Photoconversion of Hexachlorobenzene in Water, Ice and Organic Phase

doi:10.7503/cjcu20120974

Abstract

Abstract:

The photoconversion kinetics of hexachlorobenzene(HCB) was studied under UV irradiation by using low-pressure mercury lamp as light source. The photoproducts were analyzed and on this basis the photoconversion mechanism was proposed. Also, the effects of H₂O₂, NO₂^-, Fe²⁺ on the photoconversion in water/ice were investigated, respectively. The results show that the photoconversion rates of HCB in the three systems under the irradiation changed as follows: organic phase>water>ice; H₂O₂ promotes the photoconversion of HCB in water but inhibits it in ice; NO₂^- has inhibition effect on the photoconversion of HCB both in water and in ice; Fe²⁺ promotes the photoconversion of HCB in water but has no effect in ice; the photoconversion mechanism of HCB is a step-by-step dechlorination process.

Key words: Hexachlorobenzene, Photoconversion, Reaction medium, Kinetics, Reaction mechanism

CLC Number:

O644.1
X131

TrendMD:

LIU Han-Fei, YANG Ting, KANG Chun-Li, LI Lin-Lin, LI Zhe, LIU Jia, CHEN Bai-Yan. Photoconversion of Hexachlorobenzene in Water, Ice and Organic Phase[J]. Chem. J. Chinese Universities, 2013, 34(8): 1971.

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Photoconversion of Hexachlorobenzene in Water, Ice and Organic Phase

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