| Abstract |
| The isotherm sorption and sequential desorption of ibuprofen were investigated using wetland sediment with several conditions such as pH 3, 3% of salinity, and 1 M Na-citrate as a dissolved organic matter (DOM), and salinity on sorption and desorption of ibuprofen in water/sediment system. Two sorption models such as linear and Freundlich models and two desorption resistance models such as bi-phasic desorption model and its modified model were used to fit the experimental data. The linear and Freundlich models fitted well to the sorption data (R2>0.99) and the bi-phasic desorption model (BPDM) and the modified bi-phasic desorption model (MBPDM) also fitted well to the desorption data (R2>0.98). For sorption, KF in Freundlich model was estimated in order of 9.1 (3% salinity) > 7.4 (pH 3) > 4.8 (Na-citrate) in accordance to Kp in linear model. For desorption, both BPDM and MBPDM fitted well the sequential desorption experiments. The final desorption resistance were also positively affected by salinity but negatively influenced by the presence of Na-citrate as DOM. |
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| Key Words |
| Biphasic desorption model (BPDM), Dissolved organic matter (DOM), Ibuprofen, Modified biphasic desorption model (MBPDM), Salinity, Sequential desorption, Sorption |
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