Research On Spatial Differentiation Of Surface Black Carbon In Mining Cities

The accumulating of Black Carbon has a important influence on global environment.In our research,we selected Jiaozuo City which is a more than 100 years mining industry city as research object.Besides,we use four representative ground surface,which are farmland,forest land,green land and road land.We compared the accumulation and distribution of black carbon in different kind of ground surface.Based on the measured value of TOC and BC of 119 sample in Jiaozuo City,we researched on the coal mining's contribution to TOC and BC of spatial accumulation and distribution.In addition,we compared the TOC and BC in different depth of soil,distance to mine field and distance to road.For research economic forest and ecological restoration forest,we collected 42 soil sample from forest land.The samples for green land were gathered from 33 samples in Long yuan hu park,Jiao xi ecological garden and road green corridor.We had 93 samples for the green land research.Through sample data,we analyzed the distribution pattern of Greenland BC,park green space BC road green corridor BC.Based on 26 samples of road dust,we researched on the distribution of BC in Jiaozuo city with park green space and the road green corridor.Result shows: The BC and TOC of mine field are much more than non coal mining area.With the increased of soil depth,BC and TOC in both of the fields are increased first,then start to decrease after a certain depth.With the increased of distance to electric power plant,the BC in mine field are decreased first,then start to increase after a certain distance.The BC in farmland near the road of mine field will be decreased if the distance to road increased.The contents of BC and TOC are high and no same in different place of Jiaozuo City.They depend on the location of heavy manufacturing.The content of surface dust in road land is higher than the content in farmland and green land.Even in different roads,the contents are different.If the road is near to mine field,the BC is more than 80%.Compared to remote area,the BC is really higher in downtown area.The reason is that vehicle exhaust and domestic garbage will impact the BC level.