Pulse polarographic investigations of adsorption study and leaching of carbaryl on five soils to evaluate groundwater contamination
Publication Date : 07/03/2018
Pesticide adsorption by the soil is a naturally occurring phenomenon and affects ground and surface water contamination through leaching. The pesticide leaching is evaluated in terms of groundwater ubiquity score (GUS). A pulse polarographic investigation on the adsorption of carbaryl on five soils has been carried out by a batch equilibrium technique to evaluate its leaching potential an index to evaluate surface and ground water contamination. The proposed pulse polarographic investigation is based on the appearance of an analytically useful diffusion-controlled peak at -110 mV upon hydrolysis and subsequent reaction of insecticide with carbon disulphide and copper(II) perchlorate. Carbaryl in the range 0.27 to 4.02 µg mL-1 can be assayed with a correlation coefficient of 0.989. The GUS for carbaryl with all five soils with different characteristics has been found in the range 1.81-2.17 which classify it as a transition insecticide thus has a potential to contaminate surface and ground water.
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