Review Paper:
Biochar based
dye removal from industrial effluents: A review
Sharma Rajni, Mathur Dipti, Shrivastava Kriti and Soni Swaroop
Res. J. Chem. Environ.; Vol. 29(4); 111-118;
doi: https://doi.org/10.25303/294rjce1110118; (2025)
Abstract
During recent years, numerous investigations have been carried out to explore the
potential of biochar to remove organic and inorganic pollutants from wastewater.
In the field of dye adsorption, activated carbon is the most widely used adsorbent,
but its activation and regeneration costs are high. Several alternative adsorbents
are being investigated to remove dyes from aqueous media. Bio chars are a class
of alternative adsorbents, which are normally produced by pyrolysis of agricultural
wastes, wood, or other biomasses in oxygen–limited conditions.
Bio char is a carbon rich material produced from waste biomass by thermochemical
conversion methods. It is used as a bio sorbent in removal process of various pollutants
and its efficiency is strongly influenced by the characteristics of the biomass
feed stock and method of production. This review aims to understand the sorption
behaviour of dyes on to bio char-based bio sorbent. The mechanism describing bio
sorption behaviour of biochar and the factors influencing the bio sorption behaviour
process have been broadly reviewed in this study. The bio sorption model can also
be used to comprehend the potential of the bio char as bio sorbent for dye removal.
