Pre-irradiation grafting of acrylonitrile onto chitin for adsorption of arsenic in water
http://repository.vnu.edu.vn/handle/VNU_123/32256
Radiation-induced grafting is an effective technique for preparation of novel materials. In this study, partially deacetylated chitin with deacetylation degree (DDA) of about 40% was graft-copolymerized with acrylonitrile (AN) by a gamma-ray pre-irradiation method.
The maximal grafting degree of AN onto pre-irradiated chitin at 25 +/- 1.2 kGy was 114% for AN concentration in dimethylformamide of 40% (v/v) at 70 degrees C for 8 h.
The mixture ratio of 0.1 N NH2OH center dot HCl to 0.1 N NaOH was selected to be 7:3 (v/v) for amidoxime conversion of cyano-groups on grafted chitin (Chi-g-AN).
The characteristics of modified chitin were depicted by the FT-IR spectra, BET area and SEM images. Adsorption equilibrium of As(III) onto Chi-g-AN converted amidoxime (Chi-g-AN-C) fits with the Langmuir model and the maximal adsorption capacity was 19.724 mg/g.
The break-through times of As(III) on Chi-g-AN-C in column adsorption experiments increased with the increase in bed depths.
Radiation-induced grafting is an effective technique for preparation of novel materials. In this study, partially deacetylated chitin with deacetylation degree (DDA) of about 40% was graft-copolymerized with acrylonitrile (AN) by a gamma-ray pre-irradiation method.
The maximal grafting degree of AN onto pre-irradiated chitin at 25 +/- 1.2 kGy was 114% for AN concentration in dimethylformamide of 40% (v/v) at 70 degrees C for 8 h.
The mixture ratio of 0.1 N NH2OH center dot HCl to 0.1 N NaOH was selected to be 7:3 (v/v) for amidoxime conversion of cyano-groups on grafted chitin (Chi-g-AN).
The characteristics of modified chitin were depicted by the FT-IR spectra, BET area and SEM images. Adsorption equilibrium of As(III) onto Chi-g-AN converted amidoxime (Chi-g-AN-C) fits with the Langmuir model and the maximal adsorption capacity was 19.724 mg/g.
The break-through times of As(III) on Chi-g-AN-C in column adsorption experiments increased with the increase in bed depths.
| Title: | Pre-irradiation grafting of acrylonitrile onto chitin for adsorption of arsenic in water |
| Authors: | Truong, Thi Hanh Ha, Thuc Huy Nguyen, Quoc Hien |
| Keywords: | Chitin Grafting Acrylonitrile Arsenite Pre-irradiation |
| Issue Date: | 2015 |
| Publisher: | PERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND |
| Citation: | ISIKNOWLEDGE |
| Abstract: | Radiation-induced grafting is an effective technique for preparation of novel materials. In this study, partially deacetylated chitin with deacetylation degree (DDA) of about 40% was graft-copolymerized with acrylonitrile (AN) by a gamma-ray pre-irradiation method. The maximal grafting degree of AN onto pre-irradiated chitin at 25 +/- 1.2 kGy was 114% for AN concentration in dimethylformamide of 40% (v/v) at 70 degrees C for 8 h. The mixture ratio of 0.1 N NH2OH center dot HCl to 0.1 N NaOH was selected to be 7:3 (v/v) for amidoxime conversion of cyano-groups on grafted chitin (Chi-g-AN). The characteristics of modified chitin were depicted by the FT-IR spectra, BET area and SEM images. Adsorption equilibrium of As(III) onto Chi-g-AN converted amidoxime (Chi-g-AN-C) fits with the Langmuir model and the maximal adsorption capacity was 19.724 mg/g. The break-through times of As(III) on Chi-g-AN-C in column adsorption experiments increased with the increase in bed depths. (C) 2014 Elsevier Ltd. All rights reserved. |
| Description: | RADIATION PHYSICS AND CHEMISTRY Volume: 106 Pages: 235-241 Published: JAN 2015 ; TNS05835 |
| URI: | http://repository.vnu.edu.vn/handle/VNU_123/32256 |
| ISSN: | 0969-806X |
| Appears in Collections: | Bài báo của ĐHQGHN trong Web of Science |
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