Qingdao Atmospheric Organochlorine Pesticides, Pcbs And ~ 7be Simultaneous Observation And Time Change The Law

Qingdao is a Coastal city which has a continental monsoon climate.This study of detecting organochlorine pesticides and PCBs in atmospheric TSPs of Qingdao had been on for one year, and also made an preliminary deduce for the temporal change of OCPs and PCBs.By analysing result of detecting the content of HCHs, DDTs and PCBs in Qingdao's atmospheric TSPs. POPs content may follow a trends of being less in summer and more in winter. The content of each kind of POPs may be in difference in different day,the average content of the HCHs, DDTs and PCBs in a whole year were 18.4%,27.8% and 53.8%, which is mainly composed by PCBs. HCHs, DDTs and PCBs may follow the same seasonal pattern, which generally increases or decrease at the same time. but the percentage of increase or decrease is not fixed. The content change of POPs in atmospheric TSPs has a directly relation with certain meteorological conditions, such as precipitation, wind direction, and their impact is more obvious.On the contrary,the impact of other meteorological conditions such as tempreture is not so obvious.The average content of Be in Qingdao atmosphere TSP is higher than the world average standard (3.5 mBq/m3), which is 6.88±0.40mBq/m3 for Qingdao.The peak happes in April,2010,and the minimum comes out in July,2009,the content flows in the range of 1.52～14.58 mBq/m3.The result proves the theory of "Spring leaks".The factor which can affect the content of 7Be in TSP conclude latitude effect,atmosphere tranfer,atmosphere cleaning rate and so on.The content variation of 7Be and POPs is affected by many factors such as temperature,raining and wind direction,and the main factors which play the most important part is raining.