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Effects of heavy metal contamination from anthropogenic sources on Dasarahalli tank, India
This study examines the concentrations of various heavy metals, and their distribution in a hyper‐eutrophic urban Dasarahalli tank system, which is being polluted from industrial, domestic and sewage effluents. The concentration of iron (Fe), zinc (Zn), copper (Cu), nickel (Ni), chromium (Cr), lead (Pb) and cadmium (Cd) in water, plant (Alternanthera philoxeroides) and sediment samples was determined. The water‐soluble (bioavailable) fractions of heavy metals correlated positively with their total concentration, exhibiting the following sequence of bioavailability: Zn > Cd > Ni > Fe > Cu > Pb > Cr. A. philoxeroides exhibited a maximum bioaccumulation factor for cadmium (3913). The mean values of all types of collected samples were correlated with the corresponding mean values in a control tank (Vasanthapura tank). The sequence of the order of the concentrations of the metals in water, plant and sediment samples exhibiting higher values than those observed in the control tank was as follows: Cr > Ni > Pb > Cu > Fe > Zn, Cd > Cr > Fe ≈ Zn ≈ Cu ≈ Pb and Pb > Cu ≈ Cr > Zn ≈ Ni > Fe, respectively. The geoaccumulation indices of the heavy metals revealed that the tank is moderately contaminated. As A. philoxeroides is extensively used for human consumption and also as cattle fodder, there is a growing health risk that these metals could find their way into the human food chain.
Effects of heavy metal contamination from anthropogenic sources on Dasarahalli tank, India
This study examines the concentrations of various heavy metals, and their distribution in a hyper‐eutrophic urban Dasarahalli tank system, which is being polluted from industrial, domestic and sewage effluents. The concentration of iron (Fe), zinc (Zn), copper (Cu), nickel (Ni), chromium (Cr), lead (Pb) and cadmium (Cd) in water, plant (Alternanthera philoxeroides) and sediment samples was determined. The water‐soluble (bioavailable) fractions of heavy metals correlated positively with their total concentration, exhibiting the following sequence of bioavailability: Zn > Cd > Ni > Fe > Cu > Pb > Cr. A. philoxeroides exhibited a maximum bioaccumulation factor for cadmium (3913). The mean values of all types of collected samples were correlated with the corresponding mean values in a control tank (Vasanthapura tank). The sequence of the order of the concentrations of the metals in water, plant and sediment samples exhibiting higher values than those observed in the control tank was as follows: Cr > Ni > Pb > Cu > Fe > Zn, Cd > Cr > Fe ≈ Zn ≈ Cu ≈ Pb and Pb > Cu ≈ Cr > Zn ≈ Ni > Fe, respectively. The geoaccumulation indices of the heavy metals revealed that the tank is moderately contaminated. As A. philoxeroides is extensively used for human consumption and also as cattle fodder, there is a growing health risk that these metals could find their way into the human food chain.
Effects of heavy metal contamination from anthropogenic sources on Dasarahalli tank, India
Lokeshwari, H. (author) / Chandrappa, G. T. (author)
Lakes & Reservoirs: Research & Management ; 12 ; 121-128
2007-09-01
8 pages
Article (Journal)
Electronic Resource
English
Effects of heavy metal contamination from anthropogenic sources on Dasarahalli tank, India
| Online Contents | 2007