Water decontamination using bio-based, chemically functionalized, doped, and ionic liquid-enhanced adsorbents: review

Ehsan Nazarzadeh Zare, Ackmez Mudhoo, Moonis Ali Khan, Marta Otero, Zumar Muhammad Ali Bundhoo, Chanaka Navarathna, Manvendra Patel, Anju Srivastava, Charles U. Pittman, Todd Mlsna, Dinesh Mohan, Pooyan Makvandi, Mika Sillanpää

Research output: Contribution to journalReview articlepeer-review

38 Citations (Scopus)

Abstract

The access to clean water is a critical issue in the context of climate change and worldwide pollution, calling for advanced methods of purification. Recent advances in materials science, nanoscience, and analytical chemistry have led to the design of novel nanoadsorbents having a unique properties, structure, and adsorption performances. In particular, research has focused on all-inclusive adsorbents which can remove different contaminants simultaneously. Here, we review the adsorption dynamics of doped, ionic liquid-enhanced, bio-based, and chemically functionalized materials. We examine their characteristics, underlying principles of adsorption, and their potential limitations in adsorbing various metal ions and xenobiotics. We found that chemical functionalization with specific organic moieties is a preferred approach for enhancing the adsorption capacities and selectivity of raw materials. Moreover, doping can also modulate the morphology, electronic structure, and surface chemistry for higher performance. Ionic liquids are promising solvents for the synthesis of stable adsorbents, owing to ionic liquid ability to pull other molecules through hydrogen bonds or electrostatic forces.

Original languageEnglish
Pages (from-to)3075-3114
Number of pages40
JournalEnvironmental Chemistry Letters
Volume19
Issue number4
DOIs
Publication statusPublished - Aug 2021

Keywords

  • Adsorbent
  • Bio-based materials
  • Doping
  • Functionalization
  • Ionic liquid
  • Organic and inorganic pollutants

ASJC Scopus subject areas

  • Environmental Chemistry

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