کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4409882 1307515 2012 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Conductive-diamond electrochemical oxidation of chlorpyrifos in wastewater and identification of its main degradation products by LC–TOFMS
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
Conductive-diamond electrochemical oxidation of chlorpyrifos in wastewater and identification of its main degradation products by LC–TOFMS
چکیده انگلیسی

The electrochemical transformation of the organophosphorous insecticide chlorpyrifos (CPF) was investigated in wastewater. The oxidation of CPF was carried out in a single-compartment electrochemical flow cell working under batch operation mode, using diamond-based material as anode and stainless steel as cathode. In order to evaluate its persistence and degradation pathway, two different concentration levels (1.0 mg L−1 and 0.1 mg L−1) were studied. Liquid chromatography/mass spectrometry was used for evaluation of the initial and electrolyzed solutions. The identification of CPF transformation products was performed by liquid chromatography–time of flight-mass spectrometry (LC–TOFMS). Results showed that CPF is completely removed at the end of treatment time. Analysis by LC–TOFMS allowed the identification of six degradation products (with Mw 154, 170, 197, 305 321 and 333). Three of the identified intermediates (Mw 170, 305 and 321) were completely removed at the end of electrolysis time. Interestingly, the formation of diethyl 3,5,6-trichloropyridin-2yl phosphate (chlorpyrifos oxon) and 3,5,6-trichloropyridin-2-ol was also found in previous reported degradation pathways using different degradation technologies.


► The electrochemical degradation of the insecticide chlorpyrifos was investigated in wastewater.
► Identification of degradation products was performed by liquid chromatography–time of flight-mass spectrometry (LC–TOFMS).
► Six degradation products (with Mw 154, 170, 197, 305 321 and 333) were identified.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemosphere - Volume 89, Issue 10, November 2012, Pages 1169–1176
نویسندگان
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