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Comparative Study on the Adsorption Characteristics of Heavy Metal Ions by Activated Carbon and Selected Natural Adsorbents

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  • Jiashi Li

    (College of Civil Engineering, Taiyuan University of Technology, Taiyuan 030024, China)

  • Xiaoqiang Dong

    (College of Civil Engineering, Taiyuan University of Technology, Taiyuan 030024, China)

  • Xiaofeng Liu

    (College of Civil Engineering, Taiyuan University of Technology, Taiyuan 030024, China)

  • Xin Xu

    (College of Construction Engineering, Jilin University, Jilin 130021, China)

  • Wei Duan

    (College of Civil Engineering, Taiyuan University of Technology, Taiyuan 030024, China)

  • Junboum Park

    (Department of Civil and Environmental Engineering, Seoul National University, Seoul 08826, Republic of Korea)

  • Lei Gao

    (Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210024, China)

  • Yisi Lu

    (College of Civil Engineering, Taiyuan University of Technology, Taiyuan 030024, China)

Abstract

In this study, adsorption of the heavy metal ions (Pb(II), Cu(II) and Cd(II)) from water by peanut shells (PS), sawdust (S) and commercial activated carbon (AC) were comparatively studied. Thus, the relationship between different adsorption parameters and different heavy metal ion removal rates was investigated. The adsorption capacity of the three adsorbents for heavy metal ions increased with an increase in temperature, pH value, contact time, adsorbent dosage, and heavy metal ion concentration, however, it decreased with an increase of adsorbent particle size. All the adsorption processes are better described by Langmuir isotherm or Freundlich isotherm. Thus, the results show good agreement with pseudo-second-order kinetics and the adsorption processes are spontaneous heat absorption processes. Herein, all adsorbents have higher affinity for Pb(II) ions, and hence possess higher removal rates. In addition, heavy metal ions were desorbed significantly at acidic conditions in the desorption experiments. The results demonstrate that PS can be used as a green adsorbent instead of AC for the adsorption of heavy metal ions from the water.

Suggested Citation

  • Jiashi Li & Xiaoqiang Dong & Xiaofeng Liu & Xin Xu & Wei Duan & Junboum Park & Lei Gao & Yisi Lu, 2022. "Comparative Study on the Adsorption Characteristics of Heavy Metal Ions by Activated Carbon and Selected Natural Adsorbents," Sustainability, MDPI, vol. 14(23), pages 1-17, November.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:23:p:15579-:d:981732
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    References listed on IDEAS

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    1. Shafaqat Ali & Zohaib Abbas & Muhammad Rizwan & Ihsan Elahi Zaheer & İlkay Yavaş & Aydın Ünay & Mohamed M. Abdel-DAIM & May Bin-Jumah & Mirza Hasanuzzaman & Dimitris Kalderis, 2020. "Application of Floating Aquatic Plants in Phytoremediation of Heavy Metals Polluted Water: A Review," Sustainability, MDPI, vol. 12(5), pages 1-33, March.
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    Cited by:

    1. Yan Yu & Jiangtao He & Jingyang Sun & Zixuan Pei & Qidong Wu & Rui Yu, 2023. "Capacity and Mechanisms of Pb(II) and Cd(II) Sorption on Five Plant-Based Biochars," Sustainability, MDPI, vol. 15(9), pages 1-18, May.

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