title: Adsorptive removal of fluoride from aqueous medium using a fixed bed column packed with Zr(IV) loaded dried orange juice residue.
abstract: The potential of the adsorbent prepared from DOJR marketed as cattle food in Japan was identified as an efficient and low cost adsorbent for fluoride using fixed bed column. DOJR was loaded with Zr(IV) ions to develop active adsorption sites for fluoride. Fluoride adsorption performance of column packed with Zr(IV) loaded DOJR was assessed under variable operating conditions such as Zr(IV) loading temperature, initial fluoride concentration, bed depth, initial pH, and flow rate. Breakthrough curve modeling showed that Thomas and bed depth service time (BDST) models were in good agreement with the experimental data. Application of adsorbent investigated in this study to the treatment of actual waste plating solution containing fluoride ion showed successful removal below acceptable standard in Japan using a fixed bed column, hence, Zr(IV)-DOJR can be expected to be a promising candidate for the treatment waste water containing trace amount of fluoride ion in fixed bed column.
authors.affiliation: Department of Applied Chemistry, Saga University, Honjo 1, Saga 840-8502, Japan.
authors.forename: Hari
authors.initials: H
authors.lastname: Paudyal
authors.affiliation: Department of Applied Chemistry, Saga University, Honjo 1, Saga 840-8502, Japan.
authors.forename: Bimala
authors.initials: B
authors.lastname: Pangeni
authors.affiliation: Department of Applied Chemistry, Saga University, Honjo 1, Saga 840-8502, Japan. Electronic address: inoue@elechem.chem.saga-u.ac.jp.
authors.forename: Katsutoshi
authors.initials: K
authors.lastname: Inoue
authors.affiliation: Department of Applied Chemistry, Saga University, Honjo 1, Saga 840-8502, Japan.
authors.forename: Hidetaka
authors.initials: H
authors.lastname: Kawakita
authors.affiliation: Department of Applied Chemistry, Saga University, Honjo 1, Saga 840-8502, Japan.
authors.forename: Keisuke
authors.initials: K
authors.lastname: Ohto
authors.affiliation: Faculty of Engineering and Applied Science, Memorial University, St. John's, NL A1B 3X5, Canada.
authors.forename: Shafiq
authors.initials: S
authors.lastname: Alam
mesh_terms: D000327:Adsorption; D000821:Animal Feed; D001628:Beverages; D018533:Biomass; D002957:Citrus; D005459:Fluorides / Q000032:analysis* / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D011108:Polymers / Q000737:chemistry; D013696:Temperature; D013997:Time Factors; D062065:Wastewater; D014867:Water / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis*; D018508:Water Purification / Q000379:methods*; D015040:Zirconium / Q000737:chemistry*
chemical_list: D005459:Fluorides; D011108:Polymers; D062065:Wastewater; D014867:Water; D014874:Water Pollutants, Chemical; D015040:Zirconium
keywords: Adsorptive removal; Dried orange juice residue; Fixed bed column; Fluoride; Zr(IV) ion