title: Application of a hybrid system comprising carbon-doped TiO2 film and a ceramic media-packed biofilter for enhanced removal of gaseous styrene.
abstract: It is difficult to efficiently remove gaseous styrene using a TiO(2) film-coated photoreactor under UV light. Therefore, we used a hybrid system consisting of a carbon-doped TiO(2) (C-TiO(2)) film and a media-packed biofilter in order to enhance the removal efficiency (RE) of gaseous styrene compared to that of a pure (undoped) TiO(2) photoreactor. The C-TiO(2) was synthesized by a sol-gel combustion method, and its absorption spectrum was stronger that of pure (undoped) TiO(2) in the UV-vis range. The resultant RE of the C-TiO(2) film was 113-200% higher than that of the pure TiO(2) film. The initial RE of the photoreactor for input styrene concentrations of 630 mg m(-3), 420 mg m(-3), and 105 mg m(-3) was 20.6%, 29.8%, and 40.0%, respectively. When the biofilter was added, the RE increased to 93.3%, 97.9%, and 99.0%, respectively. Thus, application of the hybrid system consisting of both a photoreactor coated with a C-TiO(2) film and a biofilter is advantageous in terms of the removal efficiency of gaseous styrene.
authors.affiliation: Bio/Nano-Fusion Material Research Center, Sungkyunkwan University, Suwon 440-746, Republic of Korea.
authors.forename: Moon-Sun
authors.initials: MS
authors.lastname: Kim
authors.forename: Gang
authors.initials: G
authors.lastname: Liu
authors.forename: Hong-Kwan
authors.initials: HK
authors.lastname: Cho
authors.forename: Byung-Woo
authors.initials: BW
authors.lastname: Kim
mesh_terms: D002244:Carbon; D002516:Ceramics; D005374:Filtration / Q000295:instrumentation / Q000379:methods*; D005740:Gases; D008027:Light; D055668:Photochemical Processes; D020058:Styrene / Q000302:isolation & purification*; D014025:Titanium / Q000737:chemistry*
chemical_list: D005740:Gases; C009495:titanium dioxide; D020058:Styrene; D002244:Carbon; D014025:Titanium