Sorption of tributyltin onto a natural quartz sand

Philippe Behra , E. Lecarme-Theobald , Maïté Bueno (1) , J.-J. Ehrhardt (1)

1 LCABIE - Laboratoire de Chimie Analytique Bio-Inorganique et Environnement

The aim of this study is to understand the sorption of tributyltin (TBT) onto natural quartz sand by classical batch experiments and spectroscopic surface analyses. At pH<6, the major species of TBT is the cation TBT+. Due to the presence of both the cationic part and the butyl chains, TBT should present amphiphilic properties. For concentrations lower than 40 ?M, TBT sorption occurs as a homovalent 1:1 cation exchange between either H+ or Na+ and TBT+. The increasing affinity of TBT with respect to the different materials follows the series kaolinite?natural sand

Mots clés: Batch experiment; Hydrophobic interactions; Ionic exchange; Kaolinite; Quartz; Silica; Sorption; Tributyltin; XPS (X-ray photoelectron spectroscopy)

Domaines: Chimie analytique

Philippe Behra, E. Lecarme-Theobald, Maïté Bueno, J.-J. Ehrhardt. Sorption of tributyltin onto a natural quartz sand. Journal of Colloid and Interface Science, 2003, 263 (1), pp.4-12. ⟨10.1016/S0021-9797(03)00238-8⟩. ⟨hal-00291358⟩