Melting Himalayan glaciers contaminated by legacy atmospheric depositions are important sources of PCBs and high-molecular-weight PAHs for the Ganges floodplain during dry periods

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Publikace nespadá pod Filozofickou fakultu, ale pod Přírodovědeckou fakultu. Oficiální stránka publikace je na webu muni.cz.
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SHARMA Brij Mohan NIZZETTO Luca BHARAT Girija K. TAYAL Shresth MELYMUK Lisa Emily SÁŇKA Ondřej PŘIBYLOVÁ Petra AUDY Ondřej LARSSEN Thorjorn

Rok publikování 2015
Druh Článek v odborném periodiku
Časopis / Zdroj Environmental Pollution
Fakulta / Pracoviště MU

Přírodovědecká fakulta

Citace
www http://www.sciencedirect.com/science/article/pii/S0269749115300087
Doi http://dx.doi.org/10.1016/j.envpol.2015.08.012
Obor Znečištění a kontrola vody
Klíčová slova PCBs; PAHs; DDT; Glacier; India
Popis Melting glaciers are natural redistributors of legacy airborne pollutants, affecting exposure of pristine proglacial environments. Our data shows that melting Himalayan glaciers can be major contributors of polychlorinated biphenyls (PCBs) and high-molecular-weight polycyclic aromatic hydrocarbons (PAHs) for surface water in the Gangetic Plain during the dry season. Glacial emissions can exceed in some cases inputs from diffuse sources within the catchment. We analyzed air, deposition and river water in several sections along the Ganges River and its major headwaters. The predominant glacial origin of these contaminants in the Himalayan reach was demonstrated using air-water fugacity ratios and mass balance analysis. The proportion of meltwater emissions compared to pollutant discharge at downstream sections in the central part of the Gangetic Plain was between 2 and 200%. By remobilizing legacy pollutants from melting glaciers, climate change can enhance exposure levels over large and already heavily impacted regions of Northern India.
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