Effect of Ethanol and Ultrasound Pretreatments on Pineapple Convective Drying.

Research Background: Drying represents a viable unit operation for the preservation of food. Convective drying is the most used method for plant materials. However, it can result in negative changes in food nutrient composition, and other quality parameters, besides requiring high energy consumption.

Degradation study of tris(2-butoxyethyl) phosphate with TiO immobilized on aluminum meshes employing artificial neural networks.

This work presents the study of tris(2-butoxyethyl) phosphate advanced oxidation in TiO-containing systems. Titania was immobilized on aluminum surfaces from recyclable materials and the results were compared with the suspension system. The initial concentration of photocatalyst and the oxidizing agent was optimized in a 2 experimental design and a kinetic study of the reactions was performed in the selected conditions.

Kinetic study of dye removal using TiO supported on polyethylene terephthalate by advanced oxidation processes through neural networks.

This work investigated the efficiency of polyethylene terephthalate (PET) as support material for TiO films in the photocatalytic degradation of red Bordeaux and yellow tartrazine dyes. The optimum operating conditions were determined by a factorial design, which resulted after 180 min of treatment in degradations of 99.5% and 99.

Use of TiO photocatalyst supported on residues of polystyrene packaging and its applicability on the removal of food dyes.

This work proposes the use of plastic residues, more specifically polystyrene packaging, to support TiO, used as a photocatalyst in the degradation of erythrosine and Brilliant Blue food dyes. The scanning electron microscopy and Fourier transform infrared spectroscopy analyses exhibited the surface coating and the presence of TiO in the material, respectively. The UV/HO/TiO process was used in the preliminary study, given the high percentage of degradation, operational advantages and greater reductions in peaks related to the aromatic rings when compared to the other processes studied.

Adsorption of azo dyes using peanut hull and orange peel: a comparative study.

This work proposes the use of agro-industrial wastes, specifically peanut hull (HP) and orange peel (OP), as adsorbents for dyes, such as Remazol Golden Yellow RNL-150% (RYG), Gray Reactive BF-2R (RG) and Reactive Turquoise Q-G125 (RT). Characterization by Brunauer-Emmett-Teller indicates that the adsorbents are mesoporous, with pHzpc values of 5.0 for HP and 4.