MODIFIED AMORPHOUS SiO2 FROM Zr-CONTAINING SILICA RESIDUE: A PROMISING WAY OF RECYCLING USEFUL MATERIALS AS WELL AS REMOVING Cr(VI) FROM WATER

Yu Liang, Wanting Chen, Han Zhang, Jimo Wang, Hao Ding and Xipeng Yu
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Yu Liang: School of Materials Science and Technology, Shenyang University of Chemical Technology, Shenyang 110142, Liaoning Province, P. R. China†Beijing Key Laboratory of Materials, Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences (Beijing), Beijing 100083, P. R. China§Liaoning Hongyanhe Nuclear Power Co., LTD, Dalian, 116319, Liaoning Province, China
Wanting Chen: #x2021;School of Materials Science and Engineering, Anhui Polytechnic University, Anhui Province, China
Han Zhang: #x2020;Beijing Key Laboratory of Materials, Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences (Beijing), Beijing 100083, P. R. China
Jimo Wang: #x2020;Beijing Key Laboratory of Materials, Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences (Beijing), Beijing 100083, P. R. China
Hao Ding: #x2020;Beijing Key Laboratory of Materials, Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences (Beijing), Beijing 100083, P. R. China
Xipeng Yu: #xA7;Liaoning Hongyanhe Nuclear Power Co., LTD, Dalian, 116319, Liaoning Province, China

Surface Review and Letters (SRL), 2021, vol. 28, issue 04, 1-11

Abstract: The amorphous SiO2, which is purified from Zr-containing silica residue, was modified by CTAB before the adsorption of Cr(VI). The impact of different variables, such as solution pH value, adsorption time, adsorption temperature, and adsorbent dosage were investigated on the Cr(VI) removal from solution. The results show that the optimal pH value for Cr(VI) adsorption is 3. And 60 min is needed for the adsorption with 10 g/L of modified amorphous SiO2 at 45∘C. The acquired adsorption isotherm and the adsorption process can be interpreted by Langmuir model and pseudo-second-order kinetic model, respectively. This paper provides an effective option for waste water treatment as well as a way of recycling useful materials from the discarded Zr-containing silica residue.

Keywords: Zr-containing silica residue; amorphous SiO2; modification; hexavalent chromium; adsorption (search for similar items in EconPapers)
Date: 2021
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DOI: 10.1142/S0218625X21500220

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