Chemistry is the experimental and theoretical study of materials on their properties at both the macroscopic and microscopic levels. 2854-16-2, Name is 1-Amino-2-methylpropan-2-ol, molecular formula is C4H11NO. In an article, author is Wang, Zhenkai,once mentioned of 2854-16-2, HPLC of Formula: C4H11NO.
Oxone activation by UVA-irradiated Fe-III-NTA complex: Efficacy, radicals formation and mechanism on crotamiton degradation
This study demonstrated an efficient activation of Oxone by ultraviolet light A-irradiated Fe-III-nitrilotriacetate complex to induce the generation of sulfate and hydroxyl radicals (i.e., SO4 center dot- and HO center dot) under initial neutral pH. The important parameters such as the solution pH, the molar ratio of nitrilotriacetate:Fe-III, the dosages of Oxone and Fe-III-nitrilotriacetate complex were evaluated in terms of the degradation kinetics of an emerging contaminant Crotamiton. The results indicated that fast degradation rates of crotamiton were achieved under initial circumneutral conditions (e.g., pH 5.0-7.0), with apparent rate constants at 0.0936-0.1287 min(-1) (the ultraviolet light fluence-based rate constants at 0.48-0.66 J(-1) cm(2)). In addition, the optimal molar ratio of nitrilotriacetate:Fe-III was determined as 1:1, larger ratios decreased the degradation rate of crotamiton due to the competition effect of nitrilotriacetate on SO4 center dot-. The suitable dosages of Oxone and Fe-III-nitrilotriacetate complex were determined as 0.5 mM and 0.1 mM, respectively. Under the given optimal conditions, more than 99% degradation efficiency of crotamiton was achieved at an ultraviolet light fluence of 3.90 J cm(-2), better than those results obtained by the activation of S2O82- and H2O2. The results of quenching tests (tert-butyl alcohol and 2-propanol as scavengers) suggested that SO4 center dot- and HO center dot contributed similar to 65% and 35% to the degradation of crotamiton, respectively. Furthermore, the identified intermediates includes hydroxy-crotamiton, dihydroxy-crotamiton, aldehyde-crotamiton, aldehyde-dihydroxy-crotamiton, N-ethyl-2,3-dihydroxy-N-(o-tolyl)butanamide, (E)-N-ethyl-N-phenylbut-2-enamide, 2-(ethylamino)benzaldehyde and/or 2-(o-tolylamino)acetaldehyde, and (E)-N-ethylbut-2-enamide. The results indicated that the SO4 center dot- preferentially attacked on the amide and methyl groups of crotamiton. This work provided insight into the efficacy, radicals formation and mechanism on the activation of Oxone by ultraviolet light A-irradiated FeIII-nitrilotriacetate complex, offering an alternative approach for advanced water treatment.
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