Biomass Novel Adsorbents for Phenol and Mercury Removal

Joao Manuel Valente Nabais, Carlos Eduardo Laguinhas, Silvia Román

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)
16 Downloads (Pure)

Abstract

This paper reports the use of activated carbons made from novel agriculture and industrial wastes, namely sunflower, vine shoots, and coffee endocarp, to remove two high-priority contaminants: phenol and mercury species (under different forms) from aqueous solutions. The activated carbons were used as prepared and also modified with nitric acid and triethylenediamine in order to explore additional adsorption mechanisms. The results showed an interesting potential of the materials to be used for water decontamination as indicated by the mercury uptake up to 1104 mg/g for Hg2+, 771 mg/g for [HgCl4]2−, 966 mg/g for HgCl2 and the maximum phenol adsorption capacity of 190 mg/g. The modification with triethylenediamine led to a significant increase in the phenol and mercury adsorption reaching an increment of 85% for phenol and 250% for Hg2+.

Original languageEnglish
Article number7345
JournalMolecules
Volume27
Issue number21
DOIs
Publication statusPublished - Nov 2022

Keywords

  • activated carbons
  • adsorption
  • biomass
  • mercury
  • phenol
  • water treatment

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