期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 652, 期 -, 页码 163-176出版社
ELSEVIER
DOI: 10.1016/j.scitotenv.2018.10.230
关键词
PM10; OCPs; Spatial distribution; Seasonal variations; PSCF analysis; Cancer risk assessment
资金
- National Natural Science Foundation of China [41390240]
- Science and Technology Basic Special Fund [2013FY111100-04]
- National Basic Research Program of China [2014CB441101]
Concentrations, composition and seasonal variations of organochlorine pesticides (OCPs) in the atmosphere (particulate phase and gaseous phase) at coastal cities in northern China were determined. OCP transport from emission source areas and lifetime excess cancer risks by inhalation exposure to specific OCPs were also investigated. The annual average concentration of total OCPs in gaseous phase ranged from 1.0 ng/m(3) to 6.3 ng/m(3), with the peak observed in summer at most sites. Particulate phase concentrations ranged from 29.9 pg/m(3) to 103.3 pg/m(3), with the maximum found in the local heating period at most locations. The detection rates of gaseous samples were considerably higher than those of particulate ones. The dominant components included endosulfan (I and II), (alpha- and gamma-) chlordane, pentachlorobiphenyl (PeCB), hexachlorobenzene (HCB), heptachlor, (alpha-, beta- and gamma-) hexachlorocyclohexane (HCH), dichloro-diphenyl-trichloroethane (DDT) and their metabolic products. The specific ratios indicated different applications of DDT, technical HCH and endosulfan at most sites. Large differences in compositional profiles occurred in January (typical heating period) and July (representative non-heating period), and diurnal changes in component concentrations may have been influenced by local emission pattern. The potential source contribution function (PSCF) manifested seasonal concentrations of airborne OCPs affected by the input of potential sources in different regions. The emission sources with higher contribution probabilities to the sites were primarily distributed in the surrounding areas. The lifetime excess cancer risks for the local residents by inhalation exposure to specific components were not high, though the potential threat of alpha-HCH and HCB should be concerned. Capsule: Gaseous OCPs reached peak values in summer and dominated relative to particulate (PM10) values; meanwhile, surrounding sources affected air OCP concentrations, and cancer risks of OCPs by inhalation exposure were not high. (C) 2018 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据