title: [Distribution character of organochlorinated pesticides in the karst cavity atmosphere from Guilin City, south China].
abstract: 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.
authors.affiliation: School of Environment, Guangxi University, Nanning 530004, China. wangyinghui@glite.edu.cn
authors.forename: Ying-hui
authors.initials: YH
authors.lastname: Wang
authors.forename: Shi-hua
authors.initials: SH
authors.lastname: Qi
authors.forename: Jie
authors.initials: J
authors.lastname: Li
authors.forename: Jun-peng
authors.initials: JP
authors.lastname: Zhang
authors.forename: Dao-xian
authors.initials: DX
authors.lastname: Yuan
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D001272:Atmosphere; D002681:China; D004784:Environmental Monitoring; D006843:Hydrocarbons, Chlorinated / Q000032:analysis*; D010573:Pesticide Residues / Q000032:analysis*
chemical_list: D000393:Air Pollutants; D006843:Hydrocarbons, Chlorinated; D010573:Pesticide Residues