Influence,of,dust,emission,on,Xian,atmospheric,organochlorine,pesticide,pollution emission什么意思

　　Abstract: The four north-central Shaanxi OCPs observed surface concentration of farmland were analyzed via GC-MS and GC/ECD, respectively. Xi""an observation area 6.110 ng·g-1, Tongchuan observation area 0.817 ng·g-1, Yan""an observation area 3.018 ng·g-1, an observation area in Yulin 5.286 ng·g-1, respectively . Be observed over the same period in Xi""an concentration of OCPs in air 325.773 pg·m-3, where the concentration of particles OCPs 160.883 pg·m-3, the concentration of gaseous OCPs 164.890 pg·m-3.Xi""an urban air particles and gas field surface soil OCPs and the OCPs was correspondence between the basic components of content, indicating that much of Xi""an OCPs in the air of dust released from the soil. The results show that the observation area at the same time with different content of each component of different OCPs, DDTs maximum concentration, mainly in the form of p, p""-DDT, BHC, followed by HCHs, mainly in the form of β-HCH; air, gaseous and OCPs There are two forms of particulate, HCHs gas content was significantly greater than the particulate phase, DDTs substances content of particles greater than the gas content; OCPs in soil content and the physical nature of the soil, HCB, Chlordane, TN + CN and soil organic matter Content showed a significant positive correlation, chlordane, endosulfan, EnSO4 and soil acidity was a significant positive correlation, HCHs, DDTs and soil acidity were some negative.
　　Key words: dust emission; organochlorine pesticide; Xi""an urban air; four observed areas