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Antimony removal from water by a chitosan-Iron(III)[ChiFer(III)] biocomposite

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Lapo, Byron
Demey Cedeño, Hary
Carchi, Tany
Sastre Requena, Ana MaríaMés informacióMés informacióMés informació
Document typeArticle
Defense date2019-02-01
PublisherMultidisciplinary Digital Publishing Institute (MDPI)
Rights accessOpen Access
Attribution-NonCommercial-NoDerivs 3.0 Spain
Except where otherwise noted, content on this work is licensed under a Creative Commons license : Attribution-NonCommercial-NoDerivs 3.0 Spain
Abstract
The presence of antimony(III) in water represents a worldwide concern, mainly due to its high toxicity and carcinogenicity potential. It can be separated from water by the use of sustainable biopolymers such as chitosan or its derivatives. The present study applied chitosan modified with iron(III) beads to Sb(III) removal from aqueous solutions. The resulting material performed with a high adsorption capacity of 98.68 mg/g. Material characterization consisted of Raman spectroscopy (RS), X-ray diffraction (XRD), scanning electron microscope observations (SEM-EDX), Fourier transform infrared spectroscopy (FTIR) and point of zero charge (pHpzc). The adsorption study included pH study, effect of initial concentration, kinetics, ion effect, and reusability assessment. The RS, XRD, and FTIR results indicated that the main functional groups in the composite were related to hydroxyl and amino groups, and iron oxyhydroxide species of a-FeO(OH). The pHpzc was found to be 7.41. The best adsorption efficiency was set at pH 6. The equilibrium isotherms were better fitted with a non-linear Langmuir model, and the kinetics data were fitted with a pseudo-second order rate equation. The incorporation of iron into the chitosan matrix improved the Sb(III) uptake by 47.9%, compared with neat chitosan (CS). The material did not exhibit an impact in its performance in the presence of other ions, and it could be reused for up to three adsorption–desorption cycles
CitationLapo, B. [et al.]. Antimony removal from water by a chitosan-Iron(III)[ChiFer(III)] biocomposite. "Polymers", 1 Febrer 2019, vol. 11, núm. 2, p. 351-1-351-14. 
URIhttp://hdl.handle.net/2117/131143
DOI10.3390/polym11020351
ISSN2073-4360
Publisher versionhttps://www.mdpi.com/2073-4360/11/2/351
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  • R2EM - Resource Recovery and Environmental Management - Articles de revista [155]
  • Departament d'Enginyeria Química - Articles de revista [1.992]
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