title: Effect of pH and coexisting anions on removal of phosphate from aqueous solutions by inorganic-based mesostructures.
abstract: This study investigated the effect of pH and the presence of coexisting (competitive) anions on the removal of phosphate by titanium mesostructures synthesized using do- or hexadecyltrimethylammonium bromide. To address these research objectives, experiments were conducted (1) under controlled initial pH values (2 to 10); and (2) through injection of nitrate, fluoride, chloride, or sulfate anions into a phosphate solution. Based on the experimental results, an initial of pH of 2 was found to be optimal for use of titanium mesostructures. The presence of fluoride anions in solution significantly decreased the removal efficiency of phosphate removal (3.56% at 3.95 mg/g). However, the addition of nitrate, chloride, and sulfate anions did not affect phosphate removal.
authors.affiliation: Center for Water Resource Cycle Research, Korea Institute of Science and Technology, Seoul, Republic of Korea.
authors.forename: Jae-Woo
authors.initials: JW
authors.lastname: Choi
authors.forename: Yong-Soo
authors.initials: YS
authors.lastname: Choi
authors.forename: Seok-Won
authors.initials: SW
authors.lastname: Hong
authors.forename: Dong-Ju
authors.initials: DJ
authors.lastname: Kim
authors.forename: Sang-Hyup
authors.initials: SH
authors.lastname: Lee
mesh_terms: D000838:Anions / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D010710:Phosphates / Q000737:chemistry*; D014025:Titanium / Q000737:chemistry; D014865:Waste Disposal, Fluid / Q000379:methods; D018508:Water Purification / Q000379:methods*
chemical_list: D000838:Anions; D010710:Phosphates; D014025:Titanium