In this paper, the use of a clay residue as an adsorbent of the Remazol Black B (RB) and Remazol Red RB133 (RR) is studied. The residue is generated in a large amount on the Alluminum industry, especially the Arconic Alumínio S/A, Itapissuma, Pernambuco State. The thermally treated residue behavior was studied by performing a kinetic and equilibrium experiments. The variables evaluated in all experiments were the adsorption capacity (q) and adsorption efficiency (%). Adsorption experiments were performed at environmental conditions, with 50 mL of dye solution, with controlled steering speed, solution pH and adsorbent amount. In the kinetic studies was verified that for RB and RR, the system achieves the equilibrium state after 5 min. In the equilibrium, both reactive dyes obtained their maximum adsorption capacity (qm) with 1.0g of adsorbent and pH 4.0 and 6.5; with qm 0.98 mg·g-1 and 6.88 mg·g-1 for the RB and RR, respectively.
Synthesis of ferrate from ferrous sulfate using wet chemical approach and its application for remazol black B degradation: optimization and kinetic studies
