Synthesis, Characterization and Use of Supported Co/gama-Al2O3 for the Removal of Reactive Blue 19 from Aqueous Solutions

Abstract

In this study, systematic adsorption tests were carried out using Co/gama-Al2O3 adsorbents of different compositions for removal of Reactive Blue 19 dye from aqueous solutions. The adsorbent was characterized by scanning electron microscopy, X-Ray powder diffraction, diffuse reflectance UV-visible spectroscopy and EDX analysis. The influences of several parameters such as pH, adsorbent concentration, adsorption time and dye concentration on the adsorption capacity of g-Al2O3 and Co/g-Al2O3 were investigated. The obtained results indicate that the adsorption is strongly dependent on the solution pH. The maximum adsorption capacity of the Reactive blue 19 dye onto Co/gama-Al2O3 takes place at around pH 2. The adsorption process is fast in the first minutes (95% from the amount of dye being removed after 6 minutes).

Photocatalytical Degradation of Congo Red Azo Dye Using Phosphono-Aminoacid-Cd(II) Pendant Groups Grafted on a Polymeric Support

“…Among the problematic dyes are the azo dyes, and of these, Congo Red (CR) is used extensively in textile industries [5,6]. The IUPAC name of CR dye is sodium salt of 3,3-([1,1-biphenyl]-4,4-diyl)bis(4-aminonaphthalene-1-sulfonic acid) with a molecular weight of 696.66 g mol -1 [5,7].…”

Facile Removal of Pesticides from Aqueous Solutions Using Magnetic Nanocomposites I. Synthesis and characterization of the adsorbent material

“…A significant part of pollutants escapes the current treatment methods and reach surface and ground waters; in order to enhance the processes to remove pollutants from waters nanotechnologies can be harnessed to solve critical development problems, including wastewater pollution. Several published studies describe different methods of degradation or removal pesticides from different classes, such as photocatalysis [2], ozonation [3], adsorption [4][5][6] or biodegradation [7].…”