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Remoção de corantes reactivos em efluentes têxteis simulados usando um adsorven...

Tese de mestr.. Engenharia Engenharia do Ambiente. Faculdade de Engenharia. Universidade do Porto. 2000

Eliminação de iões metálicos em solução aquosa por biossorção em macroalgas mar...

Tese de mestrado. Engenharia do Ambiente. Faculdade de Engenharia. Universidade do Porto, Instituto Politécnico do Porto. Instituto Superior de Engenharia. 2007

Accumulation and release of Pb(II) in aqueous solution by aquatic mosses (Fonti...

The uptake and release of Pb(II) by Fontinalis antipyretica was studied in laboratory, by exposing the plants to different lead concentrations for 144 h and 335 h contamination and decontamination periods, respectively. A first order kinetic model was fitted to the experimental data to determine the uptake and release constants, k1 and k2, and other relevant parameters. The metal accumulation capacity, at equil...

Treatment of groundwater contaminated by arsenic using iron oxides/hydroxides

Cr(III) uptake by marine algal biomass: equilibrium and kinetics

In this work, biosorption of trivalent chromium by the marine brown algae Sargassum muticum was 37 studied in a batch system. The effect of the solution pH on Cr(III) uptake by Sargassum was 38 investigated. Kinetics and equilibrium experiments were conducted at different pH values (3.0, 4.0 and 39 5.0). Equilibrium data are well described by the Langmuir and Langmuir-Freundlich isotherms and 40 kinetics follow...

Copper, nickel and zinc removal by peanut hulls: batch and column studies in mo...

The main goal of this research study was the removal of Cu(II), Ni(II) and Zn(II) from aqueous solutions using peanut hulls. This work was mainly focused on the following aspects: chemical characterization of the biosorbent, kinetic studies, study of the pH influence in mono-component systems, equilibrium isotherms and column studies, both in mono and tri-component systems, and with a real industrial effluent f...

Efeitos de pistas contextuais em língua de sinais sobre recordação livre e comp...

Dissertação (mestrado)—Universidade de Brasília, Instituto de Psicologia, Departamento de Processos Psicológicos Básicos, Programa de Pós-Graduação em Ciências do Comportamento, 2009. ; Este estudo investigou os efeitos de exposição do leitor surdo à pista contextual em língua de sinas (início, meio e final de texto narrativo) sobre a compreensão de questões de inferência. Participaram 40 surdos, com faixa e...

Arsenic removal using synthetic adsorbents : kinetics, equilibrium and column s...

Removal of Cd(II), Zn(II) and Pb(II) from aqueous solutions by brown marine mac...

Specific marine macro algae species abundant at the Portuguese coast (Laminaria hyperborea, Bifurcaria bifurcata, Sargassum muticum and Fucus spiralis) were shown to be effective for removing toxic metals (Cd(II), Zn(II) and Pb(II)) from aqueous solutions. The initial metal concentrations in solution were about 75–100 mg L−1. The observed biosorption capacities for cadmium, zinc and lead ions were in the ranges...

Removal of Cd(II), Zn(II) and Pb(II) from aqueous solutions by brown marine mac...

Specific marine macro algae species abundant at the Portuguese coast (Laminaria hiperborea, Bifurcaria bifurcata, Sargassum muticum and Fucus spiralis) were shown to be effective for removing toxic metals (Cd(II), Zn(II) and Pb(II)) from aqueous solutions. The initial metal concentrations in solution were about 75-100 mg L-1. The observed biosorption capacities for cadmium, zinc and lead ions were in the ranges...