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Study of Arsenic Adsorption Mechanism on Hydrous Ceric Oxide in Geothermal Water

Abstract

砷是一种以高毒性而闻名的类金属元素,水环境中的砷对人体健康危害严重。近年来随着地热水开发利用的不断扩大,来源于地热水系统的砷污染正日益引起国内外研究者的注意。大规模开发伴随的高砷地热弃水直接排放是砷污染引发的原因之一,因此研究适合于中高水温区域和多组分共存条件下对砷的选择性吸附是吸附材料能否满足地热水除砷的关键。 本文以水合氧化铈(HCO)为吸附剂,研究不同温度下其对As(Ⅲ)和As(Ⅴ)吸附动力学、等温吸附模式及多组分共存离子对吸附的影响,结合XRD、SEM-EDS、FTIR、XPS以及XAS光谱分析对吸附前后材料进行表征,探讨砷吸附反应机理。研究结果表明: (1)HCO对As(Ⅲ)和A...Arsenic is a ubiquitous metalloid element famous for its high toxic; it has great harm to human body in water environment. In recent years, with the increased development and utilization of geothermal water, arsenic pollution comes from the geothermal water system has drawn increasingly attention of researchers at home and abroad. The large-scale development of high arsenic geothermal water discha...学位:工学硕士院系专业:海洋与环境学院环境科学与工程系_环境工程学号:2262009115117

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