کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
29162 44127 2008 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Using photoactivated periodate to decompose TOC from hydrolysates of chemical warfare agents
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی بیو مهندسی (مهندسی زیستی)
پیش نمایش صفحه اول مقاله
Using photoactivated periodate to decompose TOC from hydrolysates of chemical warfare agents
چکیده انگلیسی

Photoactivated periodate was investigated for the disposal of hydrolysates of chemical warfare agents (HCWAs) when hydrolysis is used as the first step in disposal of chemical warfare agents (CWAs). The kinetics and mechanisms of total organic carbon (TOC) loss by photoactivated periodate oxidation of the HCWAs, thiodiglycol (TDG), 3,3-dithiopropanol (TDP), and 1,4-thioxane (TX), were investigated at pH 3, 7, and 10. At pH 3, TDG had the fastest rate of TOC loss followed by TDP and TX. Less TOC loss at pH 7 compared to pH 3 was attributed to ozone decomposition reactions and OH quenching by mineralization products (e.g., bicarbonate) at pH 7. At pH 10, compared to pH 7, TX had more TOC loss, but TDG and TDP exhibited similar TOC loss as pH 7 conditions. In all experiments, TOC loss ceased when periodate was depleted. Solution conditions such as pH, initial ratio of periodate to HCWA, nitrogen purging, and consecutive additions of periodate were investigated to explore the role of reactive species in TOC loss and to determine optimal periodate mineralization conditions for HCWAs. In all cases consecutive additions of periodate provided the most TOC loss but the conditions for the most efficient use of periodate was different for each HCWA.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 194, Issues 2–3, 20 February 2008, Pages 212–219
نویسندگان
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