title: A Novel Biosorbent Lagenaria vulgaris Shell - ZrO₂for the Removal of Textile Dye From Water.
abstract: A new biosorbent, abbreviated as LVB-ZrO₂, was synthesized by chemically modifying Lagenaria vulgaris shell with ZrO₂. The removal of textile dye RB19 from aqueous solution by LVB-ZrO₂was studied. Characterization by SEM, FTIR and XRD confirmed the chemical modification of the biomaterial, which showed significant improvement of removal efficiency compared with unmodified Lagenaria vulgaris shell. LVB-ZrO₂point of zero charge is 5.49. The biosorption process is highly pH dependent and the optimal pH is 2.0, at which complete dye removal was attained. The results are the best by a pseudo-second order kinetic model. The optimal adsorbent dosage is 4 mg/dm³.The RB19 biosorption follows the Langmuir isotherm model (R² = 0.9978), with the maximum sorption capacity of 75.12 mg/g. LVB-ZrO₂is a mechanically stable, easy to synthesize, cost-effective, biocompatible and environmentally-friendly biosorbent with the high potential for the removal of RB19 from aqueous solution.
authors.affiliation: Department of Chemistry, Faculty of Science and Mathematics, University of Niš, Višegradska 33, 18 000 Niš, Serbia.
authors.forename: Milica M
authors.initials: MM
authors.lastname: Petrović
authors.forename: Miljana D
authors.initials: MD
authors.lastname: Radović
authors.forename: Miloš M
authors.initials: MM
authors.lastname: Kostić
authors.forename: Jelena Z
authors.initials: JZ
authors.lastname: Mitrović
authors.forename: Danijela V
authors.initials: DV
authors.lastname: Bojić
authors.forename: Aleksandra R
authors.initials: AR
authors.lastname: Zarubica
authors.forename: Aleksandar Lj
authors.initials: ALj
authors.lastname: Bojić
mesh_terms: D000818:Animals; D004396:Coloring Agents / Q000737:chemistry*; D019662:Cucurbitaceae / Q000737:chemistry*; D007220:Industrial Waste / Q000032:analysis*; D008855:Microscopy, Electron, Scanning; D013783:Textile Industry; D014865:Waste Disposal, Fluid / Q000379:methods; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D015040:Zirconium / Q000737:chemistry*
chemical_list: D004396:Coloring Agents; D007220:Industrial Waste; D014874:Water Pollutants, Chemical; D015040:Zirconium; C028541:zirconium oxide