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Heavy Metal Accumulation in Selected Plants Irrigated with Sittaung River Water in Taungoo Area
- Taungoo is located at the west bank of Sittaung River, Bago Region. It is situated on northern part of central alluvial plane of Sittaung River basins. There are small scale farmlands along the Sittaung River bank in Taungoo area. In this study, six soil samples from farmlands along the Sittaung River bank in Taungoo area were collected together with four selected plants viz., bean (Phaseolus vulgaris), brinjal (Solanummelongena), spinach (Spinaciaoleracea) and asparagus (Asparagus officinalis) for some heavy metals (Zinc, Copper, Manganese, Cadmium, Chromium and Lead) investigation by using atomic absorption spectrophotometer. Some heavy metals (cadmium, chromium, lead, copper, manganese and zinc) concentrations in soils from irrigated farmlands were determined and it was found that chromium was not detected in soil samples. The concentrations of heavy metals were below the respective maximum recommended limits. Among heavy metals determined, manganese content was the highest (158.15 ppm) followed by zinc (35.42 ppm), copper (21.30 ppm), cadmium (0.054 ppm) and lead (0.005ppm). Among the plants, manganese uptake was highest in asparagus (57.27 ppm) followed by spinach (44.43 ppm), bean (42.05 ppm) and brinjal (28.40 ppm). High zinc contents in plants inhibit the cadmium uptake. Lead mobility from soil to plants was low in this study. Though heavy metals were absorbed, their concentration were below WHO/FAO recommended limits. Vegetables cultivated with irrigated Sittaung River water may be considered safe for consumption.
Myat Sandar Hla
Ni Ni Sein
- University of Yangon Research Journal