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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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

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	Articles by authors
	Liu Pengyan
	Meng Tan
	Lu Jialiang
	Yang Jinxin
	Gao Lan

Cite this article:

Liu Pengyan,Meng Tan,Lu Jialiang等. Study on photodegradation kinetics of decabromodiphenyl ether under different solvents and light sources[J]. CCI, 2017, 40(2): 16-19,56.

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http://www.mtyhg.com.cn/EN/ OR http://www.mtyhg.com.cn/EN/Y2017/V40/I2/16

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