Identifying sources and processes of groundwater quality change in Recife metropolitan region (PE, Brazil): contribution of boron, strontium and water isotopes - Batista, Jonathan Carvalhaes; Bertrand, Guillaume; Martins, Veridiana Teixeira de Souza; Hirata, Ricardo; Cary, Lise; Petelet-Giraud, Emmanuelle; Bertolo, Reginaldo Antonio; Penoff, Jeane Glaucia Santos Martucci; Montenegro, Suzana; Aquilina, Luc (South American Symposium on Isotope Geology, 2014)