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题名: Utilization of annealed aluminum hydroxide waste with incorporated fluoride for adsorptive removal of heavy metals
作者: Liu, Ruiping; Ju, Jiawei; He, Ziliang; Hu, Chengzhi; Liu, Huijuan; Qu, Jiuhui
刊名: COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
出版日期: 2016-09-05
卷号: 504, 期号:0, 页码:95-104
关键词: Al(OH)(3) ; Fluoride ; Annealing ; Adsorption ; Alumina ; Heavy metals
DOI: 10.1016/j.colsurfa.2016.05.052
部门归属: 环境水质学国家重点实验室
英文摘要: The removal of fluoride by Al hydroxide [Al(OH)(3)] adsorption and aluminum (Al) coagulation produces spent wastes of Al(OH)(3)-F-ads and Al(OH)(3)-F-coag. This study prepared the annealed Al(OH)(3)-F-ads, Al(OH)(3)-F-coag, and pristine Al(OH)(3) at annealing temperature (AT) of 200 degrees C, 600 degrees C, and 900 degrees C, and compared their removal behaviors towards cadmium [Cd(II)], arsenite [As(III)], and arsenate [As(V)]. Annealing treatment decreased their BET surface area (S-BET) and isoelectric point (pH(iep)), and a more significant extent of decrease was observed at elevated AT. The incorporation of fluoride lowered their efficiency towards the removal of Cd(II), As(III), and As(V) as compared to Al(OH)(3). The elevated AT benefited Cd(II) adsorption whereas it inhibited the removal of As(III) and As(V) by any of the obtained aluminas, owing to the shift of pH(iep) to lower pH ranges at elevated AT. The adsorption of Cd(II) increased whereas that of As(III) and As(V) decreased with elevated pH, with electrostatic interactions playing a determining role. The release of fluoride from Al(OH)(3)-F-ads and Al(OH)(3)-F-coag did occur, and it could be controlled by annealing them at elevated AT. The annealed aluminas showed good affinity towards different heavy metals and may be reclaimed for the treatment of industrial wastewater. (C) 2016 Elsevier B.V. All rights reserved.
收录类别: SCI
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内容类型: 期刊论文
URI标识: http://ir.rcees.ac.cn/handle/311016/36088
Appears in Collections:环境水质学国家重点实验室_期刊论文

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