• Journal of Inorganic Materials
  • Vol. 35, Issue 11, 1239 (2020)
Chunhui ZHU1, Rong XU1、*, Xiuxiu REN1, Shixiang ZUO1, Genghao GONG2, and Jing ZHONG1、*
Author Affiliations
  • 1Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China
  • 2State Key Laboratory of Separation Membranes and Membrane Processes, School of Material Science and Engineering, Tiangong University, Tianjin 300387, China
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    DOI: 10.15541/jim20200007 Cite this Article
    Chunhui ZHU, Rong XU, Xiuxiu REN, Shixiang ZUO, Genghao GONG, Jing ZHONG. Fabrication of ZIF-8-NH2/Organosilica Hybrid Membranes for Pervaporation Desalination[J]. Journal of Inorganic Materials, 2020, 35(11): 1239 Copy Citation Text show less

    Abstract

    Industrial activities such as oil and gas drilling, power plant desulfurization and seawater desalination produce large amounts of high-salinity waste water. The effective treatment of the high-salinity waste water is the key to achieve zero liquid discharge. In the present study, ZIF-8-NH2/organosilica hybrid membranes were fabricated via the incorporation of ZIF-8-NH2 nanoparticles into BTESE-derived organosilica networks, using porous α-Al2O3 membranes as the supports. The as-prepared ZIF-8-NH2/BTESE hybrid membranes were applied to the desalination of high-salinity waste water by pervaporation. The effects of ZIF-8-NH2 content, feed temperature and feed concentration on desalination performances were systematically investigated. Compared with BTESE and ZIF-8/BTESE membranes, the amine-functionalized ZIF-8-NH2/BTESE hybrid membranes showed a simultaneous improvement in water permeance and salt rejection. In addition, the ZIF-8-NH2/BTESE hybrid membrane exhibited a high structural stability during the continuous pervaporation test up to 50 h, always delivering very high NaCl rejections of >99.95% and water permeances of >6.3×10 -11 m 3/(m 2×s×Pa). Moreover, the NaCl rejection of the membrane was almost constant regardless of feed temperature and feed concentration, showing great promise as a highly efficient membrane for the application in the desalination of high-salinity water.
    ${{J}_{\text{i}}}=\frac{{{P}_{\text{i}}}}{\ell }\cdot ({{p}_{\text{io}}}-{{p}_{\text{il}}})$

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    ${{P}_{\text{i}}}={{D}_{\text{i}}}\cdot {{K}_{\text{i}}}={{J}_{\text{i}}}\cdot \frac{\ell }{({{p}_{\text{io}}}-{{p}_{\text{il}}})}$

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    $\frac{{{P}_{\text{i}}}}{\ell }=\frac{{{D}_{\text{i}}}\cdot {{K}_{\text{i}}}}{\ell }=\frac{{{J}_{\text{i}}}}{{{p}_{\text{io}}}-{{p}_{\text{il}}}}$

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    ${{P}_{\text{w}}}=\frac{{{J}_{\text{v}}}}{{{p}_{\text{sat}}}}$

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    ${{J}_{\text{v}}}=\frac{V}{S\cdot \Delta t}$

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    ${{p}_{\text{sat}}}=\exp \left( A-\frac{B}{C+T} \right)$

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    ${{R}_{\text{obs}}}=\left( 1-\frac{{{C}_{\text{p}}}}{{{C}_{\text{f}}}} \right)\times 100%$

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    Chunhui ZHU, Rong XU, Xiuxiu REN, Shixiang ZUO, Genghao GONG, Jing ZHONG. Fabrication of ZIF-8-NH2/Organosilica Hybrid Membranes for Pervaporation Desalination[J]. Journal of Inorganic Materials, 2020, 35(11): 1239
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