Insights into the removal of Cr(VI) from aqueous solution using plant-mediated biosynthesis of iron nanoparticles - 文章详情页

作者：

Hao, Runqin (Hao, Runqin.) | Li, Dong (Li, Dong.) (学者：李冬) | Zhang, Jie (Zhang, Jie.) (学者：张杰)

收录：

EI Scopus SCIE

摘要：

While　many　studies　have　successfully　used　plant　extracts　to　biosynthesize　iron　nanoparticles　as　low-cost,　sustainable　and　high-performance　materials　for　removing　Cr(VI)　from　aqueous　solution,　the　exact　removal　mechanism　involved　remains　poorly　understood.　In　this　research,　a　green　tea　extract　was　employed　both　as　a　reducing　and　coating　agent　to　prepare　iron　nanoparticles　(GT-nFe)　via　an　environmentally　friendly　green　synthesis　method,　where　the　material　so　produced　was　then　used　to　remove　Cr(VI)　from　aqueous　solution.　The　efficiency　in　removing　Cr(VI)　using　GT-nFe　reached　90.2　%　at　an　initial　Cr(VI)　concentration　of　60mgL−1　and　pH　of　5.0.　Kinetic　and　thermodynamic　analysis　indicated　that　Langmuir　isotherm　and　pseudo-second　order　models　best　described　the　adsorption　of　Cr(VI)　by　GT-nFe.　Thermodynamic　studies　revealed　that　adsorption　was　spontaneous　(ΔG00＞0).　Application　of　advanced　characterization　techniques,　including　SEM-EDS,　TEM　and　XPS,　indicated　a　detailed　Cr(VI)　removal　mechanism　involving　both　adsorption　and　redox　reactions.　©　2021　Elsevier　B.V.

关键词：

Green Synthesis Iron Chromium compounds Adsorption Redox reactions Biochemistry Thermoanalysis Tea Isotherms Chromium metallography Chemicals removal (water treatment) Plant extracts Iron compounds Nanoparticles Thermodynamic properties Extraction Iron research

作者机构：

[ 1 ] [Hao, Runqin]Key Laboratory of Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing; 100124, China
[ 2 ] [Hao, Runqin]Environmental Protection Research Institute of Light Industry, Beijing; 100089, China
[ 3 ] [Li, Dong]Key Laboratory of Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing; 100124, China
[ 4 ] [Zhang, Jie]Key Laboratory of Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing; 100124, China
[ 5 ] [Zhang, Jie]State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin; 150090, China

通讯作者信息：

李冬
[li, dong]key laboratory of water quality science and water environment recovery engineering, beijing university of technology, beijing; 100124, china

电子邮件地址：

lidong2006@bjut.edu.cn

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