title: Photodegradation of gaseous acetaldehyde and methylene blue in aqueous solution with titanium dioxide-loaded activated carbon fiber polymer materials and aquatic plant ecotoxicity tests.
abstract: TiO2-supported activated carbon felts (TiO2-ACFTs) were prepared by dip coating of felts composed of activated carbon fibers (ACFs) with either polyester fibers (PS-A20) and/or a polyethylene pulp (PE-W15) in a TiO2 aqueous suspension followed by calcination at 250 °C for 1 h. The as-prepared TiO2-ACFTs with 29-35 wt.% TiO2 were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and N2 adsorption. The TiO2-ACFT(PS-A20) samples with 0 and 29 wt.% TiO2 were microporous with specific surface areas (S BET) of 996 and 738 m(2)/g, respectively, whereas the TiO2-ACFT(PE-W15) samples with 0 and 35 wt.% TiO2 were mesoporous with S BET of 826 and 586 m(2)/g, respectively. Adsorption and photocatalytic activity of the as-prepared samples were evaluated by measuring adsorption in the dark and photodegradation of gaseous acetaldehyde (AcH) and methylene blue (MB) in aqueous solution under UV light. The TiO2 loading caused a considerable decrease in the S BET and MB adsorption capacity along with an increase in MB photodegradation and AcH mineralization. Lemna minor was chosen as a representative aquatic plant for ecotoxicity tests measuring detoxification of water obtained from the MB photodegradation reaction with the TiO2-ACFT samples under UV light.
authors: Institute of General and Inorganic Chemistry, Uzbekistan Academy of Sciences, Mirzo Ulugbek Street 77A, Tashkent, 100170, Uzbekistan, zuhra_kadirova@yahoo.com.
authors: Zukhra C
authors: ZC
authors: Kadirova
authors: Mirabbos
authors: M
authors: Hojamberdiev
authors: Ken-ichi
authors: K
authors: Katsumata
authors: Toshihiro
authors: T
authors: Isobe
authors: Nobuhiro
authors: N
authors: Matsushita
authors: Akira
authors: A
authors: Nakajima
authors: Kiyoshi
authors: K
authors: Okada
mesh_terms: D000079:Acetaldehyde / Q000032:analysis* / Q000737:chemistry / Q000633:toxicity; D000327:Adsorption; D002244:Carbon / Q000737:chemistry*; D000077482:Carbon Fiber; D002606:Charcoal / Q000737:chemistry; D008751:Methylene Blue / Q000032:analysis* / Q000737:chemistry / Q000633:toxicity; D008956:Models, Chemical; D010782:Photolysis; D010944:Plants / Q000187:drug effects; D011108:Polymers / Q000737:chemistry*; D014025:Titanium / Q000737:chemistry*; D014466:Ultraviolet Rays; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000737:chemistry / Q000633:toxicity
chemical_list: D000077482:Carbon Fiber; D011108:Polymers; D014874:Water Pollutants, Chemical; C009495:titanium dioxide; D002606:Charcoal; D002244:Carbon; D014025:Titanium; D000079:Acetaldehyde; D008751:Methylene Blue