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Microalgal-based biochar in wastewater remediation: Its synthesis, characterization and applications

Law, Xin Ni, Cheah, Wai Yan, Chew, Kit Wayne, Ibrahim, Mohamad Faizal, Park, Young-Kwon, Ho, Shih-Hsin, Show, Pau Loke·2022·Environmental Research
DOI 10.1016/j.envres.2021.111966
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Abstract

Microalgae are drawing attentions among researchers for their biorefinery use or value-added products. The high production rate of biomasses produced are attractive for conversion into volatile biochar. Torrefaction, pyrolysis and hydrothermal carbonization are the recommended thermochemical conversion techniques that could produce microalgal-based biochar with desirable physiochemical properties such as high surface area and pore volume, abundant surface functional groups, as well as functionality such as high adsorption capacity. The characterizations of the biochar significantly influence the mechanisms in adsorption of pollutants from wastewaters. Specific adsorption of the organic and inorganic pollutants from the effluent are reviewed to examine the adsorption capacity and efficiency of biochar derived from different microalgae species. Last but not least, future remarks over the challenges and improvements are discussed accordingly. Overall, this review would discuss the synthesis, characterization and application of the microalgal-based biochar in wastewater.

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  • Functional groups such as hydroxyl and carboxyl on the surface of biomass-based adsorbents determine the hydrophobicity or hydrophilicity of biochar and its adsorptive mechanism.

    “Functional groups (hydroxyl, carboxyl, etc.) on the surface of biomass-based adsorbents are important properties determining the hydrophobicity or hydrophilicity of biochar as well as their adsorptive mechanism (Law et al., 2021).”

    From Biomass-Based Adsorbents for Removal of Dyes From Wastewater: A Review (2021) · cites this paper as Law et al., 2021

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Metadata

Authors
Law, X. N., Cheah, W. Y., Chew, K. W., Ibrahim, M. F., Park, Y.-K., Ho, S.-H., & Show, P. L.
ORCID
Venue
Environmental Research
Publisher
Elsevier BV
Published
2022-03
Volume
204
Pages
111966
ISSN
0013-9351
DOI
10.1016/j.envres.2021.111966
Cited by
168
References
6
Language
en
Licence
Funders
  • National Natural Science Foundation of China (52070057)
  • Ministry of Science, ICT and Future Planning (2021M3D3A1A01022116)
  • National Research Foundation of Korea
  • University of Nottingham - Malaysia Campus

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