Article Abstract:
Butyltins (BT) are organotin compounds which enter the aquatic environment in the form of biocides and slimicides. Accumulation of BT in aquatic organisms pose serious harm to other members of the food chain. A study investigating the accumulation of BT compounds in the liver of Risso's dolphins has shown a high level of contamination in the marine mammals. Although there were no differences in BT concentrations between males and females, results showed a slow excretion rate of BTs. Levels of BT concentrations also increased until maturity, but had no effect on the dolphins' reproductive processes.
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Article Abstract:
Standard EPA analytical methods were utilized to evaluate the efficiency of two soil sample collection methods such as the conventional bulk method and the methanol method. Spike recovery studies indicated the lost of significant quantities of volatile organic compounds (VOC) from 50 soil samples that were collected by bulk method. On the other hand, the soil samples collected by the methanol method preserved the original VOC content of the soil but it also exhibited low levels of volatilization.
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Article Abstract:
The postapplication volatilization rates of pesticides from agricultural soils are studied using the relaxed eddy accumulation (REA) technique. The technique, which is a variation of the eddy correlation method, uses a numerical formulation to represent the important system parameters and solved for the pesticide fluxes. The results indicate that the REA method performs better than the traditional aerodynamic-gradient technique in the measurement of pesticide volatilization from fallow soil.
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