Sorption of sulfisoxazole onto soil—an insight into different influencing factors
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Although sulfonamides (SAs) are among the most commonly used veterinary drugs and their presence in the environment is well documented, knowledge of their fate and behavior in the soil environment is still limited, especially for sulfisoxazole (SSX) which is characterized by the lowest (among other SAs) pK a value associated with acid-base equilibrium of sulfonamide group. Thus, this work was focused on determining the sorption potential of SSX onto natural soils differing in physicochemical properties. All the results were modeled using linear, Freundlich, Langmuir, Dubinin–Radushkevich, and Temkin sorption isotherms. The established sorption coefficients (K d ) for SSX were quite low (from 0.27 to 0.95 L kg−1), which indicated that this substance is highly mobile and has the potential to run off into surface waters and/or infiltrate ground water. The sorption data of SSX is well fitted to the Freundlich isotherm model (R 2 > 0.968). Moreover, we assessed the sorption mechanism of these compounds in the edaphic environment with respect to organic matter (OM) content, pH, and ionic strength. To clarify the current state of knowledge, these factors were examined much more thoroughly than in previous investigations concerning other SAs. The wide range of ionic strength examined showed positive correlation of this factor and sorption of SAs. The results also yielded new insight into dependency of sorption of SAs on organic matter content in soil.
KeywordsSulfisoxazole Sulfonamides Natural soils Sorption potential Adsorption isotherms Ionic strength
Financial support was provided by the Polish National Science Centre under grant DEC-2011/03/B/NZ8/03010.
- Białk-Bielińska A, Stolte S, Matzke M, Fabiańska A, Maszkowska J, Kołodziejska M, Liberek B, Stepnowski P, Kumirska J (2012b) Hydrolysis of sulphonamides in aqueous solutions. J Hazard Mater 221–222:264–274Google Scholar
- Białk-Bielińska A, Maszkowska J, Puckowski A, Stepnowski P (2014) Exposure and hazard identification of sulphonamides in the terrestrial environment. In: Soil pollution, ISBN 980-953-307-1137-6, InTech, Rijeka, Croatia. doi: 10.5772/57265
- Dada AO, Olalekan AP, Olatunya AM, Dada O (2012) Langmuir, Freundlich, Temkin and Dubinin—Radushkevich isotherms studies of equilibrium sorption of Zn 2+ onto phosphoric acid modified rice husk. J Appl Chem 3:38–45Google Scholar
- Kah M, Brown CD (2006) Adsorption of ionisable pesticides in soils. Rev Environ Contam Toxicol 188:149–217Google Scholar
- Sukul P, Spiteller M (2006) Sulfonamides in the environment as veterinary drugs. Rev Environ Contam Toxicol 187:67–101Google Scholar
- Zhang H, Weber EJ (2013) Identifying indicators of reactivity for chemical reductants in sediments. Environ Sci Technol 47:6959–6968Google Scholar