Sorption and desorption of carbamazepine, naproxen and triclosan in a soil irrigated with raw wastewater: Estimation of the sorption parameters by considering the initial mass o
Por:
Duran-Alvarez, JC, Prado-Pano, B, Jimenez-Cisneros, B
Publicada:
1 jun 2012
Resumen:
In conventional sorption studies, the prior presence of contaminants in the soil is not considered when estimating the sorption parameters because this is only a transient state. However, this parameter should be considered in order to avoid the under/overestimation of the soil sorption capacity. In this study, the sorption of naproxen, carbamazepine and triclosan was determined in a wastewater irrigated soil, considering the initial mass of the compounds. Batch sorption-desorption tests were carried out at two soil depths (0-10 cm and 30-40 cm), using either 10 mM CaCl2 solution or untreated wastewater as the liquid phase. Data were satisfactorily fitted to the initial mass model. For the two soils, release of naproxen and carbamazepine was observed when the CaCl2 solution was used, but not in the soil/wastewater system. The compounds' release was higher in the topsoil than in the 30-40 cm soil. Sorption coefficients (K-d) for CaCl2 solution tests showed that in the topsoil, triclosan
Filiaciones:
Duran-Alvarez, JC:
Univ Nacl Autonoma Mexico, Inst Ingn, Mexico City 04510, DF, Mexico
Prado-Pano, B:
Univ Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, Mexico
Jimenez-Cisneros, B:
Univ Nacl Autonoma Mexico, Inst Ingn, Mexico City 04510, DF, Mexico
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