title: Optimisation of entrapped activated carbon conditions to remove coloured compounds from winery wastewaters.
abstract: The objective of this work was to study the entrapped conditions of activated carbon in calcium-alginate beads for the clarification of winery wastewaters. An incomplete 3(3) factorial design was carried out to study the efficiency of activated carbon (0.5-2%); sodium alginate (1-5%); and calcium chloride (0.050-0.900 M), on the following dependent variables: colour reduction at 280, 465, 530 and 665 nm. The activated carbon and calcium chloride were the most influential variables in the colour reduction. Nearly 100% colour reductions were found for the wavelengths assayed when employing 2% of activated carbon, 5% of sodium alginate and intermediate concentrations of calcium chloride (0.475 M). Instead, other conditions like, 2% of activated carbon, 4% of sodium alginate and 0.580 M of calcium chloride can also give absorbance reductions close to 100%.
authors.affiliation: Dpto. Ingeniería Química, E.T.S. Ingenieros Industriales, Campus As Lagoas, Marcosende, Universidad de Vigo, España, Spain. rosa.devesa.rey@uvigo.es
authors.forename: R
authors.initials: R
authors.lastname: Devesa-Rey
authors.forename: G
authors.initials: G
authors.lastname: Bustos
authors.forename: J M
authors.initials: JM
authors.lastname: Cruz
authors.forename: A B
authors.initials: AB
authors.lastname: Moldes
mesh_terms: D000042:Absorption; D002606:Charcoal / Q000737:chemistry*; D003116:Color; D008956:Models, Chemical; D012044:Regression Analysis; D013997:Time Factors; D014865:Waste Disposal, Fluid; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*; D014920:Wine
chemical_list: D014874:Water Pollutants, Chemical; D002606:Charcoal