Seasonal Fluctuation of Heavy Metal and Nitrate Pollution in ground water of Farmlands in Talesh, Gilan,Iran
Journal Title: International Journal of Farming and Allied Sciences - Year 2013, Vol 2, Issue 20
Abstract
There are very few studies evaluating the heavy metals and nitrate contents in their soils and groundwater in the north provinces and cities in Iran although majority of rice, tea and other crops comes from these location. Dangerous contents of Cadmium and Lead could been found in recent years in Mazandaran and Gilan agricultural products due to contaminated source tapped to address population and over fertilization with chemical fertilizers and high rain falling.A descriptive – analytical and cross-sectional study was conducted for determination of Lead and Cadmium as heavy metals and nitrate in 100 samples of ground water and soil of 10 different sites in Talesh in the North of Iran in three consequent months in (winter and spring;summer, 2013). The results revealed that all samples in panjahaft had lead and nitrate contents above maximum level 0.01 mg/L and 50 mg/L which is recommended by WHO (WHO, 2007; US/EPA, 2013) and Lead was present in detectable amounts in all samples while cadmium content in all samples was lower than permissible levels of WHO 0.003 mg/L. In this study, among 100 groundwater samples, 6 samples (with mean Lead content of 0.006 mg/L, about 0.00 mg/L Cadmium content and 26.14 mg/L nitrate content ) in winter were classified in “Excellent” class for drinking, while 53 samples ( mostly in summer season had nitrate content 50 mg/L , but lead content 0.01 mg/Lit) , and 41 samples were in “Poor” class due to had Lead and Nitrate more than permissible levels.
Authors and Affiliations
Forough Seifi-Nigje Gheshlagh, Parisa Ziarati, Sepideh Arbabi Bidgoli
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