The Characteristics Of Sediments Polluted By Petroleum & Effect On The Quality Of Water Source

With the fast development of oil industry in the Yan'an districts ,a increase amount of oil pollutants drained aquatic environment caused serious environmental pollutation in Yan'an districts .Wang Yao Reservior is important drinking water resources of the City of Yan'an . Water quality of Wang Yao Reservior have been seriously affected. The purpose of the treatise is to appraise the polluting conditions and leveK and to study the characters of oil pollutants' plane and vertical distribution in sediments , the realeasing laws of oil pollutants in sediments to above water body. The article supplies scientific base to control and harvess water resources and ensure the water quality to come to the standard of drinking water.The article has determined and analyzed the material composition and the content of PAHs in water body of Wang Yao Reservoir. There are 71 compounds in the water body of Wang Yao Reservoir , and which can be divided to 13 species. In which there are 10 compounds to be labeled as Priority Pollutants by EPA. And there are 6 compounds belonging to the "black list" of Priority Pollutants prescribed by China. The content of PAHs in water varies from 0.9 × 10-9g/L to 17 × 10-9g/L.The article has analyzed the laws of oil pollutants distribution in sediments. The content of oil pollutants in sediments varies from 70.29-1013.18mg/kg, From which we can conclude that oil pollution is serious. The longitudinal content of oil pollutants in sediments vary little, which proves that oil pollution had not been controlled effectively in recent years.The article has studied dynamic process of oil pollutants' release, and deduced the equation of release of oil pollutants in sediments to water body.