Sulfur-Containing Chitin and Chitosan Derivatives as Trace Metal Adsorbents: A Review

Yong, Soon Kong; Bolan, Nanthi; Lombi, Enzo; Skinner, William; Guibal, Eric

doi:10.1080/10643389.2012.671734

Cited by 48 publications

(22 citation statements)

References 127 publications

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“…However, chitosan is very sensitive to pH and easily is dissolved in acid media (pH < 3), which limits its wide application in many fields. The chemical modification of chitosan with epichlorohydrin, tripolyphosphate and glutaraldehyde is regarded as an alternative to overcome the weakness (Varma, Deshpande, & Kennedy, 2004;Yong, Bolan, Lombi, Skinner, & Guibal, 2013). The cross-linked chitosan polymers not only enhance chitosan's resistance to acid media but also improve its adsorption capability (Crini, 2006;Yong et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Cross-linked chitosan polymers as generic adsorbents for simultaneous adsorption of multiple mycotoxins

et al. 2015

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Section: Introductionmentioning

confidence: 99%

Cross-linked chitosan polymers as generic adsorbents for simultaneous adsorption of multiple mycotoxins

et al. 2015

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“…This lack of toxicity, coupled with its rapid degradability, makes chitosan suitable for several environmental and agricultural uses (Uthairatanakij et al 2007). Some applications of chitosan include drug delivery in the human gastrointestinal tract (Cook et al 2013), a role in food processing (Dutta et al 2009;Romanazzi et al 2012), biomedical use (Dash et al 2011;Jayakumar et al 2010;Khor and Lim 2003;Kim et al 2007;Muzzarelli 2009), an ingredient in cosmetics (Desbrieres et al 2010), enzyme immobilization (Krajewska 2004), serving as a heterogeneous catalyst (Guibal 2005), a sorbent for organic and inorganic contaminants (Guibal et al 2006;Wan Ngah et al 2011;Wu et al 2010;Yong et al 2012), a component of antimicrobial products (Kong et al 2010), and as an agent to help recover uranium (Muzzarelli 2011). Soil and water pollution by organic and inorganic contaminants, including metal (loid)s, is of growing concern, because of their potential detrimental effects on human health and the environment (Adriano 2001).…”

Section: Introductionmentioning

confidence: 99%

Environmental Applications of Chitosan and Its Derivatives

Yong

Shrivastava

Srivastava

et al. 2014

Reviews of Environmental Contamination and Toxicology Volume 233

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Chitosan originates from the seafood processing industry and is one of the most abundant of bio-waste materials. Chitosan is a by-product of the alkaline deacetylation process of chitin. Chemically, chitosan is a polysaccharide that is soluble in acidic solution and precipitates at higher pHs. It has great potential for certain environmental applications, such as remediation of organic and inorganic contaminants, including toxic metals and dyes in soil, sediment and water, and development of contaminant sensors. Traditionally, seafood waste has been the primary source of chitin. More recently, alternative sources have emerged such as fungal mycelium, mushroom and krill wastes, and these new sources of chitin and chitosan may overcome seasonal supply limitations that have existed. The production of chitosan from the above-mentioned waste streams not only reduces waste volume, but alleviates pressure on landfills to which the waste would otherwise go. Chitosan production involves four major steps, viz., deproteination, demineralization, bleaching and deacetylation. These four processes require excessive usage of strong alkali at different stages, and drives chitosan's production cost up, potentially making the application of high-grade chitosan for commercial remediation untenable. Alternate chitosan processing techniques, such as microbial or enzymatic processes, may become more cost-effective due to lower energy consumption and waste generation. Chitosan has proved to be versatile for so many environmental applications, because it possesses certain key functional groups, including - OH and -NH2 . However, the efficacy of chitosan is diminished at low pH because of its increased solubility and instability. These deficiencies can be overcome by modifying chitosan's structure via crosslinking. Such modification not only enhances the structural stability of chitosan under low pH conditions, but also improves its physicochemical characteristics, such as porosity, hydraulic conductivity, permeability, surface area and sorption capacity. Crosslinked chitosan is an excellent sorbent for trace metals especially because of the high flexibility of its structural stability. Sorption of trace metals by chitosan is selective and independent of the size and hardness of metal ions, or the physical form of chitosan (e.g., film, powder and solution). Both -OH and -NH2 groups in chitosan provide vital binding sites for complexing metal cations. At low pH, -NH3 + groups attract and coagulate negatively charged contaminants such as metal oxyanions, humic acids and dye molecules. Grafting certain functional molecules into the chitin structure improves sorption capacity and selectivity for remediating specific metal ions. For example, introducing sulfur and nitrogen donor ligands to chitosan alters the sorption preference for metals. Low molecular weight chitosan derivatives have been used to remediate metal contaminated soil and sediments. They have also been applied in permeable reactive barriers to remediate metals in soil and groun...

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“…Chitosan is the most popular adsorbents for removal of metal ions, composed of poly (b-1,4)-2-amino-2-deoxy-D-glucopyranose. Chitosan and its derivative had reported able to act as a natur adsorbent in order to remove of metal ion from an aquoeos solution [5][6] . Chitosan as an heavy metal adsorbent is very high capability however its ability limited because of the weakness such as swelling, unsatisfying mechanical properties and solubility in acidic condition 7,8 .…”

Section: Introductionmentioning

confidence: 99%

Preparation of Pb(II)-Carboxymethyl Chitosan Pec PEGDE Film as Selective Asorbent for Removal Pb(II) Ion

Hastuti¹,

Mudasir²,

Siswanta³

et al. 2017

Orient. J. Chem

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The aims of this research is to synthesize Pb(II)-Carboxymethyl Chitosan-Pectin crosslinked Polyethylene Glycol Diglisidyl Ether (Pb(II)-CCPecP) film by using templated ion of Pb 2+ as selective adsorbent for Pb(II) ion. The structure of Pb(II)-CCPecP film adsorbent were characterized by FT-IR and scanning electron microscopy (SEM). The adsorption properties of Pb(II)-CCPecP film adsorbent in order to adsorp of Pb(II) ion in presence Cu(II) and Zn(II) were evaluated. FT-IR showed visible peak at 3441 and 1628 cm -1 indicate the film adsorbent have -COOH and -OH active group. The SEM of Pb(II)-CCPecP film show smoother surface and some holes and gaps are formed. The optimum condition for adsorption of Pb(II) ions by Pb(II)-CCPecP film adsorbent was occur at pH 5 and 200 min contacting time. The adsorption of Pb(II)-CCPecP film adsorbent toward Pb 2+ was higher compared with Zn 2+ and Cu 2+ metal ion. The results revealed that the film was capable to removal of Pb(II) ion selectively in solution containing single metal ion or coexistence of three metals ion of Zn 2+ and Cu 2+ .

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Sulfur-Containing Chitin and Chitosan Derivatives as Trace Metal Adsorbents: A Review

Cited by 48 publications

References 127 publications

Cross-linked chitosan polymers as generic adsorbents for simultaneous adsorption of multiple mycotoxins

Cross-linked chitosan polymers as generic adsorbents for simultaneous adsorption of multiple mycotoxins

Environmental Applications of Chitosan and Its Derivatives

Preparation of Pb(II)-Carboxymethyl Chitosan Pec PEGDE Film as Selective Asorbent for Removal Pb(II) Ion

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