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Application of Carboxymethyl Cellulose (CMC)-Coated Nanoscale Zero-Valent Iron in Chromium-Containing Soil Remediation

Author

Listed:
  • Bo Zhang

    (College of Materials and Advanced Manufacturing, Hunan University of Technology, Zhuzhou 421000, China)

  • Jiani Zhan

    (College of Materials and Advanced Manufacturing, Hunan University of Technology, Zhuzhou 421000, China)

  • Jiaqi Fan

    (College of Materials and Advanced Manufacturing, Hunan University of Technology, Zhuzhou 421000, China)

  • Bohong Zhu

    (College of Materials and Advanced Manufacturing, Hunan University of Technology, Zhuzhou 421000, China)

  • Weili Shen

    (College of Materials and Advanced Manufacturing, Hunan University of Technology, Zhuzhou 421000, China)

  • Shiwei Zhang

    (College of Materials and Advanced Manufacturing, Hunan University of Technology, Zhuzhou 421000, China)

  • Weiting Li

    (College of Materials and Advanced Manufacturing, Hunan University of Technology, Zhuzhou 421000, China)

  • Zhaohui Li

    (Linwu Xiangxin Kaishun Water Service Co., Chenzhou 424300, China)

  • Fanjun Zeng

    (Linwu Xiangxin Kaishun Water Service Co., Chenzhou 424300, China)

Abstract

Nanofine zero−valent iron (nZVI) is a new, eco−friendly material with strong reducing and adsorbent properties that can be used to clean up heavy metal−affected soils. Herein, nZVI encapsulated with carboxymethyl cellulose (CMC−nZVI) is synthesized via an aqueous−phase reduction technique and subsequently deployed to evaluate its effectiveness in Cr(VI) soil remediation. The characterization analysis used SEM−EDS, XRD, XPS, and LSV to determine the relevant properties of the material. The results show that at an initial Cr(VI) concentration of 169.5 mg·kg −1 , 93.2% of Cr(VI) was removed from the soil after 10 h of treatment with CMC−nZVI at pH 3.3. The kinetic analysis showed that CMC−nZVI had the maximum equilibrium adsorption capacity for removing Cr(VI) from soil at 105.3 mg·g −1 . This followed a pseudo−second−order kinetic model. The study shows that CMC−nZVI converts Cr(VI) to Cr(III), which forms complexes with Fe(III) ions in the presence of hydroxide ions (OH − ) to form a highly stable compound that eventually adsorbs into the nanomaterial’s surface for efficient removal.

Suggested Citation

  • Bo Zhang & Jiani Zhan & Jiaqi Fan & Bohong Zhu & Weili Shen & Shiwei Zhang & Weiting Li & Zhaohui Li & Fanjun Zeng, 2024. "Application of Carboxymethyl Cellulose (CMC)-Coated Nanoscale Zero-Valent Iron in Chromium-Containing Soil Remediation," Clean Technol., MDPI, vol. 6(4), pages 1-15, December.
    • Handle: RePEc:gam:jcltec:v:6:y:2024:i:4:p:78-1624:d:1541710
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    References listed on IDEAS

    as
    1. Fayuan Wang & Weiwei Yang & Fangyuan Zheng & Yuhuan Sun, 2018. "Removal of Cr (VI) from Simulated and Leachate Wastewaters by Bentonite-Supported Zero-Valent Iron Nanoparticles," IJERPH, MDPI, vol. 15(10), pages 1-14, October.
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