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KMID : 1024520120210010057
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Journal of the Environmental Sciences
2012 Volume.21 No. 1 p.57 ~ p.67
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Removal of Diazinon and Heavy Metals in Water by Benthic Macroinvertebrate
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Lee Hwa-Sung
Ryoo Keon-Sang
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Abstract
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The midge samples were undertaken at three streams, representing different surrounding environments, to investigate the contaminant exposure of midge. The content of heavy metals in midge collected in Singil stream were generally higher as a result of input to the industrial effluents with respect to other streams. Adsorption experiments were done to evaluate the possibility of removing contaminants from water with midge. Diazinon and heavy metals were contaminant target compounds in this study. The removal rate of diazinon in water by midge was 60-75%. In the case of Cu, the removal rate was reached around 90% at the lower initial concentration of 1.87 and 0.81 ppm rather than 4.25 ppm. The reduction of concentration of Cr and Cd according to the lapse of time was similar to the Cu, but their removal rates were shown 50% and 60-74%, respectively. The removal rate of Zn by midge represented relatively high level within the experimental condition. No change in concentration of Cr and As with time were occurred at all experimental conditions. It accounts for the fact that the reduction of Cr and As could not be achieved through the adsorption process, using midge
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KEYWORD
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Benthic macroinvertebrates, Diazinon, Heavy metal, Midge, Removal rate
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