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Environmental Sciences Seminar Series

People, plastics and pollutants: Passive sampling of POPs in the Great Lakes (and beyond)

Prof. Rainer Lohmann

Professor of Oceanography Director URI Superfund Research Center 'STEEP' Fellow, HanseWissenschaftsKolleg

Sala d'actes IDAEA-CSIC

22 març de 2018, a les  12:00 h.

 

Abstract


Polyethylene passive samplers were

simultaneously deployed in surface water and near surface atmosphere to assess

sources, spatial trends and air-water exchange of organic pollutants in the

Great Lakes region 2011-2014. Passive samplers were chosen to obtain a large

spatial coverage of sites, and directly measure the fraction of pollutants

available for cycling between media. Legacy

pollutants were - by and large - volatilizing

from the water; hence the lower Great Lakes acted as a secondary source to the

atmosphere.

Yet in most cases, on-going sources affected spatial trends of emerging and

emerged organic pollutants in the Great Lakes region. Spatial

distributions of freely dissolved organic pollutants in Lakes Erie and Ontario

were influenced by loadings from contaminated sites and water circulation

patterns. The Niagara River and contaminated sites were identified as important

sources of contamination in the lower Great Lakes. Future work will focus on

proof-of-principle studies using passive samplers in the waters of the world

(AQUA-GAPS) and characterizing the uptake of ionic chemicals by passive samplers.


Esteu tots convidats


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