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Removal of Mercury Ions from Aqueous Solutions by Crosslinked Chitosan‐based Adsorbents: A Mini Review
Author(s) -
Zhang Dan,
Crini Grégorio,
Lichtfouse Eric,
Rhimi Baker,
Wang Chuanyi
Publication year - 2020
Publication title -
the chemical record
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.61
H-Index - 78
eISSN - 1528-0691
pISSN - 1527-8999
DOI - 10.1002/tcr.202000073
Subject(s) - adsorption , mercury (programming language) , chitosan , metal ions in aqueous solution , bentonite , chelation , aqueous solution , environmental remediation , activated carbon , chemistry , cellulose , environmental chemistry , inorganic chemistry , ion , chemical engineering , organic chemistry , contamination , computer science , ecology , engineering , biology , programming language
Abatement of mercury emissions in air and waters has become a global challenge due to the toxicity of mercury species for life, yet actual remediation techniques are limited. In particular, adsorption of mercury ions onto solids is widely used but most adsorption techniques are not specific, and in turn, removal efficiency is lower. Adsorbents developed so far include activated carbon, clay, bentonite, cellulose and chitosan. Chitosan derivatives have recently attracted research attention for water purification because their molecular frames contain a large amount of −NH 2 and −OH groups that can chelate with metal ions specifically. This manuscript reviews recent advances in chitosan‐based adsorbents designed to remove mercury ions from wastewater. Focus is placed on their design, synthesis, characterization, adsorption properties, adsorption mechanisms and applications.