2 documents found, page 1 of 1
Marine macroalgae Pelvetia canaliculata (Linnaeus) as natural cation exchanger ...
Franciélle Girardi; Fabíola V. Hackbarth; Selene M. A. Guelli U. De Souza; Antônio Augusto U. De Souza; Rui A. R. Boaventura; Vítor J. P. VilarThe aim of this study was to investigate the cation exchange capacity of the macro-algae Pelvetia canaliculata (Linnaeus) for Cu2+ and Zn2+ removal from aqueous solutions in a batch system. Carboxylic and sulfonic groups present in the surface of the macroalgae are the main functional groups responsible by Cu2+ and Zn2+ removal. Tests with the raw algae showed that sodium, potassium, magnesium and calcium are e...
Benzene, toluene and o-xylene (BTX) removal from aqueous solutions through adso...
Fabíola V. Hackbarth; Vítor J. P. Vilar; Geerlesson B. De Souza; Selene M. A. Guelli U. De Souza; Antônio Augusto U. De SouzaIn this study, the monocomponent adsorption of benzene, toluene and o-xylene (BTX) compounds, as model contaminants present in the petrochemical wastewaters, was investigated using three types of adsorbents: activated carbon (Carbon CD 500), a polymeric resin (MN-202) and a modified clay (Claytone-40). Langmuir and Freundlich models were able to fit well the equilibrium experimental data. The BTX adsorption cap...