Environmental Monitoring and Assessment

, Volume 176, Issue 1–4, pp 677–691 | Cite as

Heavy metals assessment and identification of their sources in agricultural soils of Southern Tehran, Iran

Article

Abstract

A detailed investigation was conducted to evaluate heavy metal sources and their spatial distribution in agricultural fields in the south of Tehran using statistics, geostatistics, and a geographic information system. The content of Cd, Cu, Co, Pb, Zn, Cr, and Ni were determined in 106 samples. The results showed that the primary inputs of Cr, Co, and Ni were due to pedogenic factors, while the inputs of Zn, Pb, and Cu were due to anthropogenic sources. Cd was associated with distinct sources, such as agricultural and industrial pollution. Ordinary kriging was carried out to map the spatial patters of heavy metals, and disjunctive kriging was used to quantify the probability of heavy metal concentrations higher than their recommended threshold values. The results show that Cd, Cu, Ni, and Zn exhibit pollution risk in the study area. The sources of the high pollution levels evaluated were related to the use of urban and industrial wastewater and agricultural practices. These results are useful for the development of proper management strategies for remediation practices in the polluted area.

Keywords

Geostatistics Principal component analysis Heavy metals Environmental pollution Tehran 

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Copyright information

© Springer Science+Business Media B.V. 2010

Authors and Affiliations

  1. 1.Department of Agriculture, Saveh BranchIslamic Azad UniversitySavehIran
  2. 2.Head Soil Science Department, Faculty of Agriculture and Natural Resources, Science and Research BranchIslamic Azad UniversityTehranIran

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