An improved implementable process for the synthesis of zeolite 4A from bauxite tailings and its Cr3+ removal capacity

Peng-cheng Lei, Xian-jiang Shen, Yang Li, Min Guo, Mei Zhang

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    Peng-cheng Lei, Xian-jiang Shen, Yang Li, Min Guo, and Mei Zhang, An improved implementable process for the synthesis of zeolite 4A from bauxite tailings and its Cr3+ removal capacity, Int. J. Miner. Metall. Mater., 23(2016), No. 7, pp.850-857. https://dx.doi.org/10.1007/s12613-016-1300-6
    Peng-cheng Lei, Xian-jiang Shen, Yang Li, Min Guo, and Mei Zhang, An improved implementable process for the synthesis of zeolite 4A from bauxite tailings and its Cr3+ removal capacity, Int. J. Miner. Metall. Mater., 23(2016), No. 7, pp.850-857. https://dx.doi.org/10.1007/s12613-016-1300-6
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    An improved implementable process for the synthesis of zeolite 4A from bauxite tailings and its Cr3+ removal capacity

    • School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China

    基金项目: 

    This work was financially supported by the National High Technology Research and Development Program of China (No. 2013AA032003) and the National Natural Science Foundation of China (Nos. 51372019, 51272025, and 51072022).

      通信作者:

      Mei Zhang E-mail: zhangmei@ustb.edu.cn

    中文摘要

    A simple and practical method for the synthesis of zeolite 4A from bauxite tailings is presented in this paper. Systematic investigations were carried out regarding the capacity of zeolite 4A to remove Cr(Ⅲ) from aqueous solutions with relatively low initial concentrations of Cr(Ⅲ) (5–100 mg·L-1). It is found that the new method is extremely cost-effective and can significantly contribute in decreasing environmental pollution caused by the dumping of bauxite tailings. The Cr(Ⅲ) removal capacity highly depends on the initial pH value and concentration of Cr(Ⅲ) in the solution. The maximum removal capacity of Cr(Ⅲ) was evaluated to be 85.1 mg·g-1 for zeolite 4A, measured at an initial pH value of 4 and an initial Cr(Ⅲ) concentration of 5 mg·L-1. This approach enables a higher removal capacity at lower concentrations of Cr(Ⅲ), which is a clear advantage over the chemical precipitation method. The removal mechanism of Cr(Ⅲ) by zeolite 4A was examined. The results suggest that both ion exchange and the surface adsorption-crystallization reaction are critical steps. These two steps collectively resulted in the high removal capacity of zeolite 4A to remove Cr(Ⅲ).

     

    An improved implementable process for the synthesis of zeolite 4A from bauxite tailings and its Cr3+ removal capacity

    Author Affilications

      • School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China

    • Funds: 

      This work was financially supported by the National High Technology Research and Development Program of China (No. 2013AA032003) and the National Natural Science Foundation of China (Nos. 51372019, 51272025, and 51072022).

    • Received: 16 December 2015; Revised: 21 January 2016; Accepted: 24 January 2016;
    A simple and practical method for the synthesis of zeolite 4A from bauxite tailings is presented in this paper. Systematic investigations were carried out regarding the capacity of zeolite 4A to remove Cr(Ⅲ) from aqueous solutions with relatively low initial concentrations of Cr(Ⅲ) (5–100 mg·L-1). It is found that the new method is extremely cost-effective and can significantly contribute in decreasing environmental pollution caused by the dumping of bauxite tailings. The Cr(Ⅲ) removal capacity highly depends on the initial pH value and concentration of Cr(Ⅲ) in the solution. The maximum removal capacity of Cr(Ⅲ) was evaluated to be 85.1 mg·g-1 for zeolite 4A, measured at an initial pH value of 4 and an initial Cr(Ⅲ) concentration of 5 mg·L-1. This approach enables a higher removal capacity at lower concentrations of Cr(Ⅲ), which is a clear advantage over the chemical precipitation method. The removal mechanism of Cr(Ⅲ) by zeolite 4A was examined. The results suggest that both ion exchange and the surface adsorption-crystallization reaction are critical steps. These two steps collectively resulted in the high removal capacity of zeolite 4A to remove Cr(Ⅲ).

     

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    Maria Bagani, Dimitrios Kotsanis, Michalis Vafeias, et al. Leaching Study of Guinean Bauxite Tailings in aqueous HCl Solution for the Extraction of Aluminum. Sustainability, 2023, 15(23): 16232. 必应学术
    Jennifer Jimenez-Paz, Juan José Lozada-Castro, Edward Lester, et al. Solutions to hazardous wastes issues in the leather industry: adsorption of Chromium iii and vi from leather industry wastewaters using activated carbons produced from leather industry solid wastes. Journal of Environmental Chemical Engineering, 2023, 11(3): 109715. 必应学术
    Yi Zhang, Muhammad Haris, Lei Zhang, et al. Amino-modified chitosan/gold tailings composite for selective and highly efficient removal of lead and cadmium from wastewater. Chemosphere, 2022, 308: 136086. 必应学术
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