کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1387368 982576 2009 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Dynamics of controlled release of chlorpyrifos from swelling and eroding biopolymeric microspheres of calcium alginate and starch
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Dynamics of controlled release of chlorpyrifos from swelling and eroding biopolymeric microspheres of calcium alginate and starch
چکیده انگلیسی

In the present study biopolymer microspheres of sodium alginate and starch were prepared by employing CaCl2 as a crosslinker. A series of such microspheres of different compositions were prepared by varying the amounts of sodium alginate, starch and CaCl2 in the feed mixture. The prepared microspheres were loaded with an insecticide, chlorpyrifos, and both the native (unloaded) and loaded microspheres were characterized by FTIR and SEM techniques to gain insights into the structural and morphological features of the beads.The swelling experiments were performed for different compositions of beads at varying pH and temperature of the release medium. The swelling and erosion controlled release of insecticide was investigated for 8 days taking bidistilled water as a release medium. The release experiments were carried out under the static and varying experimental conditions and the data obtained were fitted to Ficks equation to evaluate diffusion co-efficient of insecticide. The results were further analyzed by Ficks power law equation, and the possible mechanisms of the insecticide release were suggested. In order to demonstrate the possible applicability of the present release system to natural agricultural fields the soil-pot experiments were designed and release profiles were studied.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Polymers - Volume 76, Issue 2, 17 March 2009, Pages 222–231
نویسندگان
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