Research On Evaluation And Prediction Of The Soil Contamination In A Uranium Mine In China

In recent years, with the advancing of global industrialization, all countries focuson developing the clean-energy,the nuclear power as a clean-energy also been givenmore and more attention.However, with the continuous development of global nuclearenergy and strengthen uranium mining, the gradual increasing uranium tailings andthe improper handling of the decommissioning nuclear facilities caused a significantthreat to human living environment, which caused particularly serious situation ofuranium mining is the soil heavy metal pollution.Therefore, the soil heavy metalspollution assessment of uranium mines of is imminent.This topic mainly pollution research evaluation and prediction problem of theextent of contamination at a uranium mine, by predicting,giving some suggestions tofixing this problems. The main work is as follows:（1）、Study on Using several methods which are applied more in the evaluation ofsoil heavy metal pollution,the results showed that: the geoaccumulation index andpotential ecological risk index method for the evaluation of uranium mining pollutionis more effective.（2）、Using the fault tree analysis method to study the source of soil heavy metalspollution in a uranium mine,the results showed that: water efflux is the main sourceof heavy metals.（3）、Using the geoaccumulation index and potential ecological risk index methodto evaluation U、Cd、Cr、Cu、Mn、Ni、Pb、Zn this eight heavy metals of a uraniummine in China,the results show that:1) the pollution of Cd and U are most serious,followed by Cr, Cu and Zn, Mn, Ni, Pb, are less pollution or no-pollution;2) thecomprehensive pollution level of the uranium mine is in a high level;（4）、Using the exponential smoothing method,according to heavy metal pollutiondata of this area nearly14years (2000-2013) to predict heavy metal content in soil ofthe uranium mines in five years later (2018), the results show that: five years later, the concentration of U, Cd, Cr, Cu, Mn and Ni these six elements are up1.048-fold,1.108-fold,1.035-fold,1.025-fold,1.080and1.050-fold to2013of the uraniummine;The content of elements Pb and Zn is0.537-fold,0.494-fold declining to2013.（5）、Introduction several methods which are applied more in the restorationfield,such as engineering approach, physical and chemical methods,bioremediationmethods, combined with the status of the uranium mines, the conclusion is:bioremediation technology is the focus of future researching.