Journal: Journal of Soil and Groundwater Environment

Author: HeeJin Jang, Gihoon Kwon, Kwangsuk Yoon, Hocheol Song

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

DOI: https://doi.org/10.7857/JSGE.2022.27.1.031