کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1885995 1533518 2015 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Pre-irradiation grafting of acrylonitrile onto chitin for adsorption of arsenic in water
ترجمه فارسی عنوان
پراکنش پیش آگهی آکریلو نیتریل بر روی کیتین برای جذب آرسنیک در آب
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم تشعشع
چکیده انگلیسی


• Partially deacetylated chitin was used for grafting AN by pre-irradiation.
• The maximal grafting degree of AN onto chitin was 114%.
• The cyano- of AN was converted into amidoxime to enhance adsorption.
• The adsorption capacity of As(III) onto modified chitin was 19.724 mg/g.
• Removal of arsenic in groundwater samples was tested by continuous adsorption.

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 γ-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 °C for 8 h. The mixture ratio of 0.1 N NH2OH·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.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Radiation Physics and Chemistry - Volume 106, January 2015, Pages 235–241
نویسندگان
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