Adsorption behavior of Cr(VI) onto radiation crosslinked chitosan and its possible application for the treatment of wastewater containing Cr(VI)

Ramnani, S.P.; Sabharwal, S.

doi:10.1016/j.reactfunctpolym.2005.11.017

Cited by 110 publications

(50 citation statements)

References 15 publications

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“…The common regard about E is that it depicts adsorption by ion exchange when its value is between 8 and 16 kJ mol −1 [5]. The value of E calculated in this study is substantially lower than 8 kJ mol −1 indicating that the adsorption of Cr(VI) on chitosan occurs via physical adsorption due to weak van der Waals forces [26,27,31].…”

Section: Equilibrium Isothermsmentioning

confidence: 67%

“…Chitosan, a polymer of biological origin, has been reported to be an effective adsorbent for Cr(VI) removal from wastewater [17][18][19]21,25,31,34], however several different values have been determined for adsorption capacity and optimum process conditions. Since the cost of chitosan is considerably high, optimization is essential for efficient use of material.…”

Section: Discussionmentioning

confidence: 99%

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Adsorption of chromium on chitosan: Optimization, kinetics and thermodynamics

Aydin¹,

Aksoy²

2009

Chemical Engineering Journal

374

143

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Section: Equilibrium Isothermsmentioning

confidence: 67%

Section: Discussionmentioning

confidence: 99%

Adsorption of chromium on chitosan: Optimization, kinetics and thermodynamics

Aydin¹,

Aksoy²

2009

Chemical Engineering Journal

374

143

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“…During biosorption processes, the performances of different biological adsorbents such as chitosan, thuja oriantalis, activated rice husk carbon, neem leaves, activated red mud, hazelnut shell activated carbon, agave lechuguilla biomass and soya cake have been investigated for chromium adsorption. [10][11][12][13][14][15][16][17] In many adsorption processes, layered double hydroxide, Turkish brown coals, ozonised activated carbon, acrylate-based magnetic beads and bentonite clay have been studied as chemical adsorbents. [18][19][20][21][22][23] In addition to these studies, some industrial wastes such as fly ash and saw dust, and also Indian Rosewood timber have been preferred because of their economical usage.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Cr(III) from Aqueous Solution using Borax Sludge

Şenberber¹,

Yıldırım²,

Mermer³

et al. 2017

ACSi

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Borax sludge is the waste produced by a trommel sieve in the borax production process and is used as an adsorbent for Cr(III) removal. The effects of various parameters, including pH, initial Cr(III) concentration and contact time were investigated for batch adsorption of Cr(III). The experimental results obtained were applied to different adsorption isotherms and kinetic models. The results indicated that the Temkin isotherm (R 2 = 0.9749) was most suitable to explain the adsorption characteristics of borax sludge, and the removal of Cr(III) was achieved by a physisorption process. The overall kinetic data fitted the pseudo-second order rate model (R 2 = 0.9990). According to thermodynamic studies, which were carried out at different temperatures, changes in enthalpy (ΔH) and entropy (ΔS) values for Cr(III) adsorption by borax sludge were determined to be 69.395 kJ/mol and 0.276 kJ/mol K, respectively. The study implied that borax sludge could be used as an alternative adsorbent in the adsorption of Cr(III) from aqueous solutions.

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“…Chitosan has a wide range of applications in many fields. It may be used in membranes, 9 for removal of metal ions from waste water, 10 drug delivery systems, 11 biological applications, 12 tissue engineering, 13 biosensors, 14 scaffolds, 15 and packaging. 16 In addition, chitosan also provides bacteriostatic and fungistatic activities.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of polyurethane elastomers based on chitosan and poly(ε‐caprolactone)

Barikani

Honarkar

Barikani

2009

J of Applied Polymer Sci

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Biodegradable polyurethane (PU) elastomers with potential for biomedical and industrial applications were synthesized by the reaction of poly(ecaprolactone) (PCL) and isophorone diisocyanate (IPDI), extended with different mass ratio of chitosan and 1,4-butane diol (BDO). Their chemical structures were characterized using FTIR, 1 HNMR, and 13 CNMR, and thermal properties were determined by TGA and DMTA. Incorporation of chitosan contents into the polyurethane backbone caused improvement in thermal stability and thermal degradation rate. Optimum thermal properties and degradation profile were obtained from elastomer extended with chitosan. The crystallinity and hydrophilicity of the prepared polymers were also examined by Xray and contact angle measurements. The results showed that hydrophilicity decreased and crystallinity increased with increasing of chitosan content in polyurethane backbone.

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Adsorption behavior of Cr(VI) onto radiation crosslinked chitosan and its possible application for the treatment of wastewater containing Cr(VI)

Cited by 110 publications

References 15 publications

Adsorption of chromium on chitosan: Optimization, kinetics and thermodynamics

Adsorption of chromium on chitosan: Optimization, kinetics and thermodynamics

Adsorption of Cr(III) from Aqueous Solution using Borax Sludge

Synthesis and characterization of polyurethane elastomers based on chitosan and poly(ε‐caprolactone)

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