Hydrogen peroxide treatment

The reaction catalyzed by superoxide dismutases is summarized in the following 

The inactivation of the enzyme is pH-dependent. At alkaline pH the SOD is more readily inhibited than at pH 7.0. Therefore, most of the investigations were carried out at or above pH 10.0. At these pH-values the equilibrium of the reaction  

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Although the turpentine is largely desulfurized in the stripping stage and again in the fractionation stages, many appHcations for a- and P-pinene requite further desulfurization. Such methods involve adsorption on carbon, hypochlorite treatment, hydrogen peroxide treatment, treatment with metals, or a combination of techniques (6—15). 

Nelieu S, L Kerhoas, J Einhorn (2000) Degradation of atrazine into ammeline by combined ozone/hydrogen peroxide treatment in water. Environ Sci Technol 34 430-437. 

Moraes, E.C., Keyse, S.M. and Tyrrell, R.M. (1990). Mutagenesis by hydrogen peroxide treatment of mammalian cells a molecular analysis. Carcinogenesis 11, 283-293. 

Mesitylene, production from acetone, 1 164 Mesityl oxide, 14 589-590 characteristics of, 16 337 hydrogenation, 16 337-338 hydrogen peroxide treatment of, 16 338 Z-menthol from, 24 520 production of, 16 336-337 production from acetone, 1 164, 174 Mesogenic diols, 25 460 Mesogenic molecules, solids of, 15 82 Mesogens, 24 53, 54 Mesomixing, 16 683 Mesomorphic behavior, 24 53-54 Mesomorphic phase transitions, 15 102 Mesomorphism, 15 81. See also Liquid crystalline materials Mesophase pitch-based carbon fiber, 26 734-735... 

Commercially viable systems for the decolorisation of spent dyebaths can be based on hydrogen peroxide treatment initiated by UV radiation. A representative selection of six disulphonated monoazo acid dyes and two disazo disulphonated types was exposed for various times in a pilot-scale photochemical reactor of this kind. The controlling parameters were dye structure, pH, peroxide dosage and UV light intensity [39]. In a wider survey of the response of various classes of dyes to the combination of UV radiation and hydrogen peroxide, viable candidates for further in-plant treatment trials were the water-soluble reactive, direct, acid and basic classes. On the other hand, water-insoluble colorants such as disperse and vat dyes did not appear to be viable [40]. 

Physicochemical treatment of pharmaceutical wastewater includes screening, equalization, neutralization/pH adjustment, coagulation/flocculation, sedimentation, adsorption, and ozone and hydrogen peroxide treatment. Detailed descriptions of the various physicochemical treatment processes are described in the following sections. 

Spencer, J.P.E., Jenner, A., Chimel, K., Aruoma, O.I., Cross, C.E., Wu, R. Halliwell, B. (1995) DNA strand breakage and base modification induced by hydrogen peroxide treatment of human respiratory tract epithelial cells. FEBS Lett., 374, 233-236... 

Farmer, VC. and Mitchell, B.D. (1963) Occurrence of oxalates in soil clays following hydrogen peroxide treatment. Soil Sci., 96, 221-229. 

Harada, Y. and Inoko, A. (1977) The oxidation products formed from soil organic matter by hydrogen peroxide treatment. Soil Sci. Plant Nutr., 23, 513-521. 

Pedit et al. [226] used a kinetic model for the scale-up of ozone/hydrogen peroxide oxidation of some volatile organochlorine compounds such as trichloroethylene and tetrachloroethylene. The kinetic model was applied to simulate the ozone/hydrogen peroxide treatment of these pollutants in a full-scale demonstration plant of the Los Angeles Department of Water and Power. The authors confirmed from the model that the reaction rate of the pollutant with ozone was several orders of magnitude lower than that with the hydroxyl radical. When considering that the natural organic matter acts as a promoter of hydroxyl radicals, the ozone utilization prediction was 81.2%, very close to the actual 88.4% experimentally observed. 

Watts RJ, Stanton PC. Process conditions for the total oxidation of hydrocarbons in the catalyzed hydrogen peroxide treatment of contaminated soils. WA-RD 337.1. Olympic, WA Washington State Department of Transportation, 1994. 

Rieche and Meister34 obtained bis(l-hydroxyethyl) peroxide (21) from 2 moles of acetaldehyde and 1 mole of hydrogen peroxide. Treatment of 21 with phosphorus pentoxide in ether followed by distillation gives 3,5-dimethyl-l,2,4-trioxolan (2,3-butylene ozonide) (22) as the distillate and dimeric butylene ozonide with a ten-membered ring structure (23) as the residue.23-34 Thermal decomposition of (23) at 60 to 80° in vacua yields polymeric ethylidene peroxide (25), 3,5,7-trimethyl-l,2,4,6-tetroxepan (mono-... 

I. Schuppe-Koistinen, P. Moldeus, T. Bergman, and I.A. Cotgreave, S-Thiolation of human endothelial cell glyceraldehyde-3-phosphate dehydrogenase after hydrogen peroxide treatment, Eur. J Biochem. 221 (1994) 1033-1037. 

US AEC, Catalyzed Hydrogen Peroxide Treatment of 2,4,6-Trinitrotoluene in Soils in Innovative Technology Demonstration, Evaluation and Transfer Activities, EY 96 Annual Report, Report No. SEIM-AEC-ET-CR-97013, pp. 77-78. US Army Environmental Center, Washington, DC, 1997. 

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