摘要
借助扫描电镜(SEM)、X射线衍射(XRD)等手段,对水热合成的硫化亚铁(FeS)微粒进行特性表征,探究了水/乙二胺体积比、反应时间、反应温度、S/Fe物质的量比等因素对FeS微粒微观形貌的影响;通过批实验观测了具有不同形貌的FeS微粒对水溶液中Cr(Ⅵ)的去除性能.结果表明,在S/Fe物质的量比=1—4时,随着S/Fe物质的量比的增大,FeS形貌由片状逐渐转变为棒状;水/乙二胺体积比、反应温度和反应时间对FeS的形貌的影响不显著,均呈片状.FeS微粒可有效去除水溶液中的Cr(Ⅵ),当溶液pH=5.5时,0.5 g·L^(-1)的片状和棒状FeS对初始浓度为170 mg·L^(-1)的水溶液中Cr(Ⅵ)的去除率分别为79.4%和99.9%.
Ferrous sulfide(FeS)particles were prepared via a hydrothermal synthesis method,and then characterized by scanning electron microscopy and X-ray diffraction.The effects of water-toethylenediamine volume ratio,reaction time,reaction temperature and S:Fe molar ratio on the micromorphology of FeS particles were investigated.The removal of aqueous Cr(Ⅵ)using FeS particles with various morphologies was determined through batch tests.The results showed that the morphology of FeS particles gradually changed from flake-shaped to rod-shaped,as the S:Fe molar ratio increased from 1 to 4.The water-to-ethylenediamine volume ratio,reaction temperature,and reaction time had insignificant effects on the morphology of FeS particles,which remained flakeshaped.The removal efficiencies of aqueous Cr(Ⅵ)using 0.5 g·L^(-1)flake-shaped and rod-shaped FeS at a pH of 5.5 and initial Cr(Ⅵ)concentration of 170 mg·L^(-1)were 79.4%and 99.9%,respectively.
作者
何丹
刘元元
肖文燕
王涛
张桐
HE Dan;LIU Yuanyuan;XIAO Wenyan;WANG Tao;ZHANG Tong(Key Laboratory of the Three Gorges Reservoir Region’s Eco-Environment of Ministry of Education,Chongqing,400044,China;College of Environment and Ecology,Chongqing,400044,China;Chongqing Water Resources and Electric Engineering College,Chongqing,402160,China)
出处
《环境化学》
CAS
CSCD
北大核心
2023年第5期1690-1696,共7页
Environmental Chemistry
基金
国家自然科学基金(51778084)资助.
关键词
水热合成
FeS微粒
Cr(Ⅵ)
影响因素
hydrothermal synthesis
FeS particles
hexavalent chromium
influencing factors
