【摘 要】
：
During the urbanization,different human activities,such as fossil fuel burning,waste combustion et al.,have changed the global carbon cycles andbudgets.This investigation selected the city of Nanjing,
【机 构】
：
State Key Laboratory of Soil and Sustainable Agriculture,Institute of Soil Science,ChineseAcademy of
【出 处】
：
第四届城市、工业、交通和矿山土壤国际会议(The 4th International Conference on Sol
论文部分内容阅读
During the urbanization,different human activities,such as fossil fuel burning,waste combustion et al.,have changed the global carbon cycles andbudgets.This investigation selected the city of Nanjing,Jiangsu province of China,as the study area,and analyzed the concentrations of organic carbon (OC) and black carbon (BC) of ten soils profiles,by wet chemical oxidation methods.The results showed that the concentration of BC ranged from 0.22 g kg-1 to 32.19 g kg-1 in all urban soil profiles,and the average concentration of BC reached 4.3 5 g kg-1.The average concentration of BC influenced by ancient residential areas was 0.91 g kg-1,that of affected by ancient industrial activities was 8.62 g kg-1,by the modem industrial and traffic emission was 3.72 g kg-1.The ratio of BC/OC ranged from 0.03 to 1.59 in culture layers in soil profiles,and the average was 0.29.These data mean that some BC particles produced by local biomass and/or fossil fuel burning due to the industrial and transport activities during development are recorded in soils.In addition,the contents of BC and the ratio of BC/OC may reflect different processes of human activities and pollution intensities of urban soils.It is concluded that the soil BC in urban area is mainly coming from fossil fuel burning,more specifically,BC in present surface layer is mainly from traffic environment (especially diesel vehicles),and while in cultural layer it is most possibly related to the historical coal use.
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