The Source Analytical Of Concentration Of Endosulfan In The Atmosphere In Dalian Areas Based On The Concentration Field Method

Endosulfan is a kind of synthetic organochlorine compound, widely served as agricultural pesticide. It is persistent in the environment, deeply bioaccumulative and has remote environment remove ability. It is almost toxic to all kinds of organisms. The pesticide will be eliminated in global scope in April2011because it is a threat to human health and environment.Dalian lies in the south of Liaodong Peninsula, Fruit crop cultivation is a very important agricultural activity in Dalian which is the second biggest production base so endosulfan is widely used. According to monitoring result, the annual average concentration of endosulfan is208.08pg/m3in Jinzhou state,302.84pg/m3in Pulandian state,386.20pg/m3in Zhuanhe state. Endosulfan pollution is more serious in these three states and the annual average concentration of endosulfan is139.51pg/m3in Dalian downtown,70.53pg/m3in Wafangdian.Every country scholars extensively use HYSPLIT (Hybrid single-particle lagrangian integrated trajectory model) to research transmission process of boundary layer atmosphere pollution air mass at present, what’s more, visualization of air masses remove and their probable influence trajectory analysis to contaminate concentration have been evaluated by statistical methods. Potential source contribution function(PSCF) and an improved method of which is concentration field or trajectory statistical method. Concentraton field method is consisted of concentraion values which of setting air masses reverse trajectory at acceptance points.An average concentraton or logarithmic average concentration is calculated in gridding of every spatial domain by using weight of the time of air mass passing through gridding, and application of grid group through the atmosphere time this weight factors to conversion. Calculated from the high density, indicates that there is air pollutants carried through.According to the concentration field method for the logarithm of average concentration may conclude that the gas of the monitoring of the interaction between situation. Can draw the conclusion that in five sampling sites, Dalian and Pulandian air monitoring stations for character may be the source of endosulfan; Wafangdian and Jinzhou, for PuLlandian Zhuanghe is the source.