017.02.030","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
In order to study the removal efficiency of Cu 2+ from acid mine drainage by prepared bentonite - steel slag composite particle s, adsorption experiment was carried out. The composite particles were characterized by X-ray Diffraction analysis technique (XRD), Scanning Electron Microscopy (SEM) and Fourier Transform Infrared spectrometer (FTIR). The results show that: the composite particles can release alkali to neutralize the acid of acid mine drainage ; t he adsorption and chemical precipitation of Cu 2+ occur red in the whole reaction process ; t he removal amount of composite particles on Cu 2+ was 9.88 mg/g when the reaction reached equilibrium ; the FTIR spectra reveal ed the existence of surface complexation ; the SEM micrographs suggest ed that the composite particles would continue to adsorb and coagulate Cu 2+ after the composite particles surface adsorbing Cu 2+ and forming precipitate, namely, there was synergistic reaction of adsorption and coagulation ; the XRD patterns further showed the existence of cation exchange and revealed that the states of Cu 2+ in the surface of the composite particles was Cu -Si-O mineral phase and CuO(Cu(OH) 2 ) polymerization precipitation. The bentonite-steel slag composite particles which can play a role of adsorption-coagulation synergism are excellent multifunctional g reen environmental mineral materials to treat acid mine drainage containing heavy metal ions.