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| Titel: |
Toxicological screening of chemical emissions from municipal solid waste landfills. application of a predictive framework to a state-of-the-art facility |
| Auteur: |
Manca, Dino Birmingham, Brendan Raha, Devbani |
| Verschenen in: |
Human and ecological risk assessment |
| Paginering: | Jaargang 3 (1997) nr. 2 pagina's 257-286 |
| Jaar: |
1997-05 |
| Inhoud: |
A screening-level risk assessment was used to identify chemicals of potential health concern emitted during the normal operation of an hypothetical state-of-the-art municipal solid waste landfill. Data on the amount of contaminants (carcinogens, non-carcinogenic systemic toxicants, odorous compounds, and particulate-bound metals) were obtained from existing facilities and used to estimate ground-level air concentrations of airborne chemicals at the point of maximum impact (property line) and at year 20 (year of maximum emissions from the landfill). Concentrations of leachate components present in the corresponding underlying aquifer were also estimated. Intakes of chemicals experienced by a series of human receptors were then computed using either single-media or multi-media algorithms. Carcinogens of concern were selected as those contributing to a lifetime excess cancer risk (LECR) greater than 10-6; for non-carcinogenic systemic toxicants and odorous volatiles an Exposure Ratio (ER=intake or concentration/RfD, RfC, odor threshold) greater than 0.1 was used as cut-off. The results obtained identified a final set of air emission components (n = 25) constituted mainly of carcinogenic and odorous substances whereas 2 leachate components were retained. Additional analysis using more refined risk-based approaches are necessary to verify the relevance of these projections. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 11 van 12 gevonden artikelen
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