Zirconium cross-linked chitosan composite: Preparation, characterization and application in adsorption of Cr(VI)

Zhang, Lingfan; Xia, Wei; Teng, Bo; Liu, Xin; Zhang, Wenqing

doi:10.1016/j.cej.2013.05.102

Cited by 89 publications

(29 citation statements)

References 32 publications

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“…Some of biopolymers such as alginate, microalgal, chitin and chitosan have been studied for the removal of heavy metals. The advantages of such materials are their natural abundance, nontoxicity, environment friendliness and cost effectiveness (Zhang et al, 2013).…”

Section: Biocomposite Sorbentsmentioning

confidence: 99%

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Application of biopolymer composites in arsenic removal from aqueous medium: A review

Rahim

Haris

2015

Journal of Radiation Research and Applied Sciences

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Polymeric sorbents and biocomposites a b s t r a c t Various sorbents have been used to remove arsenic from contaminated water which is one of the most toxic elements for mankind. In this review, concentration has been focused on the removal of arsenic from aqueous medium using natural, non-toxic, biodegradable and eco-friendly polymeric materials. Therefore, chitosan has been selected one of the most appropriate biopolymer to remove heavy metals form contaminated water particularly arsenic. Therefore, chitosan grafting, blending, doping and biocomposite formulations with polymeric and/or activated inorganic materials have gained much attention. This review provides the relevant literature on the applications of polymeric biocomposites for removal of arsenic from aqueous medium. However, the literature survey reveals that very limited attention has been focused on the applications of biocomposites for the removal of arsenic in the past. The sorption capacities of sorbents and LD 50 of the arsenic compounds have been compiled.

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Section: Biocomposite Sorbentsmentioning

confidence: 99%

“…Recently, biosorption has becoming an emerging and effective wastewater treatment technique (Zhang, Xia, Teng, Liu, & Zhang, 2013). The study of biocomposites is one of the most attractive research field due to biodegradability and ecofriendliness (Wang, Zhu, Yao, & Wilkie, 2002).…”

Section: Biocomposite Sorbentsmentioning

confidence: 99%

Application of biopolymer composites in arsenic removal from aqueous medium: A review

Rahim

Haris

2015

Journal of Radiation Research and Applied Sciences

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“…Complete adsorption equilibrium was reached after 120 min. Since the adsorption process is an endothermic nature, the uptake of Cr(VI) (3.71-3.85 mg/g) is enhanced as the temperature increased from 288 to 313 K. The increase of adsorption capacity corresponding to increased temperature indicated that the adsorption of Cr(VI) ions by CCPM might involve physical as well as chemical sorption [16].…”

Section: Effect Of Contact Time and Temperaturementioning

confidence: 93%

“…The R L value determines the feasibility of adsorption process. The obtained R L values (listed in Table 1) were lying between 0 and 1, which indicated that the adsorption of Cr(VI) was favorable [16]. The Freundlich isotherm [20], an empirical equation, can be applied for adsorption onto heterogeneous surfaces and multi-molecular layer.…”

Section: Adsorption Isothermsmentioning

confidence: 98%

Adsorptive removal of Cr(VI) from aqueous solutions with an effective adsorbent: cross-linked chitosan/montmorillonite nanocomposites in the presence of hydroxy-aluminum oligomeric cations

Wang

Duan

Sun

et al. 2016

Desalination and Water Treatment

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2015):Adsorptive removal of Cr(VI) from aqueous solutions with an effective adsorbent: cross-linked chitosan/montmorillonite nanocomposites in the presence of hydroxy-aluminum oligomeric cations, Desalination and Water Treatment, A B S T R A C TOn the basis of laboratory research, the adsorbent of cross-linked chitosan/Al 13 -pillared montmorillonite (CCPM) was examined on the removal of Cr(VI) from aqueous solutions. In order to determine the effects of process parameters namely cross-linked chitosan-to-clay ratio, temperature, initial solution pH, initial Cr(VI) concentration, adsorbent dose, and contact time on Cr(VI) uptake, batch studies were systematically conducted. Equilibrium data were applied to the Langmuir and Freundlich isotherm models and best described by the Langmuir isotherm model. It was shown that monolayer adsorption capacity was 15.67 mg/g of Cr(VI) obtained by the Langmuir isotherm model. The kinetics of adsorption correlated well with the pseudo-second-order equation. Moreover, the intra-particle diffusion model was applied to investigate the mechanism of adsorption. Furthermore, thermodynamic parameters including free energy change, enthalpy change, and entropy change revealed that the adsorption of Cr(VI) onto CCPM was endothermic and spontaneous. The results suggest that CCPM is an effective adsorbent for removing Cr(VI) ions from aqueous solutions.

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“…The major bands for chitosan powder could be assigned as follows: 3,433 cm −1 (-OH and -NH2 stretching vibrations), 2,924 cm −1 (-CH-stretching vibration in -CH-and -CH2-), 1,657 cm −1 (-NH2 bending vibration), 1,380 cm −1 (-CH-symmetric bending vibration in -CHOH-), 1,080 and 1,029 cm −1 (-CO-stretching vibration in -CONH-) ( Fig. 1a) (Zhang et al 2013). FT-IR spectrum of chitosan beads (Fig.…”

Section: Ft-ir Analysismentioning

confidence: 98%

Removal of Patulin from Aqueous Solution Using Cross‐Linked Chitosan Beads

Wang

Meng

et al. 2015

Journal of Food Safety

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Chitosan beads were prepared by the method of inverse suspension cross‐linking characterized and applied to remove patulin from aqueous solution. Batch adsorption experiments were performed to evaluate the optimum adsorption conditions and reusability. The results showed that chitosan beads were effective in removing patulin from aqueous solution. The maximum adsorption capacity of chitosan beads for patulin was 626.4 μg/g at pH 7.0, 40C for 24 h. The kinetics and isotherm models were investigated to characterize the mechanism of patulin adsorption. Adsorption process of patulin on chitosan beads could be described by pseudo second‐order model and Freundlich adsorption isotherm model. It was concluded that chitosan beads were very promising biosorbent for patulin removal from aqueous solution. Practical Applications This study established the basis for the removal of patulin from aqueous solution, and chitosan beads were applied to strengthen the control of patulin for the first time. Therefore, this work was of great significance in protecting human health from patulin contamination.

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Zirconium cross-linked chitosan composite: Preparation, characterization and application in adsorption of Cr(VI)

Cited by 89 publications

References 32 publications

Application of biopolymer composites in arsenic removal from aqueous medium: A review

Application of biopolymer composites in arsenic removal from aqueous medium: A review

Adsorptive removal of Cr(VI) from aqueous solutions with an effective adsorbent: cross-linked chitosan/montmorillonite nanocomposites in the presence of hydroxy-aluminum oligomeric cations

Removal of Patulin from Aqueous Solution Using Cross‐Linked Chitosan Beads

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