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Effects ofWaste Water Application on Heavy Metals (Mn, Fe, Cr and Cd) Contamination in a Black Locust Stand in Semi-Arid Zone oflran

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A case study was undertaken to assess the long-term effects of irrigation with municipal waste water on heavy metals contamination of soil and leaf of black locust (Robinia pseudoacacia L.) trees. For this pwpose, a field study was conducted at two sites irrigated by waste water and well water in the suburban areas of Tehran, Iran. Samples of irrigation water, soil and tree leaf were collected and were analyzed for 1.1:n, Fe, Cr and Cd concentrations. Results indicated that municipal waste water had higher significantly (p

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