Faezeh Fazeli; Sajedeh Shabani fard jahromi
Abstract
Wetlands are the most sensitive ecosystems on Earth. Mighan wetland is the last ecological ring of Arak plain. Discharge of sewage into this wetland result in region ecological changes. Because of the extend role of this wetland in ecological and environmental protection of it’s around life, need ...
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Wetlands are the most sensitive ecosystems on Earth. Mighan wetland is the last ecological ring of Arak plain. Discharge of sewage into this wetland result in region ecological changes. Because of the extend role of this wetland in ecological and environmental protection of it’s around life, need to pay attention. This study aimed to evaluate the concentration of heavy metals )Al, Fe, Ni, Cu, Cr, Zn( in 8 stations of Mighan in summer, autumn and winter by atomic absorption spectrometry in 2012. Results showed that the highest concentration of Al, Fe, Ni, Cu, Cr, Zn were in the location of collision channels, the exit of solute factory 1, middle island1and 2, road side, middle island 2, Road side, respectively. The maximum amounts of Fe, Ni, Cu, Cr, Zn was observed in summer and the maximum amount of Al was observed in autumn. There were some correlations between Zn and COD, Fe with Cr and COD, Cr with Ni and COD, Cu with Ni and COD, Ni with COD in summer, Fe with COD and BOD, Cr with Cu and Ni, Cu with Ni and COD, Ni with COD in autumn and Fe with COD and BOD, Cr with Ni, Cu with pH, COD with BOD in winter. Overall, it seems the wetland stations had higher concentration of heavy metals compared to the wastewater stations in summer, especially. This result obtained in comparison to department of the environment’s national standard.
