Preparation of hydrated calcium silicate gel and its adsorption properties for cu (ii) - Details

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Abstract：

Calcium　silicate　hydrate　gel　(CSH)　was　synthesized　by　calcium　acetate　and　sodium　silicate.　The　structure　and　morphology　of　CSH　were　characterized　by　X-ray　diffraction　analysis,　Fourier　transform　infrared　spectroscopy　and　Scanning　electron　microscopy.　The　adsorption　performance　of　CSH　was　measured　by　static　adsorption　method.　The　results　show　that　CSH　has　porous　structure　and　large　specific　surface　area,　and　the　optimum　reaction　conditions　is　the　reaction　temperature　of　25　and　calcium-silicon　ratio　of　1.2.　It　has　the　maximum　adsorption　capacity　of　more　than　150　mg/g　and　the　removal　rate　of　more　than　86%　with　Cu2+.　And　it　shows　the　excellent　adsorption　performance,　even　when　the　concentration　of　Cu2+　is　less　than　200mg/L,　the　removal　rate　is　above　90%.　The　research　may　provide　a　low-cost　and　high-efficiency　adsorbent.　©　2020　Trans　Tech　Publications　Ltd,　Switzerland.

Keyword：

Adsorption Fourier transform infrared spectroscopy Calcium silicate Sodium compounds Morphology X ray powder diffraction Hydration Scanning electron microscopy Porous silicon Silicate minerals

Author Community：

[ 1 ] [Liu, Shijie]College of Material Science and Engineering, Beijing University of Technology, Beijing; 100124, China
[ 2 ] [Cui, Suping]College of Material Science and Engineering, Beijing University of Technology, Beijing; 100124, China
[ 3 ] [Guo, Hongxia]College of Material Science and Engineering, Beijing University of Technology, Beijing; 100124, China
[ 4 ] [Wang, Yali]College of Material Science and Engineering, Beijing University of Technology, Beijing; 100124, China
[ 5 ] [Li, Nan]College of Material Science and Engineering, Beijing University of Technology, Beijing; 100124, China
[ 6 ] [Gan, Yanling]College of Material Science and Engineering, Beijing University of Technology, Beijing; 100124, China
[ 7 ] [Zheng, Yan]College of Material Science and Engineering, Beijing University of Technology, Beijing; 100124, China