Abstract
The fate of antibiotics entering the environment raised concerns on the possible effect of antimicrobial resistance bacteria. Prediction of the fate and transport of these particles are needed to be determined, significantly the diffusion coefficient of antibiotic in water at infinite dilution. A systematic determination of diffusion coefficient of antibiotic in water at infinite dilution of five different kinds of livestock antibiotics namely: Amtyl, Ciprotyl, Doxylak Forte, Trisullak, and Vetracin Gold in the 293.15 to 313.15 K temperature range are reported through the use of the method involving the electrolytic conductivity measurements. A continuous stirred tank reactor is utilized to measure the electrolytic conductivities of the considered systems. These conductivities are correlated by using the Nernst-Haskell equation to determine the infinite dilution diffusion coefficient. Determined diffusion coefficients are based on the assumption that in dilute solution, these antibiotics behave as strong electrolyte from which H+ cation dissociate from the antibiotic’s anion.
Highlights
The fate of antibiotics entering the environment has many concerns regarding on its possible effects on the disturbance of the natural bacterial ecosystem
This will result to the development of antibiotic-resistant bacteria, which can lead to a serious threat to human health
This study mainly focuses on the estimation of diffusion coefficient of antibiotics in water at infinite dilution through the use of electrolytic conductivity method
Summary
The fate of antibiotics entering the environment has many concerns regarding on its possible effects on the disturbance of the natural bacterial ecosystem. It is important to know the fate and transport of antibiotics released in the environment to be able to properly evaluate the risks, the effects and the potential impacts of these products [1]. Diffusion coefficient indicates how individual molecules and ions move through a medium under a concentration gradient at a certain pressure and temperature. It often controls the source of a contaminant (antibiotic) released to the environment and flow usually becomes its main transport process. The diffusion coefficient in water at infinite dilution of the common livestock antibiotics which is rampantly used in the Philippines was indirectly determined using electrolytic conductivity data. NernstHaskell equation was used to estimate the diffusion coefficient in water at infinite dilution of the considered system
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