• Fabrication of Metal-biochar Composite through CO2 Assisted Co-pyrolysis of Chlorella and Red Mud and Its Application for Persulfate Activation

  • Jang Hee-Jin1·Gihoon Kwon1·Kwangsuk Yoon·Hocheol Song1*

  • 1Department of Environment and Energy, Sejong University, Seoul 05006, South Korea

  • 녹조류와 적니의 이산화탄소환경 공동열분해를 통한 탄소-철 복합체 생성 및 과황산염 활성화를 통한 수중 염료 제거

  • 장희진1·권기훈1·윤광석1·송호철1*

  • 1세종대학교 환경에너지융합학과

  • 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.

Abstract

The common algae and industrial waste, chlorella and red mud, were co-pyrolyzed in carbon dioxide condition to fabricate iron-biochar composite. In order to investigate the direct effect of chlorella and red mud in the syngas generation and the property of biochar, experiments were performed using mixture samples of chlorella and red mud. The evolution of flammable gasses (H2, CH4, CO) was monitored during pyrolysis. The produced biochar composite was employed as a catalyst for persulfate activation for methylene blue removal. BET analysis indicated that the iron-biochar composite mainly possessed meso- and macropores. The XRD analysis revealed that hematite (Fe2O3) contained in red mud was transformed to Fe3O4 during co-pyrolysis. The composite effectively activated persulfate and removed methylene blue. Among the composite samples, the composite fabricated from the mixture composed of 1:2 chlorella:red mud showed the best performance in syngas generation and methylene blue removal.


Keywords: Co-pyrolysis, Biochar, Algae, Red Mud, Persulfate Activation

This Article

  • 2022; 27(1): 31-38

    Published on Feb 28, 2022

  • 10.7857/JSGE.2022.27.1.031
  • Received on Dec 1, 2021
  • Revised on Dec 6, 2021
  • Accepted on Feb 17, 2022

Correspondence to

  • Hocheol Song

  • Department of Environment and Energy, Sejong University, Seoul 05006, South Korea

  • E-mail: hcsong@sejong.ac.kr