Pollution Characteristics And Health Risk Assessment Of Atmospheric Halogenated Hydrocarbons In The Downtown Area Of Hefei, China

The volatile halogenated hydrocarbons include methyl chloride,a chloride,epichlorohydrin,chlorobutane,vinyl chloride,allyl chloride and so on.It has a great influence to the natural environment and human living environment which can generate secondary pollution of organic pollutants and aerosols,with strong photochemical reactivity in the atmosphere.Many domestic institutions have already begun to do a series of the volatile halogenated hydrocarbons research on changes,sources and so on nearly.However,the limitis for the majority of the volatile halogenated hydrocarbons concentrations have not yet been set in the domestic,and it is lack of theoretical analysis about the changing features and changing rules of the volatile halogenated hydrocarbons in the environment,besides,it is little about the changing features of the volatile halogenated hydrocarbons in haze days from now on.Therefore,This experiment start the research from the following launches,provides the theory basis for the changes of the volatile halogenated hydrocarbons in Hefei,riched the volatile halogenated hydrocarbons information database of Hefei,give some reference to the regulation of urban residents travel and pollutants.Select the city main road,transportation hub area,Forest Park area,tire industrial zone and automotive industrial zone as the conventional sampling points,we use SuMa tank to collect the samples on different locations,Nutech3550 atmospheric preconcentration device and GC/MS to analysis of the sample in different locations.we study the diurnal variation and highly variation of in haze weather.This paper is also do health risk assessment about the main volatile halogenated hydrocarbons in the city main road,transportation hub area,Forest Park area,tire industrial zone and automobile industrial zone.The experimental results show:the main halogenated hydrocarbon in vehicle exhaust in Hefei City are hextrichloroethane,dichloromethane,dichloropropene and dichloroethane;the main component of the city main road of high temperature period of halogenated hydrocarbons are dichloromethane,dichloroethane,tetrachloroethane and dichloropropene;the main component of transportation hub area of high temperature time of halogenated hydrocarbons are temperature time of halogenated hydrocarbons are dichloromethane,dichlorobenzene,tetrachloroethane and dichloroethane;the main component of the Forest Park area at the low temperature of halogenated hydrocarbons are dichloromethane,dichlorobenzene,dichloropropene and dichloroethane;the main component of the tire industrial zone of the high temperature period of halogenated hydrocarbons are dichloromethane,dichlorobenzene,tetrachloroethane and dichloroethane;the main component of automobile industrial zone of the high temperature period of halogenated hydrocarbons are dichloromethane,dichloroethane,tetrachloroethane and dichloropropene.