Photolytic degradation of N,N-diethyl-m-toluamide in ice and water: Implications in its environmental fate

被引：13
作者：
Calza, P. [1 ]
Medana, C. [2 ]
Sarro, M. [1 ]
Baiocchi, C. [2 ]
Minero, C. [1 ]
机构：
[1] Univ Turin, Dipartimento Chim, I-10125 Turin, Italy
[2] Univ Turin, Dipartimento Biotecnol Mol & Sci Salute, I-10125 Turin, Italy
来源：
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 2013年 / 271卷
关键词：
DEET; Ice; Photolysis; HRMS; Transformation products; PERSONAL CARE PRODUCTS; ORGANIC-MOLECULES; SNOW; DEET; POLLUTANTS; CHEMISTRY; RISK; TRANSFORMATIONS; PHOTOCHEMISTRY; HYDROCARBONS;
D O I：
10.1016/j.jphotochem.2013.08.001
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The photochemical transformation of N,N-diethyl-m-toluamide (DEET), one of the most widespread and efficient mosquito repellents, has been investigated. Initially, photoinduced DEET degradation was investigated in liquid samples, at 20 degrees C and 0 degrees C, and in ice (-15 degrees C), aimed to simulate all possible photoinduced processes occurring in water and in cold environments. Under UV-illumination, DEET degradation was more efficient in ice than in water. The evaluation of transformation products (TPs) formed during the photolysis in solution and in ice evidences mostly the same degradation products, but with different concentration ratio and some peculiar differences. An hypothesis about what kind of processes may play a role is reported. In solution, the oxidative process mostly involved were (poly)hydroxylation or oxidation of the hydroxyl groups, while in ice N-dealkylation and monohydroxylation prevail. Finally, DEET and its TPs were searched out in snow and river water in wintertime. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码：99 / 104
页数：6
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