title: [Adsorption of the TiO2 @ yeast composite microspheres for adsorbing Fluorescent Whitening Agent-VBL in fixed bed].
abstract: In this work, the adsorption potential of TiO2@ yeast composite microspheres to remove Fluorescent Whitening Agent-VBL (FWA-VBL) from aqueous solution was investigated using fixed-bed adsorption column. The effects of pH(2.0-8.0), bed height (1-3 cm), inlet concentration (20-80 mg x L(-1)) and feed flow rate (5-11 mL x min(-1)) on the breakthrough characteristics of the adsorption system were determined. The results showed that the highest bed capacity of 223.80 mg x g(-1) was obtained under the condition of pH 2.0, 80 mg x L(-1) inlet dye concentration, 1.0 cm bed height and 5 mL x min(-1) flow rate. The adsorption data were fitted to three well-established fixed-bed adsorption models, namely, BDST model, Thomas model and Yoon-Nelson model. The results fitted well to the three models with coefficients of correlation R2 > 0.980 in different conditions. The TiO2 @ yeast composite microspheres have desired regeneration ability and could be reused for four times.
authors.forename: Fei
authors.initials: F
authors.lastname: Wu
authors.forename: Kai-Qiang
authors.initials: KQ
authors.lastname: Zhang
authors.forename: Bo
authors.initials: B
authors.lastname: Bai
authors.forename: Hong-Lun
authors.initials: HL
authors.lastname: Wang
authors.forename: You-Rui
authors.initials: YR
authors.lastname: Suo
mesh_terms: D000327:Adsorption; D001555:Benzene Derivatives / Q000737:chemistry*; D057886:Bleaching Agents / Q000737:chemistry*; D008863:Microspheres; D008962:Models, Theoretical; D014025:Titanium / Q000737:chemistry*
chemical_list: D001555:Benzene Derivatives; D057886:Bleaching Agents; C517570:fluorescent whitening agent VBL; C009495:titanium dioxide; D014025:Titanium