Assessment of metal pollution, Hg, Cr and Ni in the groundwater resources for aquaculture (Case study: Lavasan, Tehran province)

Document Type : Animal environment

Author

Department of chemistry, Faculty of science, Varamin-Pishva Branch, Islamic Azad University, Pishva, Iran

Abstract

 A study was done to identify and measure concentration of heavy metals including Cr, Ni, and Hg in Iran on the ground water sources on Lavasanat area of Shemiranat district in the northern Tehran. In this study atomic absorption spectrometry (AAS), graphite stove and laboratory methods were used. Seven sampling stations were determined based on geographical, climatic, physical, biological and chemical characteristics of this region. Results showed that the highest concentration of Hg was related to stations Barg-e-Jahan (1) and Zard-e-Band (4) while the lowest was observed at station Niknam Deh (5).  Concentration diagram indicated that the trend of Hg concentration was inconsistent and irregular the stations Kond-e-Sofla (6) and Rahatabad (7) showed the highest and lowest concentration of Cr respectively. There was a descending trend for Cr concentration. The highest and lowest amount of Ni was related to stations Zard-e-Band (4) and Rahatabad (7) respectively. The variation of Ni concentration showed the same trend as Hg. 

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