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Review
. 2017 Jan 7;18(1):114.
doi: 10.3390/ijms18010114.

Chitin Adsorbents for Toxic Metals: A Review

Ioannis Anastopoulos  1   2 , Amit Bhatnagar  3 , Dimitrios N Bikiaris  4 , George Z Kyzas  5
Affiliations
Review

Chitin Adsorbents for Toxic Metals: A Review

Ioannis Anastopoulos et al. Int J Mol Sci. .

Abstract

Wastewater treatment is still a critical issue all over the world. Among examined methods for the decontamination of wastewaters, adsorption is a promising, cheap, environmentally friendly and efficient procedure. There are various types of adsorbents that have been used to remove different pollutants such as agricultural waste, compost, nanomaterials, algae, etc., Chitin (poly-β-(1,4)-N-acetyl-d-glucosamine) is the second most abundant natural biopolymer and it has attracted scientific attention as an inexpensive adsorbent for toxic metals. This review article provides information about the use of chitin as an adsorbent. A list of chitin adsorbents with maximum adsorption capacity and the best isotherm and kinetic fitting models are provided. Moreover, thermodynamic studies, regeneration studies, the mechanism of adsorption and the experimental conditions are also discussed in depth.

Keywords: adsorption; chitins; heavy metals; isotherms; thermodynamics.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Chemical structure of (a) chitosan and (b) chitin.
Figure 2
Figure 2
Chemical structure of chitin.
Figure 3
Figure 3
The enthalpy-entropy compensation plot for the works studied in the present review article (eight experimental points included).
See this image and copyright information in PMC

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