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Concentration and Influence Factors of Organochlorine Pesticides in Atmospheric Particles in a Coastal Island in Fujian, Southeast China

Category: Aerosol and Atmospheric Chemistry

Article In Press
DOI: 10.4209/aaqr.2018.04.0126
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Liping Jiao 1,2, Qibin Lao2,3,4, Liqi Chen 2, Fajin Chen4, Xia Sun2, Meixun Zhao1

  • 1 Key Laboratory of Marine Chemistry Theory and Technology (Ocean University of China), Ministry of Education; Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266100, China
  • 2 Key Laboratory of Global Change and Marine-Atmospheric Chemistry of State Oceanic Administration (SOA), Third Institute of Oceanography, SOA, Xiamen 361005, China
  • 3 Marine Environmental Monitoring Center of Beihai, SOA, Beihai 536000, China
  • 4 Guangdong Ocean University, Guangdong Province Key Laboratory for Coastal Ocean Variation and Disaster Prediction, Zhanjiang 524088, China

Highlights

Lower OCPs level was observed in the coastal island.
Seasonal OCP level influenced by meteorological conditions and TOC levels.
Stable carbon isotope was used to trace pollutant sources.
Higher OCPs levels mainly from polluted air mass of Northern China.


Abstract

Atmospheric particulate samples collected from Pingtan Island in Fujian province were analyzed for 20 organochlorine pesticides (OCPs) with the aims of elucidating the contamination levels and their influence factors, and providing more comprehensive and fundamental data for the risk assessment of OCPs in this coastal area. The concentration of total OCPs ranged from ND (not detected) to 27.25 pg m–3 (an average of 4.30 ± 4.07 pg m–3) and ND to 13.16 pg m–3 (an average of 3.11 ± 2.54 pg m–3) in 2006 and 2007 respectively, and the level are obviously lower than urban, industrial, suburban, and the similar research areas in the coastal areas of Europe. HCH (Hexachlorocyclohexane) and DDT (Dichlorodiphenyltrichloroethane) were the predominant contaminants, followed by Methoxychlor and Endrin, while the levels of Chlordane, Endosulfan, Aldrin and Dieldrin was relatively lower. Obvious seasonal variations in OCP levels correlate significantly with total particulate levels; higher concentrations of most OCP compounds appeared in winter, whereas lower concentrations appeared in summer. The distribution pattern of the level of most OCP compounds might be directly or indirectly influenced by meteorological conditions, and TOC (total organic carbon) is an important factor influencing the persistence of these OCPs in atmospheric particulates. The source of atmospheric particulates was traced by stable carbon isotopes, which indicate that the increased levels of OCPs in winter and spring influenced by the source of polluted air mass during the “heating season” of Northern China. The cancer risk probability was evaluated based on the residual levels of OCPs, and the results show that dermal contact was the primary pathway affecting human health, and the effect of OCP residuals in atmospheric particulates of the coastal area could not be neglected.

Keywords

Organochlorine pesticides Fujian coastal area Carbon stable isotope Atmospheric particulates Meteorological conditions


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