title: Activation of Oxygen and Hydrogen Peroxide by Copper(II) Coupled with Hydroxylamine for Oxidation of Organic Contaminants.
abstract: This study reports that the combination of Cu(II) with hydroxylamine (HA) (referred to herein as Cu(II)/HA system) in situ generates H2O2 by reducing dissolved oxygen, subsequently producing reactive oxidants through the reaction of Cu(I) with H2O2. The external supply of H2O2 to the Cu(II)/HA system (i.e., the Cu(II)/H2O2/HA system) was found to further enhance the production of reactive oxidants. Both the Cu(II)/HA and Cu(II)/H2O2/HA systems effectively oxidized benzoate (BA) at pH between 4 and 8, yielding a hydroxylated product, p-hydroxybenzoate (pHBA). The addition of a radical scavenger, tert-butyl alcohol, inhibited the BA oxidation in both systems. However, electron paramagnetic resonance (EPR) spectroscopy analysis indicated that (•)OH was not produced under either acidic or neutral pH conditions, suggesting that the alternative oxidant, cupryl ion (Cu(III)), is likely a dominant oxidant.
authors.affiliation: Department of Chemical and Environmental Engineering, Yale University , New Haven, Connecticut 06511, United States.|School of Urban and Environmental Engineering, and KIST-UNIST-Ulsan Center for Convergent Materials (KUUC), Ulsan National Institute of Science and Technology (UNIST) , 50 UNIST-gil, Ulsan 44919, Republic of Korea.
authors.forename: Hongshin
authors.initials: H
authors.lastname: Lee
authors.affiliation: School of Urban and Environmental Engineering, and KIST-UNIST-Ulsan Center for Convergent Materials (KUUC), Ulsan National Institute of Science and Technology (UNIST) , 50 UNIST-gil, Ulsan 44919, Republic of Korea.
authors.forename: Hye-Jin
authors.initials: HJ
authors.lastname: Lee
authors.affiliation: School of Urban and Environmental Engineering, and KIST-UNIST-Ulsan Center for Convergent Materials (KUUC), Ulsan National Institute of Science and Technology (UNIST) , 50 UNIST-gil, Ulsan 44919, Republic of Korea.
authors.forename: Jiwon
authors.initials: J
authors.lastname: Seo
authors.affiliation: School of Urban and Environmental Engineering, and KIST-UNIST-Ulsan Center for Convergent Materials (KUUC), Ulsan National Institute of Science and Technology (UNIST) , 50 UNIST-gil, Ulsan 44919, Republic of Korea.
authors.forename: Hyung-Eun
authors.initials: HE
authors.lastname: Kim
authors.affiliation: Southeast Sea Fisheries Research Center, National Fisheries Research and Development Institute (NFRDI) , 397-68 Sanyangilju-ro, Tongyeong-si, Gyeongsangnam-do 53085, Republic of Korea.
authors.forename: Yun Kyung
authors.initials: YK
authors.lastname: Shin
authors.affiliation: Department of Chemical and Environmental Engineering, Yale University , New Haven, Connecticut 06511, United States.
authors.forename: Jae-Hong
authors.initials: JH
authors.lastname: Kim
authors.affiliation: School of Urban and Environmental Engineering, and KIST-UNIST-Ulsan Center for Convergent Materials (KUUC), Ulsan National Institute of Science and Technology (UNIST) , 50 UNIST-gil, Ulsan 44919, Republic of Korea.
authors.forename: Changha
authors.initials: C
authors.lastname: Lee
mesh_terms: D003300:Copper / Q000737:chemistry*; D004578:Electron Spin Resonance Spectroscopy; D006861:Hydrogen Peroxide / Q000737:chemistry*; D019811:Hydroxylamine; D006898:Hydroxylamines; D010084:Oxidation-Reduction; D010100:Oxygen
chemical_list: D006898:Hydroxylamines; D019811:Hydroxylamine; D003300:Copper; D006861:Hydrogen Peroxide; D010100:Oxygen