Removal of Toxic Cr(VI) Ions from Aqueous Solution Using Nano-Hydroxyapatite-Based Chitin and Chitosan Hybrid Composites

Kousalya, G.N.; Gandhi, Muniyappan Rajiv; Meenakshi, Sankaran

doi:10.1260/0263-6174.28.1.49

Cited by 49 publications

(14 citation statements)

References 37 publications

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“…Chromium (VI) The mutagenic and carcinogenic Cr(VI) is considered as a dangerous pollutant for humans and marine ecosystems. Composites of chitin and chitosan nano-hydroxyapatite hybrids removed Cr(VI) from aqueous solution by electrostatic interactions and reduction to Cr(III) via electron-donating groups present in the scaffold (Kousalya et al 2010). A nanocomposite cross-linked hybrid of chitosan-alginate was able to remove Cr(VI) from water waste (Gokila et al 2017).…”

Section: Removal Of Heavy Metal Ionsmentioning

confidence: 99%

Chitin/Chitosan: Versatile Ecological, Industrial, and Biomedical Applications

Merzendorfer

Cohen

2019

Biologically-Inspired Systems

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Chitin is a linear polysaccharide of N-acetylglucosamine, which is highly abundant in nature and mainly produced by marine crustaceans. Chitosan is obtained by hydrolytic deacetylation. Both polysaccharides are renewable resources, simply and cost-effectively extracted from waste material of fish industry, mainly crab and shrimp shells. Research over the past five decades has revealed that chitosan, in particular, possesses unique and useful characteristics such as chemical versatility, polyelectrolyte properties, gel-and film-forming ability, high adsorption capacity, antimicrobial and antioxidative properties, low toxicity, and biocompatibility and biodegradability features. A plethora of chemical chitosan derivatives have been synthesized yielding improved materials with suggested or effective applications in water treatment, biosensor engineering, agriculture, food processing and storage, textile additives, cosmetics fabrication, and in veterinary and human medicine. The number of studies in this research field has exploded particularly during the last two decades. Here, we review recent advances in utilizing chitosan and chitosan derivatives in different technical, agricultural, and biomedical fields.

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Section: Removal Of Heavy Metal Ionsmentioning

confidence: 99%

Chitin/Chitosan: Versatile Ecological, Industrial, and Biomedical Applications

Merzendorfer

Cohen

2019

Biologically-Inspired Systems

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“…Graphene oxide-CS nanocomposite films are formed with excellent mechanical and thermal properties [89], and montmorillonite-CS nanocomposites are produced with excellent biocompatibility and antimicrobial properties [89]. Moreover, CS-based composites were synthesized to be used as microcapsules in drug release systems [90], CS-porous-silica [91] and nanohydroxyapatite-CT derivative composites for bone regeneration [92], CS-zirconium composite as precursor of zirconium carbide [93], CS-barium sulfate composite fibers for endovascular prosthesis, fibrous embolic agent, bone substitution, and X-ray marker [89], CS composite reinforced with carbon nanotubes for biomedicine [78], and CS-hydroxyapatite-glycopolymer/cloisite composite for biomedical applications [94].…”

Section: Properties Of Chitosanmentioning

confidence: 99%

Hydrogels Based on Chitosan and Chitosan Derivatives for Biomedical Applications

Rufato¹,

Galdino²,

Ody³

et al. 2019

Hydrogels - Smart Materials for Biomedical Applications

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Chitosan (CS) is a polymer obtained from chitin, being this, after the cellulose, the most abundant polysaccharide. The fact of (i) CS being obtained from renewable sources; (ii) CS to possess capability for doing interactions with different moieties being such capability dependent of pH; (iii) plenty of possibilities for chemical modification of CS; and (iv) tuning the final properties of CS derivatives makes this polymer very interesting in academic and technological points of view. In this way, hydrogels based on CS and on CS derivatives have been widely used for biomedical applications. Other important technological applications can be also cited, such as adsorbent of metals and dyes in wastewater from industrial effluents. In pharmaceutical field, hydrogels based on CS are often used as drugs' and proteins' carrier formulations due to the inherent characteristics such as the biocompatibility, nontoxicity, hydrophilicity, etc. This chapter is an attempt for updating and joining the plenty of available information regarding the preparation, characterization, and biomedical application of hydrogels based on chitosan and chitosan derivatives. More than 260 references are provided, being the majority of them published in the last 10 years.

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“…The dominant form of Cr (VI) is HCrO4while the surface of the adsorbent is positively charged. The increase in Cr (VI) adsorption is due to the electrostatic attraction between the positively charged adsorbent surface groups 14 and HCrO4. Which predominate at a value lower than pH = 3.…”

Section: Effect Of Phmentioning

confidence: 99%

REMOVAL OF Cr (VI) FROM AQUEOUS SOLUTION BY ADSORPTION ON THE NATURAL AND ACTIVATED FLUORAPATITE

Billah¹,

Elyamani²,

Rakhila³

et al. 2019

RJC

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The present paper to study the immobilization of chromium ions Cr(VI) in an aqueous solution by adsorption on a natural phosphate (PN) and activated (PA).The natural phosphate whose main component is fluorapatite Ca10(PO4)6F2. The study of the retention of chromium (VI) ions on natural and activated flourapatite is conditioned by several parameters namely the pH. The initial concentration of metals and the contact time. Results obtained showed that after 40 minutes of contact. The results obtained showed that after 40 minutes of contact, the elimination of chromium (VI) was maximum with a yield of 67.4% for the natural flouraptite and 75.9% for the activated phosphate. Increasing the adsorbent dose (0.5 to 1 g/l) makes it possible to improve the chromium removal efficiency with an initial concentration (10 mg/l) / l. The efficiency of removing chromium (VI) by each adsorbent decreases with the increases of the initial chromium content (2 to 10 mg / l). PH has a significant effect on the retention rate of chromium (VI). The efficiency of removing Cr (VI) is interesting for acid pH. Moreover, the adsorption of this compound we described by the kinetic models of Langmuir and Freundlich.

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Removal of Toxic Cr(VI) Ions from Aqueous Solution Using Nano-Hydroxyapatite-Based Chitin and Chitosan Hybrid Composites

Cited by 49 publications

References 37 publications

Chitin/Chitosan: Versatile Ecological, Industrial, and Biomedical Applications

Chitin/Chitosan: Versatile Ecological, Industrial, and Biomedical Applications

Hydrogels Based on Chitosan and Chitosan Derivatives for Biomedical Applications

REMOVAL OF Cr (VI) FROM AQUEOUS SOLUTION BY ADSORPTION ON THE NATURAL AND ACTIVATED FLUORAPATITE

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