• The Production of Metal-biochar through Co-pyrolysis of Lignin and Red Mud and Utilization for the Removal of Contaminants in the Water
  • Kim Eunji·Kim Naeun·Park Juyeong·Lee Heuiyun·Yoon Kwangsuk*

  • Department of Earth Resources and Environmental Engineering, Hanyang University, Seoul 04763, Republic of Korea

  • 리그닌과 적니의 공동 열분해를 통한 금속-바이오차 생산 및 수중 오염물질 제거를 위한 활용
  • 김은지·김나은·박주영·이희연·윤광석*

  • 한양대학교 자원환경공학과

  • This article is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.


With industrial development, the inevitable increase in both organic and inorganic waste necessitates the exploration of waste treatment and utilization methods. This study focuses on co-pyrolyzing lignin and red mud to generate metal-biochar, aiming to demonstrate their potential as effective adsorbents for water pollutant removal. Thermogravimetric analysis revealed mass loss of lignin below 660oC, with additional mass loss occurring (>660oC) due to the phase change of metals (i.e., Fe) in red mud. Characterization of the metal-biochar indicated porous structure embedded with zero-valent iron/magnetite and specific functional groups. The adsorption experiments with 2,4-dichlorophenol and Cd(II) revealed the removal efficiency of the two pollutants reached its maximum at the initial pH of 2.8. These findings suggest that co-pyrolysis of lignin and red mud can transform waste into valuable materials, serving as effective adsorbents for diverse water pollutants.

Keywords: Lignin, Red mud, Pyrolysis, Metal-biochar, Adsorption

This Article

  • 2024; 29(2): 1-10

    Published on Apr 30, 2024

  • 10.7857/JSGE.2024.29.2.001
  • Received on Apr 22, 2024
  • Revised on Apr 23, 2024
  • Accepted on Apr 25, 2024

Correspondence to

  • Yoon Kwangsuk
  • E-mail: yoongs8912@gmail.com