A review of biomass hydrochar as an adsorbent: Performance, modification, and applications
Release time:2025-02-27 Hits:
DOI number:10.1016/j.jwpe.2025.107314
Journal:Journal of Water Process Engineering
Key Words:Hydrochar
Hydrothermal carbonization
Adsorption capacity
Adsorption modification
Pollutant adsorption
Abstract:Biomass hydrochar, an essential adsorbent, holds enormous potential for addressing a broad spectrum of environmental pollution issues. In this paper, the performance, modification, and applications of biomass hydrochar as an adsorbent have been reviewed, including an in-depth analysis of how biomass properties and hydrothermal conditions influence its adsorption efficacy. The results show that hydrochars derived from biomass rich in humic acid and lignocellulose exhibit superior adsorptivity. Hydrothermal temperatures ranging from 180 to 220 °C and extended duration times are beneficial to the adsorptivity of biomass hydrochar. This review also outlines the diverse modification techniques, both physical and chemical, used to enhance biomass hydrochar. Physical modifications primarily aim to expand the specific surface area, while chemical modifications enrich the surface with oxygen-containing functional groups. Heteratom doping modifications can notably bolster the metal ion adsorptivity of biomass hydrochar, whereas acid-base modifications enhance its adsorptivity for organic compounds, such as dyes or antibiotics. For future outlooks, three research directions are recommended: integrated physico-chemical modifications, a deeper understanding of adsorption mechanisms aided by microscopic characterization technology, and expanded applications of biomass hydrochar.
Volume:71
Page Number:107314
Translation or Not:no
Date of Publication:2025-02-27
Included Journals:SCI
Links to published journals:https://www.sciencedirect.com/science/article/pii/S2214714425003861
