APPLICATION RESEARCH OF 3MRA MODEL IN THE MERCURY-CONTAINING WASTE DISPOSAL MODE SELECTION

Under the premise of full consideration of the risk characteristics and site information of mercury-containing contamination in the case，we chose 3MRA models to simulate and predict safety threshold of WP，WP-LF and WP-LF-LAU， the three processing modes for safe disposal of mercury were conducted in different setting conditions，in order to provide data information for options of waste disposal program． Simulation experiments showed that，in the simulation of ingestion exposed way，when the protection ratio and the confidence level is constant，non-carcinogenic risk threshold，calculated by waste disposal mode of WP，WP-LF，and WP-LF-LAU，would increase or be unchanged with the radial distance from case site inereased． The waste disposal mode of WP-LF not only showed better scalability with simulated distance changing，but also had a higher confidence level than the other two waste disposal models，in a certain protection ratio and a certain threshold value． WP-LF waste disposal mode is proved to be the best choice for mercury-bearing waste disposal in this case．