Pollution Characteristics and Risk Assessment for the Soil from an Open Dumping Site in a Small Town.Shandong Province

A total of 17soil samples were collected from the interior and boundary areas of an open dumping site in a small town in Shandong Province to study the concentration distribution of the pollutants,which include 15kinds of inorganic pollutants heavy metals and 195kinds of VOCs-SVOCs.The potential ecological risk and human health risk of the heavy metals detected were evaluated by comparing with the limitation of corresponding criteria,at home and abroad.The results showed that the potential ecological risk is generally low,except that soils from the interior area are at a strong to very strong level because of accumulation of Hg,when the environmental background values of Shandong Province are taken as reference values.The potential ecological risk of a single heavy metal in the soils from the interior area in the site is higher than that from the boundary area except As.Both carcinogenic and non-carcinogenic risks of soils are acceptable for children and adults.The difference in HI between children and adults is negligible.The most harmful heavy metals are As and Cr.The main ways of chronic daily average exposure are ingestion and dermal contact.