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Int. J. Environ. Res. Public Health 2017, 14(3), 336; doi:10.3390/ijerph14030336

Impacts from Land Use Pattern on Spatial Distribution of Cultivated Soil Heavy Metal Pollution in Typical Rural-Urban Fringe of Northeast China

College of Earth Sciences, Jilin University, Changchun 130061, China
Author to whom correspondence should be addressed.
Academic Editor: Susanne Charlesworth
Received: 4 January 2017 / Revised: 5 March 2017 / Accepted: 15 March 2017 / Published: 22 March 2017
(This article belongs to the Special Issue Heavy Metals: Environmental and Human Health)
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Under rapid urban sprawl in Northeast China, land conversions are not only encroaching on the quantity of cultivated lands, but also posing a great threat to black soil conservation and food security. This study’s aim is to explore the spatial relationship between comprehensive cultivated soil heavy metal pollution and peri-urban land use patterns in the black soil region. We applied spatial lag regression to analyze the relationship between PLI (pollution load index) and influencing factors of land use by taking suburban cultivated land of Changchun Kuancheng District as an empirical case. The results indicate the following: (1) Similar spatial distribution characteristics are detected between Pb, Cu, and Zn, between Cr and Ni, and between Hg and Cd. The Yitong River catchment in the central region, and the residential community of Lanjia County in the west, are the main hotspots for eight heavy metals and PLI. Beihu Wetland Park, with a larger-area distribution of ecological land in the southeast, has low level for both heavy metal concentrations and PLI values. Spatial distribution characteristics of cultivated heavy metals are related to types of surrounding land use and industry; (2) Spatial lag regression has a better fit for PLI than the ordinary least squares regression. The regression results indicate the inverse relationship between heavy metal pollution degree and distance from long-standing residential land and surface water. Following rapid urban land expansion and a longer accumulation period, residential land sprawl is going to threaten cultivated land with heavy metal pollution in the suburban black soil region, and cultivated land irrigated with urban river water in the suburbs will have a higher tendency for heavy metal pollution. View Full-Text
Keywords: heavy metal pollution; spatial regression; cultivated land; black soil region heavy metal pollution; spatial regression; cultivated land; black soil region

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Li, W.; Wang, D.; Wang, Q.; Liu, S.; Zhu, Y.; Wu, W. Impacts from Land Use Pattern on Spatial Distribution of Cultivated Soil Heavy Metal Pollution in Typical Rural-Urban Fringe of Northeast China. Int. J. Environ. Res. Public Health 2017, 14, 336.

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