title: Formulation of an alginate-vineyard pruning waste composite as a new eco-friendly adsorbent to remove micronutrients from agroindustrial effluents.
abstract: The cellulosic fraction of vineyard pruning waste (free of hemicellulosic sugars) was entrapped in calcium alginate beads and evaluated as an eco-friendly adsorbent for the removal of different nutrients and micronutrients (Mg, P, Zn, K, N-NH4, SO4, TN, TC and PO4) from an agroindustrial effluent (winery wastewater). Batch adsorption studies were performed by varying the amounts of cellulosic adsorbent (0.5-2%), sodium alginate (1-5%) and calcium chloride (0.05-0.9M) included in the biocomposite. The optimal formulation of the adsorbent composite varied depending on the target contaminant. Thus, for the adsorption of cationic contaminants (Mg, Zn, K, N-NH4 and TN), the best mixture comprised 5% sodium alginate, 0.05M calcium chloride and 0.5% cellulosic vineyard pruning waste, whereas for removal of anionic compounds (P, SO4 and PO4), the optimal mixture comprised 1% sodium alginate, 0.9M calcium chloride and 0.5% cellulosic vineyard pruning waste. To remove TC from the winery wastewater, the optimal mixture comprised 3% of sodium alginate, 0.475M calcium chloride and 0.5% cellulosic vineyard pruning waste.
authors.affiliation: Chemical Engineering Department, School of Industrial Engineering (EEI), University of Vigo, Campus As Lagoas-Marcosende, 36310 Vigo, Pontevedra, Spain.
authors.forename: X
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: R
authors.initials: R
authors.lastname: Devesa-Rey
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: A B
authors.initials: AB
authors.lastname: Moldes
authors.affiliation: Chemical Engineering Department, School of Industrial Engineering (EEI), University of Vigo, Campus As Lagoas-Marcosende, 36310 Vigo, Pontevedra, Spain.
authors.forename: J M
authors.initials: JM
authors.lastname: Cruz
mesh_terms: D000327:Adsorption; D000383:Agriculture / Q000379:methods*; D000464:Alginates / Q000737:chemistry*; D002122:Calcium Chloride / Q000737:chemistry; D002412:Cations / Q000737:chemistry; D020723:Glucuronic Acid / Q000737:chemistry; D006603:Hexuronic Acids / Q000737:chemistry; D008031:Lignin / Q000737:chemistry; D018977:Micronutrients / Q000737:chemistry*; D014865:Waste Disposal, Fluid / Q000379:methods*; D062065:Wastewater / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D000464:Alginates; D002122:Calcium Chloride; D002412:Cations; D020723:Glucuronic Acid; D006603:Hexuronic Acids; D008031:Lignin; D018977:Micronutrients; D062065:Wastewater; D014874:Water Pollutants, Chemical; C036909:lignocellulose
keywords: Adsorption; Agroindustrial wastewater; Alginate-vineyard pruning waste composite; Eco-friendly adsorbent; Micronutrients