RETRACTED: Thermodynamics of the nickel, cobalt and zinc removal from ethanolic solution by p-aminobenzoic acid intercalated on layered calcium phosphate

This article has been retracted: please see Elsevier Policy on Article Withdrawal (http://www.elsevier.com/locate/withdrawalpolicy). This article has been retracted at the request of the Editors as recycling text and Figures 2 and 3b from previously published articles by the same authors has occurred. Also Figure 3a and 3b were assigned to different compounds although the SEM image in Figure 3a is just an enlarged view of Figure 3b. The other publications affected are:-AnalyticaChimicaActa 523 (2004) 89-95: http://dx.doi.org/10.1016/j.aca.2004.05.063-Journal of Chemical Thermodynamics 38 (2006) 130-135: http://dx.doi.org/10.1016/j.jct.2005.04.008-Solid State Sciences 10 (2008) 1139-1144: http://dx.doi.org/10.1016/j.solidstatesciences.2007.11.023-Materials Research Bulletin 47 (2012) 1539-1543: http://dx.doi.org/10.1016/j.materresbull.2012.02.024-Open Journal of Synthesis Theory and Applications 2 (2013) 1-7: http://dx.doi.org/10.4236/ojsta.2013.21001-Quimica Nova 36 (2013) 1170-1175: http://dx.doi.org/10.1590/S0100-40422013000800016