Characteristics and Health Risk Evaluation of Soil Pollution from a Typical Lamp Enterprise Site
The site of a large lamp manufacturer was taken as a research object in this paper,and the spatial distribution and health risks of three soil specific pollutants,arsenic,molybdenum and tungsten,were analyzed.The results indicated that based on the single pollution index method,the overall pollution levels of the three pollutants on the site were classified as clean or relatively clean,and some samples were over the limits.The distribution of these pollutants in the surface soil was highly uneven,with variation coefficients being 2.53,3.99,and 1.68,respectively.The over-limit points were mainly located in areas such as production workshops and warehouses,mainly due to previous production.There were also some over-limit pollution spots in the office areas,likely due to previous transportation and fill of polluted soil and construction debris while site leveling for reconstruction and expansion.The vertical distribution of pollutants was primarily influenced by characteristics of soil layers,with most over-limit samples located in the miscellaneous fill layer within 0～1.5 m depth.In areas with thin miscellaneous fill layer and high pollution concentration,vertical migration of pollutants was significant,reaching the depth up to 3.5～4.5 m.Under Classification I land use condition,the non-carcinogenic risk quotients of mercury,molybdenum,and tungsten were 11.37,15.00,and 6.51,respectively,all of which exceed acceptable limits.Remediation and control measures need to be implemented before the site is redeveloped.
Lamp enterprisescontaminated siteheavy metalsspatial distribution of pollutanthealth risk evaluation
万方数据
维普
