A critical review on recent developments in MOF adsorbents for the elimination of toxic heavy metals from aqueous solutions

Effective and substantial remediation of contaminants especially heavy metals from water is still a big challenge in terms of both environmental and biological perspectives because of their adverse effects on the human health. Many techniques including adsorption, ion exchange, co-precipitation, che...

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Bibliographic Details
Published in:Environmental science and pollution research international 2020-12, Vol.27 (36), p.44771-44796
Main Authors: Rani, Lata, Kaushal, Jyotsna, Srivastav, Arun Lal, Mahajan, Pooja
Format: Article
Language:English
Subjects:
Adsorbents
Adsorption
Aquatic Pollution
Aqueous solutions
Arsenates
Arsenic
Arsenite
Atmospheric Protection/Air Quality Control/Air Pollution
Cadmium
Chemical precipitation
Chemical reduction
Chromium
Contaminants
Contamination
Earth and Environmental Science
Ecotoxicology
Environment
Environmental Chemistry
Environmental Health
Environmental science
Heavy metals
Ion exchange
Lead
Mercury
Mercury (metal)
Metal ions
Metal-organic frameworks
Remediation
Review Article
Selectivity
Surface stability
Ultrafiltration
Waste Water Technology
Water Management
Water Pollution Control
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Summary:Effective and substantial remediation of contaminants especially heavy metals from water is still a big challenge in terms of both environmental and biological perspectives because of their adverse effects on the human health. Many techniques including adsorption, ion exchange, co-precipitation, chemical reduction, ultrafiltration, etc. are reported for eliminating heavy metal ions from the water. However, adsorption has preferred because of its simple and easy handlings. Several types of adsorbents are observed and documented well for the purpose. Recently, highly porous metal-organic frameworks (MOFs) were developed by incorporating metals and organic ligands together and claimed as potent adsorbents for the remediation of highly toxic heavy metals from the aqueous solutions due to their unique features like greater surface area, high chemical stability, green and reuse material, etc. In this review, the authors discussed systematically some recent developments about secure MOFs to eliminate the toxic metals such as arsenic (both arsenite and arsenate), chromium(VI), cadmium (Cd), mercury (Hg) and lead (Pb). MOFs are observed as the most efficient adsorbents with greater selectivity as well as high adsorption capacity for metallic contamination. Graphical abstract
ISSN:0944-1344
1614-7499
DOI:10.1007/s11356-020-10738-8