Publications by authors named "A Hirmas-Olivares"
This study was conducted at Fildes Bay, King George Island, Antarctica, from November 30th, 2019, to January 30th, 2020. We determined the concentrations of Organochlorine Pesticides (OCPs) and Polychlorinated Biphenyls (PCBs) in phytoplankton, and zooplankton. The most abundant compounds found were hexachlorobenzene (HCB) in phytoplankton and γ-HCH in zooplankton.
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- The study examines the presence and exchange dynamics of organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs) in seawater and air at Fildes Bay, Antarctica, during a specific timeframe (Nov 2019 - Jan 2020).
- Hexachlorobenzene (HCB) was found to be the most prevalent compound, while PCB 11 was the most common PCB, with their concentrations being reported in both air and seawater.
- The research indicates that climate change—particularly glacier melting—may be redistributing these pollutants from the frozen environments, potentially transforming Antarctic regions into new sources of these harmful compounds due to altered biogeochemical cycles.
Persistent organic pollutants (POPs) are widespread worldwide, even reaching polar regions. Among POPs, dichlorodiphenyltrichloroethane (DDT) and their metabolites have been reported scarcely in the Antarctic environment. Here we report the levels of p,p'-DDT, o,p'-DDT, p,p'-DDE, and o,p'-DDE in air and water samples collected during austral summer 2009.
View Article and Find Full Text PDFIn the 1960s, the Quintero industrial complex was inaugurated in Chile. This began a history of dramatic anthropogenic impacts on the Chilean coast. Among the known, we could mention high atmospheric emissions of chemicals due to combustion processes and frequent oil spills.
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