Decomposition of dihaloacetonitriles in water solutions and fortified drinking water samples

被引：66

作者：

Nikolaou, AD ^{[1
]}

Golfinopoulos, SK ^{[1
]}

Kostopoulou, MN ^{[1
]}

Lekkas, TD ^{[1
]}

机构：

[1] Univ Aegean, Dept Environm Studies, Mytilene, Greece

来源：

CHEMOSPHERE | 2000年 / 41卷 / 08期

关键词：

dihaloacetonitriles; dichloroacetonitrile; bromochloroacetonitrile; dibromoacetonitrile;

D O I：

10.1016/S0045-6535(00)00025-4

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

An investigation of the decomposition of dihaloacetonitriles (DHANs) in water solutions and fortified drinking water samples was conducted. The concentrations of dichloroacetonitrile (CHCl2CN, DCAN), bromochloroacetonitrile (CHBrClCN, BCAN) and dibromoacetonitrile (CHBr2CN, DBAN) were determined by a gas chromatography-mass spectrometry (GC-MS) method at regular time intervals and different temperatures. The effect of sodium thiosulfate (Na2S2O3), which is used as a preservative in water samples, was also examined. The rates of decomposition were determined for each compound. The results show that the reactions are faster in fortified drinking water samples than in ultrapure water solutions. They are also favored at higher temperature, especially when sodium thiosulfate is present. The highest decomposition rate is shown by DCAN, followed by BCAN and DBAN, while at the presence of sodium thiosulfate the decomposition of DBAN is the fastest. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：1149 / 1154

页数：6

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