[Distribution character of organochlorinated pesticides in the karst cavity atmosphere from Guilin City, south China].
The investigation was performed on organochlorinated pesticides (OCPs) pollution in karst cavity atmosphere in Guilin City, South China. The total concentrations of OCPs outside the cave atmosphere ranged from 1.82 to 2.01 ng x m(-1), were far more than those of inside cave (range of 0.27-0.83 ng x m(-3)). OCPs concentrations fell gradually from cave gate to inside, especially to HCH, which reflected outside atmospheric transportation contributed most of pollutants inside cave. OCPs concentrations inside cave equaled to those in South and North poles therefore could be considered as background for OCPs research. The concentrations distribution sequence of HCH isomers corresponded to degradation rates themselves and that might provide critical information on the exhibiting their inherent character differences of HCH pesticides well under peculiarly original surrounding. In addition, a possibly fresh introduction of discofol-type and a historical usage potential for HCH pesticides in studied area were identified by isomer percentage combined isomer ratios.
Wang
Ying-hui
YH
School of Environment, Guangxi University, Nanning 530004, China. wangyinghui@glite.edu.cn
Qi
Shi-hua
SH
Li
Jie
J
Zhang
Jun-peng
JP
Yuan
Dao-xian
DX
D000393:Air Pollutants / Q000032:analysis*; D001272:Atmosphere; D002681:China; D004784:Environmental Monitoring; D006843:Hydrocarbons, Chlorinated / Q000032:analysis*; D010573:Pesticide Residues / Q000032:analysis*
D000393:Air Pollutants; D006843:Hydrocarbons, Chlorinated; D010573:Pesticide Residues