查看文章

The level of chromium (Cr) contamination in soils and irrigated mine wastewater at South Kaliapani chromite mine region of Orissa, (India) were investigated. Chromium bioaccumulation in rice plants (Oryza sativa L. cv. Khandagiri) irrigated with Cr⁺⁶ contaminated mine wastewater was analyzed along with its attenuation from mine wastewater. The levels of Cr⁺⁶ in irrigated mine wastewaters in successive rice grown plots were analyzed on 75 days and 100 days after transplantation of seedlings. Total chromium content in different parts of rice plants and soil samples from different plots was analyzed during harvesting stage (125 days after transplantation). Cr accumulation was significantly high in surface soils (0–20 cm) with a mean value of 11,170 mg kg⁻¹, but it decreased significantly after the crop harvest. About 70% to 90% reduction of Cr⁺⁶ levels was observed in irrigated mine wastewater when passed …