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Removal of Cd(II) from Water by HPEI Modified Humin

Author

Listed:
  • Sanmei Li

    (State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 211816, China)

  • Mingda Wu

    (State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 211816, China)

  • Linghong Lu

    (State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 211816, China)

  • Jiabao Zhu

    (State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 211816, China)

Abstract

Humin is the waste residue from the process of preparing humic acid, which accounts for a large proportion of the raw material (weathered coal humic acid). Its Cd(II) adsorption performance is far inferior to that of humic acid. How to regenerate humin is of great significance to the low-cost treatment of Cd(II) pollution in wastewater. In this study, humin was modified by hyperbranched polyethyleneimine to enhance the adsorption capacity for Cd(II). Fourier transform infrared spectroscopy and the X-ray photoelectron spectrometer showed that hyperbranched polyethyleneimine was grafted to the surface of humin. Flame atomic absorption spectroscopy showed that the saturated Cd(II) adsorption capacity of the modified humin was increased to 11.975 mg/g, which is about 5 times than that of humin and is also higher than that of humic acid. The adsorption kinetics, adsorption isotherm, and thermodynamic properties of humic acid, humin, and modified humin were also studied. This study may provide a foundation for research utilizing natural resources to reduce heavy metal pollution in the environment.

Suggested Citation

  • Sanmei Li & Mingda Wu & Linghong Lu & Jiabao Zhu, 2020. "Removal of Cd(II) from Water by HPEI Modified Humin," Sustainability, MDPI, vol. 12(19), pages 1-11, September.
    • Handle: RePEc:gam:jsusta:v:12:y:2020:i:19:p:7931-:d:419101
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    References listed on IDEAS

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    1. Qingfa Su & Xianfang Yi & Jifa Miao & Yanting Chen & Jinsheng Chen & Jinxiu Wang, 2020. "A Comparative Study in Vanadium and Tungsten Leaching from Various Sources of SCR Catalysts with Local Difference," Sustainability, MDPI, vol. 12(4), pages 1-12, February.
    2. Shanshan Li & Meng Wang & Zhongqiu Zhao & Changbao Ma & Shibao Chen, 2018. "Adsorption and Desorption of Cd by Soil Amendment: Mechanisms and Environmental Implications in Field-Soil Remediation," Sustainability, MDPI, vol. 10(7), pages 1-14, July.
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    Cited by:

    1. Changsong Zhang & Xueke Zang & Zhenxue Dai & Xiaoying Zhang & Ziqi Ma, 2021. "Remediation Techniques for Cadmium-Contaminated Dredged River Sediments after Land Disposal," Sustainability, MDPI, vol. 13(11), pages 1-13, May.

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