HYGIENIC INVESTIGATION OF SOIL POLLUTION WITH VOLATILE ORGANIC COMPOUNDS IN A MUNICIPAL LANDFILL AREA

摘要

Volatile organic compounds (VOCs) are substances with well expressed toxic and carcinogenic effects. Their sorption and release from soils is highly dependent upon organic matter content, temperature, saturation and salinity. The main route of human exposure to VOCs is through the respiratory tract and skin with intake via the gastrointestinal tract being less common. The investigation is executed in the region of a municipal landfill near the Suhodol village in Sofia, Bulgaria. The intensively used private agricultural land between the landfill and the village is at high risk for potential VOC pollution. Possible horizontal substance migration is studied through technical estimation of VOC presence in soil subsurface and in 1 m depth. Soil matrix and soil gas samples were taken from selected bore holes and investigated for presence of typical for municipal landfills volatile organic pollutants-vinyl chloride, 1,2-dichloroethane, benzene, toluene, ethylbenzene, xylenes and methane. The results obtained are compared qualitatively with the landfill monitoring data for the landfill gas drainage systems. Evaluated is the health hazard risk for the population from the nearby village and future prophylactic measures for residents and land use are discussed.