Assessment of Heavy Metal Contamination in Roadside Soils Along the Shenyang-Dalian Highway in Liaoning Province, China
Zhang Hui1-3, Wu Caiqiu4, Gong Jiping1, Yuan Xuyin5, Wang Qiao3,7, Pei Wenming1, Long Tao1, Qiu Jie1, Zhang Hanpei6
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1Nanjing Institute of Environmental Sciences, Ministry of Environmental Protection of China,
Nanjing 210042, China
2Collaborative Innovation Center of Atmospheric Environment and Equipment Technology,
College of Geography and Remote, Nanjing University of Information Science and Technology,
Nanjing 210044, China
3School of Geographical Sciences, Nanjing Normal University, Nanjing 210023, China
4Shanghai Water Supply Administration, Shanghai, 200081, China
5College of Environment, Hohai University, Nanjing 210098, China
6The University of Hawaii, Honolulu, 96815, USA
7Satellite Environment Center, Ministry of Environmental Protection of China,
Beijing 100029, China
Online publish date: 2017-07-12
Publish date: 2017-07-25
Submission date: 2016-11-17
Final revision date: 2017-02-09
Acceptance date: 2017-02-09
Pol. J. Environ. Stud. 2017;26(4):1539–1549
Heavy metal contaminations were assessed through a detailed soil survey in roadside soils along the Shenyang-Dalian Highway of Liaoning Province, China. Pb, Cu, Cd, Ni, and Zn were analyzed using atomic absorption spectrophotometry. The average concentrations of Pb, Cu, Cd, Ni, and Zn in roadside soils were 43.8, 26.5, 0.119, 32.1, and 71.3 mg/kg, respectively, and all concentrations exceeded the background values. Different heavy metal distribution patterns were found under different land use types. In farmland, a peak metal concentration occurred 25 m from the roadside soil, while in the forest and orchard soil all heavy metals decreased with distance from the roadside, which conformed to the exponential model. Heavy metal concentrations were markedly higher than those measured in 1999 and 2007, except for Cd. Concentrations in soils along the Shenyang-Dalian Highway were medium or low in comparison with roadside soils in other cities around the world. Overall, this assessment illustrates that heavy metal pollution in these soils is generally low, and we recommend that more attention should be given to Pb contamination in roadside soils along the Shenyang-Dalian Highway.