The recent deposition of persistent organic pollutants and mercury to the Dasuopu glacier, Mt. Xixiabangma, central Himalayas
作者： Xiao-ping Wang , Tan-dong Yao , Peng-ling Wang , Wei-Yang , Li-de Tian
DOI: 10.1016/J.SCITOTENV.2008.01.016
关键词:
摘要: Abstract High mountains may serve as condensers for persistent organic pollutants (POPs) and the ice/snow core can provide long-term records of atmospheric deposition pollutants. In this study, organochlorine pesticides (OCPs) polycyclic aromatic hydrocarbons (PAHs) in firn from Dasuopu Glacier were analyzed seasonal variation flux these investigated. PCB 28 was always detected samples different layers concentrations range 0.09–0.3 ng/l. Hexachlorobenzene (HCB) total DDTs (p-p'-DDD p-p'-DDT) not only present some samples. No p-p'-DDE hexachlorocyclohexane (HCH) above level determination limits. Concentrations HCB ranged 0.04 to 0.07 ng/l, 0.15–0.3 ng/l. Total glacier PAHs below 26 ng/l. The levels OCPs roughly similar values European mountain areas but lower than those Lys (Italy) Rocky Mountain. Hg concentration (2–35 ng/l) higher that remote region Arctic. didn't show obvious seasons, however major PAH compounds observed summer winter. With regard Hg, it displayed winter maximum. Deposition OCPs, mercury showed results with maximum occurring 2000s. After 2000/2001, decreased reflected possible decrease emissions adjacent region.
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