Chitosan membranes of low and medium molecular weight as promising adsorbents of Cd (II) from aqueous solution

L.R. Ramos Berger; C.E. La Rotta Hernández; T.C. Montenegro Stamford; P. Mendes de Souza; L. de Oliveira Franco; G.M. de Campos-Takaki

Chitosan membranes of low and medium molecular weight as promising adsorbents of Cd (II) from aqueous solution

于Industrial, medical and environmental applications of microorganisms

著者：

L.R. Ramos Berger

L.R. Ramos Berger ¹Center of Biological Sciences, Federal University of Pernambuco, 50670-420, Recife, PE, Brazil; quelberger@hotmail.com
³Nucleus of Research of Environmental Sciences and Biotechnology, Catholic University of Pernambuco, 50050-900, Recife, PE, Brazil

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C.E. La Rotta Hernández

C.E. La Rotta Hernández ³Nucleus of Research of Environmental Sciences and Biotechnology, Catholic University of Pernambuco, 50050-900, Recife, PE, Brazil

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T.C. Montenegro Stamford

T.C. Montenegro Stamford ²Center of Health Sciences, University Federal of Pernambuco, 50670-420, Recife, PE, Brazil
³Nucleus of Research of Environmental Sciences and Biotechnology, Catholic University of Pernambuco, 50050-900, Recife, PE, Brazil

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P. Mendes de Souza

P. Mendes de Souza ³Nucleus of Research of Environmental Sciences and Biotechnology, Catholic University of Pernambuco, 50050-900, Recife, PE, Brazil

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L. de Oliveira Franco

L. de Oliveira Franco ⁴Department of Microbiology, Center for Biology Sciences, Federal Rural University of Pernambuco, 52171-900, Recife, PE, Brazil

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G.M. de Campos-Takaki

G.M. de Campos-Takaki ³Nucleus of Research of Environmental Sciences and Biotechnology, Catholic University of Pernambuco, 50050-900, Recife, PE, Brazil

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类型:: 章节

Page Range:: 70–75

DOI:: https://doi.org/10.3920/9789086867950_011

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Chitosan is a linear polysaccharide composed of randomly distributed β-(1-4)-linked D-glucosamine linked to N-acetyl-D-glucosamine moieties. Its cationic character confers special features and this is closely related to the metal removal availability. The aim of this study was to development chitosan membranes applied to the removal of Cd (II) from aqueous solutions. Suspensions of chitosan with low and medium molecular masses containing 1.0, 2.5 and 4.0% (w/v) were prepared in acetic acid 1% (v/v) by continuous overnight stirring at 25 °C. The obtained hydro-gels were casted using silicone molds and dried at 50 °C for 18 h. Chitosan membranes were put in contact with 20 mg/kg CdCl₂ solutions during 24 h at 25 °C. The Cd quantification was performed from calibration curves of Cd²+ in HCl 1.0 mol/l ranging 1.0 and 10.0 mg/kg throughout Anodic Stripping Voltammetry Analysis (ASVA) and square wave voltammetry (SWV). Removal values clearly showed a direct relationship between the increase of chitosan concentration and the molecular mass. Best cadmium removal values of 80% and 96% were obtained with membranes using low MW chitosan at 1.0% and medium MW chitosan at 4.0%, respectively.

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Industrial, medical and environmental applications of microorganisms

Current status and trends

ISBN:: 9789086867950

出版社:: Wageningen Academic

印刷出版日期:: 01 Nov 2014

Subjects
- Life Sciences

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Chitosan membranes of low and medium molecular weight as promising adsorbents of Cd (II) from aqueous solution

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Industrial, medical and environmental applications of microorganisms

Current status and trends

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