Agricultural biomass/waste as adsorbents for toxic metal decontamination of aqueous solutions

Ioannis Anastopoulos*, Ioannis Pashalidis, Ahmad Hosseini-Bandegharaei, Dimitrios A. Giannakoudakis, Artis Robalds, Muhammad Usman, Leticia Belén Escudero, Yaoyu Zhou, Juan Carlos Colmenares, Avelino Núñez-Delgado, Éder Claudio Lima

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

105 Citations (Scopus)

Abstract

Toxic metals can be present in the environment, causing negative effects on the ecosystem and human health. Although several technologies have been used for decontamination purposes, biosorption is an environmentally friendly and cost-effective alternative to remove toxic metals from wastewater. Agricultural biomasses are a class of biosorbents that offer several advantages, including their low cost, availability in nature, simplicity to be obtained and used as adsorbents. This review article is focused on the use of agricultural biomass materials for the removal of toxic metal(oid)s from contaminated aqueous matrices. In addition, raw and modified forms of these biosorbents are considered as precursors for the preparation of other adsorbents like biochar. Following agricultural biomasses are discussed: i) watermelon, ii) potato, iii) cucumber, iv) peanut, v) almond, vi) walnut and hazelnut, vii) pistachio, and viii) tea waste-based biosorbents. The adsorption potential of the biomasses is exhibited under the optimum experimental conditions, and their characterization and possibility to reuse is also considered. Moreover, isotherm and equilibrium parameters of the metal(oid) adsorption by the biomasses are discussed. Specifically, thermodynamic studies are described in order to better understand the nature of the biosorption process between contaminant and biomass. All these considerations reflect the high potential of agricultural waste-based adsorbents for toxic metal(oid)s removal related to wastewater treatment technologies.

Original languageEnglish
Article number111684
JournalJournal of Molecular Liquids
Volume295
DOIs
Publication statusPublished - Dec 1 2019

Keywords

  • Agricultural wastes
  • Biosorption
  • Equilibrium modelling
  • Isotherms
  • Thermodynamic studies
  • Toxic metal(s)

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Spectroscopy
  • Physical and Theoretical Chemistry
  • Materials Chemistry

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