Site-specific risk assessment in contaminated vegetable gardens

• Published in: Chemosphere (Oxford) Vol. 71; no. 7; pp. 1301 - 1307
• Main Authors: Sipter, Emese, Rózsa, Enikő, Gruiz, Katalin, Tátrai, Erzsébet, Morvai, Veronika
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.04.2008; Elsevier
• Subjects: Abandoned metal mine; Agriculture; Animal, plant and microbial ecology; Applied ecology; Arsenic - analysis; Biological and medical sciences; Ecotoxicology, biological effects of pollution; Food Contamination - analysis; Fundamental and applied biological sciences. Psychology; General aspects; Heavy metals; Human health risk; Hungary; Metals, Heavy - analysis; Mining; Risk Assessment; Soil Pollutants - analysis; Soil pollution; Terrestrial environment, soil, air; Vegetables - chemistry; Vegetables - growth & development; Vegetables - standards; Hungary; Human health risk; Soil pollution; Heavy metals; Abandoned metal mine; Human; Garden; Edible species; Trophic relation; Risk analysis; Heavy metal; Trophic chain; Pollutant; Health and environment; Industrial wasteland; Old mine; Risk assessment; Health hazards; Public health
• ISSN: 0045-6535; 1879-1298
• DOI: 10.1016/j.chemosphere.2007.11.039

A field survey was carried on in Gyöngyösoroszi, Hungary, near to an abandoned lead/zinc mine to analyse the metal contamination of flooded and non-flooded vegetable gardens, and to evaluate the health risks to local population. Contamination levels of arsenic, cadmium, lead, mercury and zinc were measured in soil and homegrown vegetable samples and bioconcentration factors and hazard indices were calculated. The high metal contents of flooded vegetable gardens were caused by floods, the results indicated significant differences between flooded and non-flooded vegetable gardens. The most accumulating vegetable was sorrel, the most mobile elements were cadmium and lead. Arsenic was not available for vegetables. The health risk was calculated for two exposure routes: ingestion of soil and ingestion of vegetables. The site-specific exposure parameters were established after a population based survey and a special equation was created to calculate the health risk due to homegrown vegetable consumption. The highest risk was associated with ingestion of vegetables, the most hazardous element being lead. The hazard index did not exceed the threshold value of one in flooded or non-flooded gardens. The analyses of health risk indicated that despite the high metal concentrations of soil the contamination of vegetable gardens does not pose an unacceptable risk to the inhabitants of the village.