title: Adsorption and photodegradation kinetics of herbicide 2,4,5-trichlorophenoxyacetic acid with MgFeTi layered double hydroxides.
abstract: The calcined layered double hydroxides (cLDHs) Ti-doped and undoped MgFe for this study were prepared by co-precipitation method followed by calcination at 500 °C. The as-prepared samples were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Brunauer Emmett Teller (BET) and UV-Vis diffuse reflectance spectrum (DRS) techniques and tested for adsorption and photodegradation (including photocatalytic and photo-Fenton-like) of 2,4,5-trichlorophenoxyacetic acid (2,4,5-T) in aqueous solutions under visible light irradiation. In the range of studied operating conditions, the as-prepared samples exhibited excellent photo-Fenton-like activity, leading to more than 80-95% degradation of 2,4,5-T at initial concentration of 100 mg L(-1) with 4 g calcined LDHs per liter, was accomplished in 360 min, while 2,4,5-T half-life time was as short as 99-182 min. The kinetics of adsorption and photodegradation of 2,4,5-T were also discussed. These results offered a green, low cost and high efficiency photocatalyst for environmental remediation.
authors.affiliation: Department of Chemistry, Changwon National University, Changwon 641-773, South Korea; Institute of Chemical Technology, Vietnam Academy of Science and Technology, 01 Mac Dinh Chi, District 1, Ho Chi Minh City, Vietnam.
authors.forename: Thi Kim Phuong
authors.initials: TK
authors.lastname: Nguyen
authors.affiliation: Department of Chemistry, Changwon National University, Changwon 641-773, South Korea.
authors.forename: Min-wook
authors.initials: MW
authors.lastname: Beak
authors.affiliation: Department of Chemistry, Changwon National University, Changwon 641-773, South Korea; NhaTrang Institute of Technology Research and Application, Vietnam Academy of Science and Technology, 2 Hungvuong, NhaTrang, Vietnam.
authors.forename: Bui The
authors.initials: BT
authors.lastname: Huy
authors.affiliation: Department of Chemistry, Changwon National University, Changwon 641-773, South Korea. Electronic address: yilee@changwon.ac.kr.
authors.forename: Yong-Ill
authors.initials: YI
authors.lastname: Lee
mesh_terms: D015085:2,4,5-Trichlorophenoxyacetic Acid / Q000737:chemistry* / Q000528:radiation effects; D000327:Adsorption; D006540:Herbicides / Q000737:chemistry* / Q000528:radiation effects; D006878:Hydroxides / Q000737:chemistry*; D007501:Iron / Q000737:chemistry; D008274:Magnesium / Q000737:chemistry; D010782:Photolysis; D014025:Titanium / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000737:chemistry* / Q000528:radiation effects
chemical_list: D006540:Herbicides; D006878:Hydroxides; D014874:Water Pollutants, Chemical; D015085:2,4,5-Trichlorophenoxyacetic Acid; D014025:Titanium; D007501:Iron; D008274:Magnesium
keywords: 2,4,5-T; Degradation; Layered double hydroxides; Photocatalyst; Ti-doping