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کنگره و نمایشگاه بین المللی معدن
جزئیات رویداد
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  • groundwater and soil contamination by heavy metals in former uranium mining site, eastern thuringia, germany

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    • تاریخ ارائه: 1389/07/20
    • تاریخ انتشار در تی پی بین: 1389/07/20
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     this article deals with heavy metal pollution in groundwater and soil affected by former uranium mining activities in eastern thuringia, germany. during mining, sulfide minerals were oxidized and dissolved later on by flooding during the following termination forming acid mine drainage (). infiltrated into the soil, and polluted the water-soil system with high concentration of rare earth elements (ree) and heavy metals. the solubility and mobility of heavy metals in soil and groundwater play a key role for prediction of their bioavailability and toxicity. the groundwater aquifer is relatively close to the surface. the soil above the groundwater is considered as the main source of contamination. hence, 190 groundwater samples were collected from the area to provide the characteristics of groundwater. furthermore, 88 soil samples have been eluted with different solutions (water and nh4no3), 40 chemical and physicochemical features including ph, and metals including rees were analyzed in groundwater and soil leached. the data were subjected to cluster and factor analysis to determine the relation between ree and other metals or physicochemical factors. the ree patterns obtained through normalization to (post archean australian shale) were used as a tool to study the water-soil interaction. as the result, there are high similarities between ree and al, cu, fe, u and y. ree and the other metals concentration are ph value dependent and have inverse relation with this value. the groundwater samples are more similar to the elution with aqua solution of nh4no3 than to the water samples that show that groundwater is the result of more processes than only dissolution of soluble minerals, but also interaction with different soil compounds.

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