(2023) Bioresource Technology_Strategic use of crop residue biochars for removal of hazardous compounds in wastewater

Cho S.-H., Jung S., Park J., Lee S., Kim Y., Lee J., Fai Tsang Y., Kwon E.E.

(Elsevier Ltd) Bioresource Technology ISSN: 9608524 Vol.387 Issue. Article No.129658 DOI: 10.1016/j.biortech.2023.129658

Crop residues are affordable lignocellulosic waste in the world, and a large portion of the waste has been burned, releasing toxic pollutants into the environment. Since the crop residue is a carbon and ingredient rich material, it can be strategically used as a sorptive material for (in)organic pollutants in the wastewater after thermo-chemical valorization (i.e., biochar production). In this review, applications of crop residue biochars to adsorption of non-degradable synthetic dyes, antibiotics, herbicides, and inorganic heavy metals in wastewater were discussed. Properties (porosity, functional groups, heteroatom, and metal(oxide)s, etc.) and adsorption capacity relationships were comprehensively reviewed. The current challenges of crop residue biochars and guidelines for development of efficient adsorbents were also provided. In the last part, the future research directions for practical applications of the crop residue biochars in wastewater treatment plants have been suggested. © 2023 Elsevier Ltd

This research was supported by Kyungpook National University Research Fund, 2022.