Study On Migration And Transformation Of Manganese In Vadose Zone Of A Manganese Streel Works In Jiaocheng Area

Shanxi province is famous for its large energy province,coke,coal,thermal power,chemical and metallurgical industry is numerous,serious environmental pollution,while the underground water is the main water in our province's life and production safety,pollution emissions of all types of enterprises ready to threaten the groundwater quality,so the research on Pollutants may cause the impact on the environment prediction and study of the migration transformation rule is very important.This paper takes Shanxi city of Lvliang province Jiaocheng a steel factory as the research object,analyzes the manganese migration in local soil in transformation.By the investigation on site surrounding hydrogeological conditions and soil parameters,calculate the aeration zone of soil hydraulic parameters and vertical permeability coefficient,and analyzes the potential pollution area and the surrounding source,on the basis of using HYDRUS-1D software modeling,prediction due to suggest a slag pool bottom caused by groundwater seepage failure pollution and.The main conclusions are as follows:Manganese is mainly distributed in the soil surface(0-20cm),the downward migration increased with the increase of Mn;in the tested sequence residues in soil: residual oxide bound > > organic bound,carbonate bound,exchangeable.The activity of Mn in soil was low,which was easy to be trapped in the tested soil.The acidic leaching solution could increase the content of manganese in the soil column and increase the leaching rate of manganese in the soil.The migration of manganese in the soil column with calcium hydroxide was limited,and the content of carbonate bound increased.The Mn was converted to the residue state,the oxide bound state and the organic bound state of the soil after about 80%-90%.It is found that the slag pool and the slag field are the possible pollution sources around the plant.Because the slag pool sewage leakage is usually difficult to detect,with a certain degree of concealment,with the possibility of groundwater pollution;in the field of slag slag heap leaching in leaching manganese may,through the vadose zone into groundwater pollution.Through the monitoring of the water quality of the slag pool and the leaching test of the slag field,the slag pool is the main pollution source.On the basis of the parameters of the local soil,the vertical onedimensional solute transport model was established by HYDRUS-1D,and the variation curves of the adsorption concentration of soil profile with time and depth were obtained.The changes of the concentration of pollutants in the soil with different depth profiles were analyzed with the time,and the adsorption time of the manganese in the whole soil profile was saturated.