紫外光助类Fenton氧化法催化1,2-二氟-1,1,2,2-四氯乙烷脱氟反应的研究  

Defluorination reaction of 1,2-difluoro-1,1,2,2-tetrachloroethane catalyzed by UV light-assisted Fenton method

作　　者：邱贞龙[1] 李立 丁利群 孟昭福[3] 闫晓艺[1] 孟祥至[1] 赵君楠[1] 

机构地区：[1]西北农林科技大学理学院,陕西杨凌712100 [2]陕西延长石油集团氟硅化工有限公司,陕西西安710075 [3]西北农林科技大学资源环境学院,陕西杨凌712100

出　　处：《西北农林科技大学学报（自然科学版）》2013年第1期103-108,共6页Journal of Northwest A&F University(Natural Science Edition)

基　　金：陕西杨凌现代农业研究项目;陕西延长石油(集团)有限责任公司科研攻关项目(ycsy2011ky-B-52)

摘　　要：【目的】针对1,2-二氟-1,1,2,2-四氯乙烷(F112)具有高能量碳氟键,很难被光解、水解及微生物降解的特点,研究紫外光条件下类Fenton氧化法催化F112脱氟的最佳条件,旨在为含氟有机物的降解提供参考。【方法】在紫外线高压汞灯的作用下,以类Fenton氧化法中的Fe3+/H2O2为催化剂,研究溶液初始pH、Fe3+投加量、H2O2投加量、反应温度、紫外光源与溶液距离对F112脱氟率的影响。【结果】在溶液初始pH=1、Fe3+投加量为7.5mmol/L、H2O2投加量为500mmol/L、反应温度40℃、紫外光源与液面距离为12cm的条件下,F112脱氟率均最大,脱氟效果均最佳。【结论】得到了紫外光条件下类Fenton氧化法催化F112脱氟的最佳条件,为含氟有机物的降低提供了参考。[Objective] As the high-energy carbon-fluorine bond in 1,2-difluoro-1,1,2,2-tetrachloro- ethane （F112） is extremely difficult be degraded by photolysis, hydrolysis, or biodegradation, this study un- der UV light Fenton oxidation catalysis aimed to attain the best F112 defluorination conditions. [Method] In this paper,defluorination of F112 was conducted using Fe3＋/H2O2 of Fenton oxidation as catalyst with the presence of ultraviolet high-pressure mercury lamp. The effects of initial pH,amount of Fe3＋, H2O2 added,reaction temperature,distance from the UV light sources to F112 defluorination rates were studied. [Result] Results shows that best F112 defluorination rate was obtained with initial pH= 1 ,Fe3＋ added 7.5 mmol/L, H2O2 added 500 mmol/L, temperature= 40 ℃, and the distance of reaction surface to light source = 12 cm. [Conclusion] The experiment obtained the best conditions under UV light Fenton oxidation catal- ysis for F112 photocatalytic defluorination.

关 键 词：紫外光 类Fenton氧化法 FE3+ H 2O2 脱氟率 1 2-二氟-1 1 2 2-四氯乙烷 

分 类 号：X78[环境科学与工程—环境工程]