Ecological risk analysis using the vegetable Bioindicator Lolium multiflorum
Resumen
This work was starting from January, 2005 to March, 2008, during 39 months of monitoring. This evaluation was developed around of Petroleum Refinery area, in one fixed sample station localized in Esteio (29°49’16” S 51°08’09”) cities, Rio Grande do Sul state, Brazil. The objective of this work was to develop and apply a model Ecological Risk Analysis (ERA) to classify the risks related to the atmospheric emissions in industrial areas using the vegetable bioindicator Lolium multiflorum. The proposed model for the ecologic risk evaluation associates the information from stressors’ effects, which come from sulfur compounded gases emissions, at the receptors, that is, the vegetable bioindicator tissue. It was evaluated in the vegetable bioindicators parameter; sulfur concentration accumulated in the plants, classified in the study as “answers data”. These were linked to the SO2 atmosphere concentration, which generate the “consequence data”; Toxic Potential Unit (TPU) and Exposure Toxic Unit (ETU). The integration was made using the statistics correspondence multiple variable analysis that demonstrate indications of risks for the vegetation localized around the refinery, when it was exposed an TPU higher than the unit.
Key words: atmospheric pollution, biomonitoring, Lolium multiflorum, risk assessment, sulphur.
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