Kinetics and Adsorption Isotherms of Bisphenol A

Authors: Bruno B Cunha Wander Gustavo Botero Luciana Camargo Oliveira Viviane M Carlos Marcelo L M Pompêo Leonardo F Fraceto André H Rosa

Publish Date: 2011/06/22

Volume: 223, Issue: 1, Pages: 329-336

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Abstract

The sorption of four endocrine disruptors bisphenol A BPA estrone E1 17βestradiol E2 and 17αethinylestradiol EE2 in tropical sediment samples was studied in batch mode under different conditions of pH time and sediment amount Data obtained from sorption experiments using the endocrine disruptors EDs and sediments containing different amounts of organic matter showed that there was a greater interaction between the EDs and organic matter OM present in the sediment particularly at lower pH values The pseudosecond order kinetics model successfully explained the interaction between the EDs and the sediment samples The theoretical and experimentally obtained q e values were similar and k values were smaller for higher SOM contents The k F values obtained from the Freundlich isotherms varied in the ranges 42–74 × 10−2 higher OM sediment sample S2 and 17 × 10−3–31 × 10−2 lower OM sediment sample S1 the latter case indicating an interaction with the sediment that increased in the order EE2   E2  E1  BPA These results demonstrate that the availability of endocrine disruptors may be directly related to the presence of organic material in sediment samples Studies of this kind provide an important means of understanding the mobility transport and/or reactivity of this type of emergent contaminant in aquatic systems

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