Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8873248 | Geoderma Regional | 2018 | 8 Pages |
Abstract
The present study aimed at characterizing the spatial distributions and investigating the contents of six heavy metals (Co, Ni, Cu, Zn, Cd and Pb) in top soils, surrounding the National Iranian Lead and Zinc Company (NILZ) in Bonab Industrial Estate (Zanjan-Iran) by Geostatistical analyst and Moran's I autocorrelation index. The soil samples (126) were collected from the area with a radius of 5 km of the NILZ Company. The average amount of Co, Ni, Cu, Zn, Cd and Pb metals were 4.16 mg kgâ 1, 26.38 mg kgâ 1, 18.31 mg kgâ 1, 684.11 mg kgâ 1, 5.79 mg kgâ 1, and 119.59 mg kgâ 1, respectively. Principal Components Analysis (PCA) classified the investigated heavy metals in two groups. These groups were Factor I (Pb and Cu) and Factor II (Co, Ni, Zn and Cd) that confirm exist the anthropogenic source of the pollutants. Moran's I autocorrelation index was cleared that the high-high spatial clusters of topsoils contaminated with heavy metal were located in the center of study area, near NILZ Company. It was deduced that the company activities have a big impact on distribution of heavy metal in study area. Geostatistical analysis revealed that the high values of all studied heavy metals were located near the NILZ Company. According to comparison the prepared and land use maps, it was cleared that pesticides and chemical fertilizers, geochemistry and anthropogenic sources are the main factors in spatial variation of heavy metals.
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Earth-Surface Processes
Authors
Younes Khosravi, Abbas Ali Zamani, Abadol Hossein Parizanganeh, Mohammad Reza Yaftian,