不同溶剂和光源下十溴联苯醚光降解动力学研究

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摘要

利用气相色谱—质谱（GC—MS）和气相色谱（GC）研究了不同起始浓度、不同光源种类和功率、不同有机溶剂中十溴联苯醚（BDE-209）的光降解动力学。结果表明，在初始浓度、光源和溶剂条件下，BDE-209的光降解过程均符合一级动力学方程。同一光源和溶剂下，随着初始浓度的增大，BDE-209的光降解速率增快，半衰期变短；同一浓度和溶剂、不同光源下，BDE-209的光降解速率为500 W金卤灯＞300 W汞灯＞100 W汞灯＞500 W氙灯；同一浓度和光源下，BDE-209光降解速率为正己烷＞甲苯＞丙酮。此外，该实验在正己烷和丙酮混合溶液中发现了溴代苯并呋喃的生成，这说明BDE-209在不同配比的混合溶液中光降解可能产生高毒性的溴代二恶英类物质。

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	刘芃岩
	孟坛
	路佳良
	杨金新
	高兰

关键词 ：十溴联苯醚, 光降解, 溶剂, 光源, GC—MS

Abstract：

Photodegradation kinetics of decabromodiphenyl ether (BDE-209) was studied by gas chromatography - mass spectrometry (GC—MS) and gas chromatography (GC) under different initial concentrations，different light sources and power and solvents. The results show that the photodegradation of BDE-209 is in accord with the first-order kinetic equation under the initial concentration, light sources and solvents. The photodegradation rate of BDE-209 is faster and the half-life is shorter with the increase of initial concentration under the same light source and solvent; the photodegradation rate of BDE-209 is 500W metal halide lamp> 300 W mercury lamp> 100 W mercury lamp> 500 W xenon lamp under the same concentration，solvent and different light source; the photodegradation rate of BDE-209 is n-hexane> toluene> acetone under the same concentration and light source. In addition, the formation of bromobenzofuran was found in the mixed solution of n-hexane and acetone, which indicates that the photodegradation of BDE-209 in the mixed solution with different ratios could produce highly toxic brominated dioxins.

Key words： decabromodiphenyl ether photodegradation solvent light source GC—MS

作者简介: 刘芃岩（1964—），女，河北蠡县人，教授，博士。E-mail：hbupyliu@163.com

引用本文:

刘芃岩，孟坛，路佳良，杨金新，高兰. 不同溶剂和光源下十溴联苯醚光降解动力学研究[J]. 煤炭与化工, 2017, 40(2): 16-19,56. Liu Pengyan, Meng Tan, Lu Jialiang, Yang Jinxin, Gao Lan. Study on photodegradation kinetics of decabromodiphenyl ether under different solvents and light sources. CCI, 2017, 40(2): 16-19,56.

链接本文:

http://www.mtyhg.com.cn/CN/ 或 http://www.mtyhg.com.cn/CN/Y2017/V40/I2/16

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