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| Distribution and risk assessment of soil heavy metals in Shenfu new city during urbanization process |
| Received:October 13, 2015 |
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| KeyWord:heavy metals;urbanization;soil pollution;risk assessment |
| Author Name | Affiliation | E-mail | | ZANG Xing-hua | School of Civil Engineering Beijing Jiaotong University, Beijing 100044, China
Beijing Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard, Beijing 100044, China | | | LU Yin-tao | School of Civil Engineering Beijing Jiaotong University, Beijing 100044, China
Beijing Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard, Beijing 100044, China | yintaolu@hotmail.com | | YAO Hong | School of Civil Engineering Beijing Jiaotong University, Beijing 100044, China
Beijing Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard, Beijing 100044, China | | | ZHANG Shi-chao | School of Civil Engineering Beijing Jiaotong University, Beijing 100044, China
Beijing Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard, Beijing 100044, China | | | JIA Xiao-jie | School of Civil Engineering Beijing Jiaotong University, Beijing 100044, China
Beijing Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard, Beijing 100044, China | |
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| Abstract: |
| We mapped the spatial distribution of heavy metals(Pb, Cd, Zn, Cu, Ni and As) in 58 surface soil samples from different land use types of Shenfu new city and evaluated the impact of urbanization on the distribution and risks of heavy metals by comparing with their background values. Results showed that the concentrations of heavy metals in the east part were higher than those in the west part of the region. Soil Zn, Cd and Pb mainly concentrated in the vicinity of the highways and crossover, while high concentrations of Cu and Ni were mainly found in the industrial area with Chemical Plants, Steel Plants and Electrical Control Equipment Plants. These indicated that industrial activities contributed a lot to the Cu and Ni pollution. The As distribution was affected relatively greatly by the soil system structure and at the same time by human factor or exogenous substances to certain extent. We evaluated the level of heavy metals in surface soils from different land types using the Nemerow pollution index. The pollution levels followed order of urban land >woodland >farmland >rural land. |
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