Rapid and efficient removal of Sr2+ ions by the easy-to-operate and environmentally friendly KInSnS4@collagen fiber aerogel - Details

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It　is　still　a　challenge　to　capture　radioactive　90Sr2+　ions　conveniently,　quickly,　and　efficiently　from　complex　aqueous　solutions.　Herein,　a　composite　material,　KInSnS4@CF　aerogel　(CF　=　collagen　fiber),　was　prepared　by　loading　the　metal　sulfide　ion　exchanger　KInSnS4　on　collagen　fibers　through　electrostatic　self-assembly.　The　KInSnS4@CF　aerogel　is　well　shaped　and　maneuverable.　It　can　efficiently　capture　Sr2+　with　satisfactory　adsorption　capacity　(qSrmax　=　41.48　mg　g−1),　fast　kinetics　(adsorption　equilibrium　within　2　min),　broad　pH　activity　(pH　=　2-12),　and　facile　elution.　The　aerogel　shows　good　selectivity　for　the　capture　of　Sr2+　under　the　coexistence　of　Na+,　Cs+,　Ca2+,　and　Mg2+,　as　well　as　in　actual　water　samples.　In　addition,　it　can　serve　as　the　stationary　phase　being　used　in　the　ion　exchange　column　for　the　efficient　treatment　of　Sr2+　solutions　in　a　dynamic　manner.　The　efficient　Sr2+　removal　of　the　KInSnS4@CF　aerogel　mainly　originates　from　ion　exchange　between　Sr2+　and　K+　in　the　interlayer　spaces　of　KInSnS4,　while　the　CFs　mainly　serve　as　support　materials.　This　work　not　only　provides　a　new　easy-to-operate　and　environmentally　friendly　metal　sulfide　composite　aerogel,　but　also　paves　the　avenue　for　the　application　of　CFs　from　leather　industry　waste.　©　2025　The　Royal　Society　of　Chemistry.

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[ 1 ] [He J.-H.]State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fujian, Fuzhou, 350002, China
[ 2 ] [He J.-H.]College of Chemistry, Fuzhou University, Fujian, Fuzhou, 350116, China
[ 3 ] [He J.-H.]Fujian College, University of Chinese Academy of Sciences, Fuzhou, 350002, China
[ 4 ] [Tang J.-H.]State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fujian, Fuzhou, 350002, China
[ 5 ] [Zhang M.-D.]Fujian Key Laboratory on Conservation and Sustainable Utilization of Marine Biodiversity, College of Geography and Oceanography, Minjiang University, Fuzhou, 350108, China
[ 6 ] [Lv C.]State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fujian, Fuzhou, 350002, China
[ 7 ] [Yang L.]State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fujian, Fuzhou, 350002, China
[ 8 ] [Chen Z.-H.]State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fujian, Fuzhou, 350002, China
[ 9 ] [Liu Y.]State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fujian, Fuzhou, 350002, China
[ 10 ] [Sun H.-Y.]State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fujian, Fuzhou, 350002, China
[ 11 ] [Feng M.-L.]State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fujian, Fuzhou, 350002, China
[ 12 ] [Feng M.-L.]College of Chemistry, Fuzhou University, Fujian, Fuzhou, 350116, China
[ 13 ] [Feng M.-L.]Fujian College, University of Chinese Academy of Sciences, Fuzhou, 350002, China
[ 14 ] [Huang X.-Y.]State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fujian, Fuzhou, 350002, China
[ 15 ] [Huang X.-Y.]College of Chemistry, Fuzhou University, Fujian, Fuzhou, 350116, China
[ 16 ] [Huang X.-Y.]Fujian College, University of Chinese Academy of Sciences, Fuzhou, 350002, China

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Reaction Chemistry and Engineering

ISSN： 2058-9883

Year： 2025

3 . 4 0 0

JCR@2023

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