title: Kinetic and morphology study of alginate-vineyard pruning waste biocomposite vs. non modified vineyard pruning waste for dye removal.
abstract: In this work a comparative bioadsorption study between a biocomposite consisting of hydrolysed vineyard pruning waste entrapped in calcium alginate spheres and non entrapped vineyard residue was carried out. Results have demonstrated that the biocomposite based on lignocellulose-calcium alginate spheres removed 77.3% of dyes, while non entrapped lignocellulose eliminated only removed 27.8% of colour compounds. The experimental data were fitted to several kinetic models (pseudo-first order, pseudo-second order, Chien-Clayton model, intraparticle diffusion model and Bangham model); being pseudo-second order the kinetic model that better described the adsorption of dyes onto both bioadsorbents. In addition, a morphological study (roughness and shape) of alginate-vineyard biocomposite was established under extreme conditions, observing significant differences between hydrated and dehydrated alginate-vineyard biocomposite. The techniques used to carry out this morphological study consisted of scanning electron microscopy (SEM), perfilometry and 3D surface analysis.
authors.affiliation: Chemical Engineering Department, School of Industrial Engineering (EEI), University of Vigo, Campus As Lagoas-Marcosende, 36310 Vigo-Pontevedra, Spain.
authors.forename: Xanel
authors.initials: X
authors.lastname: Vecino
authors.affiliation: Chemical Engineering Department, School of Industrial Engineering (EEI), University of Vigo, Campus As Lagoas-Marcosende, 36310 Vigo-Pontevedra, Spain; Defense University Center, Naval Academy, University of Vigo, Plaza de España 2, 36920 Marín-Pontevedra, Spain.
authors.forename: Rosa
authors.initials: R
authors.lastname: Devesa-Rey
authors.affiliation: Materials Engineering Department, School of Industrial Engineering (EEI), University of Vigo, Campus As Lagoas-Marcosende, 36310 Vigo, Pontevedra, Spain.
authors.forename: Salvador
authors.initials: S
authors.lastname: Villagrasa
authors.affiliation: Chemical Engineering Department, School of Industrial Engineering (EEI), University of Vigo, Campus As Lagoas-Marcosende, 36310 Vigo-Pontevedra, Spain.
authors.forename: Jose M
authors.initials: JM
authors.lastname: Cruz
authors.affiliation: Chemical Engineering Department, School of Industrial Engineering (EEI), University of Vigo, Campus As Lagoas-Marcosende, 36310 Vigo-Pontevedra, Spain. Electronic address: amoldes@uvigo.es.
authors.forename: Ana B
authors.initials: AB
authors.lastname: Moldes
mesh_terms: D000383:Agriculture; D000464:Alginates / Q000737:chemistry*; D004396:Coloring Agents / Q000737:chemistry*; D020723:Glucuronic Acid / Q000737:chemistry; D006603:Hexuronic Acids / Q000737:chemistry; D007220:Industrial Waste; D007700:Kinetics; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D000464:Alginates; D004396:Coloring Agents; D006603:Hexuronic Acids; D007220:Industrial Waste; D014874:Water Pollutants, Chemical; D020723:Glucuronic Acid
keywords: Dyes; Immobilized alginate-vineyard; Kinetic studies; Roughness; Spherical shape