Research based on 3MRA model about the risk assessment methods and applications of the landfill waste

Seven major contaminations of the landfill were selected from northeast of China,and the migration and transformation of contaminations environmental medias were studied by using the multimedia multipathway and multireceptor risk assessment(3MRA) model.The results show,the order of the radical concentration of the seven contaminations is Ni2+BenzeneCdPbCr6+AsHg.The radical concentration of benzene、 As and Hg in human is similar to that of ecology,respectively.The radical concentration of Cd and Ni2+in human is higher than that of ecology,while the radical concentration of Cr6+ in ecology is higher than that of human.The risk and hazard quotient of the groundwater in the landfill is 5.06×10-7,2.3×10-1,respectively.