Erratum to “Opposing behaviour of organic compounds” at different interfaces. [Atmos. Environ. 42 (2008) 7520–7529]

Enhanced metal adsorption on solid suspensions by organic molecules

“…The experimental effects observed in the present study cannot be radically different from the ones observed in simpler, but veryclose-by-nature systems, like carbofuran-water/silica [36,37] or PbNO 3 -carbofuran-water/silica [21,23,24]. The most striking effect is the enhancement of ionic physical adsorption by the coadsorption of salt and organic molecules (Fig.…”

“…It shows than the previous value (about 10 À9 mol m À2 ) is higher than the one for carbofuran, whose adsorption is always slightly negative: the surface layer is less concentrated than the bulk, which is no longer true for naphthalene. The weakness of the adsorption of these carbon-very-rich molecules can be attributed to the water layer characterizing the silica surface [37,24]; this will be discussed later. Concerning the adsorption of Pb 2+ onto two pure silicas with different characteristics (Fig.…”

“…[23] for the essential, and with a more elaborated theoretical discussion in Ref. [24]. More details about the surface behavior of carbofuran are available in Refs.…”

“…However, the theoretical basis of this analysis is applicable to any kind of interfaces, since it is an electrostatic calculation further to the discontinuity in the dielectric constant between two different media [22,21]; one should note that some aspects of this calculation are recalled in Section 3.5. Then, the feeling that it was worth examining other possible interfaces drove us to investigate, more recently, the adsorption of carbofuran used to roughly mimic a sandy soil such as the sand from Fontainebleau [23,24]. Indeed, there are more and more situations where both types of pollutants (organic pesticides and metallic salts) are present together at interfaces of any kind.…”

“…Moreover, theoretical analyses about this type of scattering were based on the same compounds [40,26]. This complex case-study is also a good opportunity to test the modified Wagner-OnsagerSamaras (WOS) model [41,42] elaborated within our group [21,24] to explain the effects of coadsorption on the behavior of ions, at first at the solution/air interface [21], and then at the silica/solution interface [24].…”