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Distribution of heavy metals in agricultural soils near a petrochemical complex in Guangzhou, China

Distribution of heavy metals in agricultural soils near a petrochemical complex in Guangzhou, China,10.1007/s10661-008-0363-x,Environmental Monitoring

Distribution of heavy metals in agricultural soils near a petrochemical complex in Guangzhou, China   (Citations: 15)
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The aim of the study was to investigate influence of an industrialized environment on the accumulation of heavy metals in agricultural soils. Seventy soil samples collected from surface layers (0–20 cm) and horizons of five selected pedons in the vicinity area of petrochemical complex in Guangzhou, China were analyzed for Zn, Cu, Pb, Cd, Hg and As concentrations, the horizontal and vertical variation of these metals were studied and geographic information system (GIS)-based mapping techniques were applied to generate spatial distribution maps. The mean concentrations of these heavy metals in the topsoils did not exceed the maximum allowable concentrations in agricultural soil of China with the exception of Hg. Significant differences between land-use types showed that Cu, Pb, Cd, Hg and As concentrations in topsoils were strongly influenced by agricultural practices and soil management. Within a radius of 1,300 m there were no marked decreasing trends for these element concentrations (except for Zn) with the increase of distance from the complex boundary, which reflected little influence of petroleum air emission on soil heavy metal accumulation. Concentrations of Zn, Cu, Pb, Cd, Hg and As in the five pedons, particularly in cultivated vegetable field and orchard, decreased with soil depth, indicating these elements mainly originated from anthropogenic sources. GIS mapping was a useful tool for evaluating spatial variability of heavy metals in the affected soil. The spatial distribution maps allowed the identification of hot-spot areas with high metal concentration. Effective measures should be taken to avoid or minimize heavy metal further contamination of soils and to remediate the contaminated areas in order to prevent pollutants affecting human health through agricultural products.
Journal: Environmental Monitoring and Assessment - ENVIRON MONIT ASSESS , vol. 153, no. 1, pp. 365-375, 2009
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    • ...Meanwhile, heavy metal accumulation in soil has become worldwide concern, particularly in China, with the rapid development of industrialization and urbanization [14]...
    • ...Study on the effects of metal ions on the biodegradation of biphenyl was necessary because metals have been widely distributed in soil and wastewater [13, 14]...

    Ang Liet al. Characterization of a Newly Isolated Biphenyl-Degrading Bacterium, Dye...

    • ...The contamination by heavy metals (HMs) of agricultural soils is of increasing concern due to the potential health risk via food chain (Gupta and Gupta 1998; Alexander et al. 2006; Chojnacka et al. 2005; Li et al. 2009)...
    • ...Based on the previous reports (Li et al. 2009; Svendsen et al. 2007), Hg is mainly bound with organic matters in topsoil, which can prevent further migration downward in soil...

    Jiang YuZhiyonget al. Evaluation of ecological risk and source of heavy metals in vegetable-...

    • ...On the other hand, many documents reported there were some high relationships between soil trace elements, which meant that there might be the same sources (Li et al. 2009; Rodríguez Martín et al. 2006)...
    • ...So a lot of papers show organic matter has a positive linear relationship with trace elements (Dragovi et al. 2008; Li et al. 2009; Liu et al. 2006; Mico et al. 2006; Rodríguez Martín et al. 2006)...
    • ...Our result showed CEC had not significantly influenced any trace elements, consistent with those obtained by Lucho-Constantino et al. (2005) except Pb, and contradicted those obtained by Mico et al. (2006) and Li et al. (2009)...
    • ...In contrast to these significant positive linear correlations, some scientists presented there were inverse or weak correlations between trace elements and clay content (Li et al. 2009; Lucho-Constantino et al. 2005; Navas and Mach 2002)...

    Chenglong Tuet al. Accumulation of trace elements in agricultural topsoil under different...

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