Sustainable wastewater treatment by biochar/layered double hydroxide composites: Progress, challenges, and outlook

Mukarram Zubair, Ihsanullah Ihsanullah*, Hamidi Abdul Aziz, Mohd Azmier Ahmad, Mamdouh A. Al-Harthi

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

157 Scopus citations

Abstract

Biochar/layered double hydroxide (LDH) composites have gained considerable attention in recent times as low-cost sustainable materials for applications in water treatment. This paper critically evaluates the latest development in applications of biochar/LDH composites in water treatment with an emphasis on adsorption and catalytic degradation of various pollutants. The adsorption of various noxious contaminants, i.e., heavy metals, dyes, anions, and pharmaceuticals onto biochar/LDH composites are described in detail by elaborating the adsorption mechanism and regeneration ability. The synergistic effect of LDH with biochar exhibited significant improvement in specific surface area, surface functional groups, structure heterogeneity, stability, and adsorption characteristics of the resulting biochar/LDH composites. The major hurdles and challenges associated with the synthesis and applications of biochar/LDH composites in water remediation are emphasized. Finally, a roadmap is suggested for future research to assure the effective applications of biochar/LDH composites in water purification.

Original languageEnglish
Article number124128
JournalBioresource Technology
Volume319
DOIs
StatePublished - Jan 2021

Bibliographical note

Publisher Copyright:
© 2020 Elsevier Ltd

Keywords

  • Adsorption
  • Biochar
  • Layered double hydroxide
  • Sustainable adsorbent
  • Water treatment

ASJC Scopus subject areas

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

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