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Seasonal changes in air organochlorine compound concentrations
Poster Title: Seasonal changes in air organochlorine compound concentrations
Submitted on 31 Mar 2017
Author(s): Snježana Herceg Romanić, Darija Klinčić
Affiliations: Institute for Medical Research and Occupational Health, Ksaverska c. 2, 10001 Zagreb, Croatia
This poster was presented at Ninth Croatian Scientific and Professional Assembly „Air Protection '15“, Poreč, Croatia, 2015
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Poster Information
Abstract: Polychlorinated biphenyls (PCBs) and organochlorine pesticides (OCPs) are persistent organic pollutants. Air is vulnerable to OCP pollution and plays a major role in their environmental distribution and fate. The aim of this work was to estimate organochlorine compound concentrations in air and determine seasonal changes in the pollution. Air samples (N=35) were collected within the period from June 28, 2007 to June 4, 2008 in Zagreb (northern part of town).
Among 209 PCB congeners, 6 indicator PCBs (PCB-28, PCB-52, PCB-101, PCB-138, PCB-153, PCB-180), 12 toxicologically relevant PCBs (PCB-77, PCB-126, PCB-169, PCB-105, PCB-114, PCB-118, PCB-123, PCB-156, PCB-157, PCB-167, PCB-189, PCB-170), and PCB-60 and PCB-74 were analysed. The following OCPs were also analysed: HCB, -, - and -HCH, p,p-DDE, p,p-DDD, and p,p-DDT. The details of the analytical method have been described in Herceg Romanić & Kožul (2009). The recovery of the method ranged between 63 and 99%, relative standard deviations between 7 and 20% (N=8). Limit of determination was between 0.02 and 0.2 pg/m3.
Compound concentrations ranged between 0.1 and 120.3 pg/m3. The concentration of an individual compound depended on air temperature.
All of the compounds exhibited seasonal variations with considerably higher concentrations in summer, except for HCB. Unlike other organochlorine compounds, HCB showed higher concentrations in winter. The reason for this could have been the inadequate incineration of chlorine-containing wastes. A pronounced seasonal trend for indicator PCB congeners and HCH isomers was observed. The temperature-dependent behaviour reaching maximum values in the summer supports the hypothesis that volatilisation does affect organochlorine levels in the air. Low-chlorinated PCBs largely contribute in indicator PCBs, and ɣ-HCH in HCH isomers.
Summary: The purpose of the study was to assess air pollution with organochlorine compounds in Zagreb and to determine seasonal variations of pollution.References: S. Herceg Romanić, D. Kožul, Organochlorine compound levels in ambient air over ten years, Sixth Croatian scientific and professional assembly: Air protection 2009, Zadar, Proceedings 323-328.Report abuse »
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