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Titolo:
Study of photochemical oxidation of standard chlorinated paraffins and identification of degradation products
Autore:
Koh, IO; Thiemann, W;
Indirizzi:
Univ Bremen, Dept Phys & Environm Chem, D-28334 Bremen, Germany Univ Bremen Bremen Germany D-28334 nvironm Chem, D-28334 Bremen, Germany
Titolo Testata:
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
fascicolo: 2-3, volume: 139, anno: 2001,
pagine: 205 - 215
SICI:
1010-6030(20010316)139:2-3<205:SOPOOS>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
ENVIRONMENTAL-SAMPLES; BIOLOGICAL SAMPLES; MASS-SPECTROMETRY; ORGANIC-COMPOUNDS; ION; MS;
Keywords:
chlorinated paraffins; photooxidation; intermediate products; ion chromatography; GC/MS; biological toxicity test;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
35
Recensione:
Indirizzi per estratti:
Indirizzo: Koh, IO Univ Bremen, Dept Phys & Environm Chem, POB 33 04 40, D-28334 Bremen, Germany Univ Bremen POB 33 04 40 Bremen Germany D-28334 4 Bremen, Germany
Citazione:
I.O. Koh e W. Thiemann, "Study of photochemical oxidation of standard chlorinated paraffins and identification of degradation products", J PHOTOCH A, 139(2-3), 2001, pp. 205-215

Abstract

The kinetics of the photolytical oxidation of standard chlorinated paraffins by a combination of ultraviolet light and hydrogen peroxide was studied in various diluted aqueous solution. The most efficient degradation of the chlorinated paraffins was found in a 0.1% acetone-water medium in the series of experiments (aqueous solution with H2O2 or without H2O2 addition). Thehalf-lives of Hordalub 500 and Hordaflex LC 50 in 0.1% acetone aqueous phase were less than 1 h (t(1/2) < 1 h), other chlorinated paraffins (CP 30, CP 40, CP 52 and CP 56) ranged between 2.5 and 5.2 h. Free chloride was determined as a function of progressing degradation. Long-chain alkanes were identified as degradation products of short-chain chlorinated paraffins. The ecotoxicity tests investigated showed that in the green algae test for chlorinated paraffins, no inhibition of cell growth was observed. By means of biological tests of chlorinated paraffins, a significant acute toxicity for Daphnia as well as a chronic toxicity for luminescent bacteria were determined. (C) 2001 Elsevier Science B.V. All rights reserved.

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Documento generato il 31/03/20 alle ore 05:05:10