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Magnesium peroxide
About: Magnesium peroxide is a research topic. Over the lifetime, 148 publications have been published within this topic receiving 1673 citations.
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12 Jun 2006
TL;DR: A history of Magnesite and Brucite can be found in this paper, where the authors discuss the use of Magnesium Oxide as a flame-retardant for Polymer Applications.
Abstract: Preface. Acknowledgments. 1 History of Magnesia. 1.1 History of Magnesia. 2 Formation and Occurrence of Magnesite and Brucite. 2.1 Introduction. 2.2 Sedimentary Magnesite-Basis for Carbonate Deposition. 2.3 Serpentine Alteration by Hydrothermal Processes. 2.4 Cryptocrystalline Magnesite Formation by Infiltration. 2.5 Crystalline Magnesite-Replacement of Limestone and Dolomite. 2.6 Brucite. 2.7 Worldwide Occurrence of Magnesite and Brucite. 2.8 Physical and Chemical Properties of Magnesite. 2.9 Chemical and Physical Properties of Brucite. 3 Synthetic Magnesia. 3.1 Introduction. 3.2 Composition of Seawater and Brines. 3.3 Process Description. 3.4 Calcination. 3.5 Grinding. 3.6 Packaging. 3.7 Sampling and Testing and In-Process Quality Control. 3.8 Aman Process. 3.9 General Properties of Synthetic Magnesia. 4 Mining and Processing Magnesite. 4.1 Mining Operations. 4.2 Processing Magnesite. 4.3 Gravity Concentration. 4.4 Tertiary Crushing. 4.5 Postcalcination Screening and Grinding. 5 Calcination of Magnesium Hydroxide and Carbonate. 5.1 Calcination of Magnesite. 5.2 Calcination of Magnesium Hydroxide. 6 Furnaces and Kilns. 6.1 Introduction. 6.2 Multiple-Hearth Furnaces. 6.3 Horizontal Rotary Kilns. 6.4 External Water Coolers. 6.5 Shaft Kilns. 7 Postcalcination Processing. 7.1 Introduction. 7.2 Grinding. 8 Physical and Chemical Properties of Magnesium Oxide. 8.1 Introduction. 8.2 Physical Properties of Magnesium Oxide. 8.3 Chemical Properties of Magnesium Oxide. 8.4 Surface Structures of MgO. 8.5 Molecular Adsorption on MgO. 9 Other Magnesia Products. 9.1 Production of Hard-Burned Magnesia. 9.2 Production of Dead-Burned Magnesia. 9.3 Fused Magnesia. 9.4 Magnesium Hydroxide Slurry. 9.5 Purification by Carbonation of Magnesium Hydroxide Slurry. 10 Water and Wastewater Applications for Magnesia Products. 10.1 Introduction to Applications. 10.2 Industrial Wastewater Treatment. 10.3 Advantages of Magnesium Hydroxide in Wastewater Treatment. 10.4 Adsorption of Dyes on Magnesium Hydroxide. 10.5 Biological Wastewater Treatment. 10.6 Bioflocculation and Solids Settling. 10.7 Phosphorus Removal from Wastewater and Struvite Formation. 10.8 Odor and Corrosion Control in Sanitary Collection Systems. 10.9 Acid Mine Drainage. 10.10 Silica Removal from Industrial Plant Water. 11 Magnesia in Polymer Applications. 11.1 Magnesium Hydroxide as a Flame Retardant for Polymer Applications. 11.2 Flame-Retardant Mechanisms. 11.3 Properties Required of Magnesium Hydroxide for Flame-Retardant Applications. 11.4 Novel Applications for Magnesium Hydroxide as a Flame Retardant. 11.5 Polymer Curing and Thickening. 12 Environmental Applications. 12.1 Flue Gas Desulfurization. 12.2 Regenerative Process. 12.3 Remediation Applications. 12.4 Nuclear Waste Disposal. 12.5 Hazardous Spill Cleanup. 12.6 Antibacterial Activity of Magnesium Oxide Powder. 12.7 Carbon Dioxide Sequestration Using Brucite. 13 Role of Magnesium in Animal, Plant, and Human Nutrition. 13.1 Role of Magnesium in Plant Nutrition. 13.2 Magnesium Fertilizers. 13.3 Magnesium in Animal Nutrition. 13.4 Magnesium in Human Health and Nutrition. 14 Magnesium Salts and Magnesium Metal. 14.1 Magnesium Acetate. 14.2 Magnesium Alkyls. 14.3 Magnesium Chloride. 14.4 Magnesium Nitrate. 14.5 Magnesium Sulfate. 14.6 Magnesium Soaps. 14.7 Magnesium Overbase Sulfonates. 14.8 Magnesium Peroxide. 14.9 Magnesium Metal Production. 15 Pulp Applications. 15.1 Sulfite Pulping. 15.2 Magnefite Pulping Process. 15.3 Pulp Bleaching. 15.4 Deinking. 16 Magnesia Cements. 16.1 Introduction. 16.2 Magnesium Oxychloride Cement. 16.3 Magnesium Oxysulfate (MOS) Cement. 16.4 Thermal Insulative and Fire Resistance Properties of Sorel Cement. 16.5 Magnesium Phosphate Cement. 17 Miscellaneous Magnesia Applications. 17.1 Sugar Manufacture. 17.2 Chrome Tanning of Leather. 17.3 Magnesia as a Catalyst Support. 17.4 Fuel Additives. 17.5 Well-Drilling Fluids. 17.6 Nanoparticulate Magnesia. 17.7 Transformer Steel Coating. Appendix. Index.
231 citations
TL;DR: In this article, the oxidation of ultra-thin Mg films supported on a Mo(100) surface has been studied using X-ray photoelectron spectroscopy (XPS) in the 90-1300 K sample temperature range.
212 citations
TL;DR: Calcium and magnesium peroxides were applied for the treatment of soil contaminated by polychlorinated biphenyls-containing electrical insulating oil and resulted in nearly complete oil removal, unsubstantial increase in soil pH and almost no changes in oxygen consumption and dehydrogenase activity, making it suitable for the soil decontamination.
70 citations
TL;DR: A permeable barrier system consisting of a line of closely spaced wclls was installed perpendicular to ground water flow to control the migration of a dissolved hydrocarhon plume as mentioned in this paper.
Abstract: A permeable barrier system. consisting of a line of closely spaced wclls. was installed perpendicular to ground water flow to control the migration of a dissolved hydrocarhon plume. The wells were charged wiih concrete briquets that release oxygen and nitrate at a controlled rate. enhancing aerobic bio-degradation in the downgradient aquifer.
Laboratory batch reactor experiments were conducted to identify concrete mixtures that slowly released oxygcn over an extended time period. Concretes prepared with urea hydrogen peroxide were unsatisfactory, while concretes prepared with calcium peroxide and a proprietary formalation of magnesium peroxide (ORC®) gradually released oxygen at a steadily declining rate. The 21 percent MgO2 conerete cylinders and briquets released oxygen at measurable rates for up to 300 days, while the 14 percent CaO2 briquets were exhausted by 100 days.
A full-scale permeable barrier system using ORC was constructed at a gasoline-spill site. During the first 242 days of operation. total BTFX decreased from 17 to 3.4 mg/L. and dissolved oxygen increased from 0.4 to 1.8 mg/L. during transport through the barrier. Over time, BTEX treatment efficiencies declined. indicating the barrier system had becomc less effective in releasing oxygen and nutrients to the highly contaminated portion of the aquifer. Point dilution tests and sediment analyses performed at the conclusion of the project indicated that ihc aquifer in the vicinity of the remediation wells had been clogged by precipitation with iron minerals. This clogging is believed to result from high pH from the concrete and oxygen released by ihc ORC. Oxygen-releasing permeable barriers and other aerobic bioremediation processes should be used with caution in aquifers with high levels of dissolved iron.
63 citations
TL;DR: In this article, three distinct radical species are formed and stabilized in the solid matrix upon the treatment of magnesium oxide with hydrogen peroxide in aqueous solution leading to the transformation of the solid into magnesium peroxide.
Abstract: Three distinct radical species are formed and stabilized in the solid matrix upon the treatment of magnesium oxide with hydrogen peroxide in aqueous solution leading to the transformation of the solid into magnesium peroxide. The species in question are the O 2 - superoxide radical ion, the O - radical ion, and the OH hydroxyl radical. The latter radical is characterized by orthorhombic g and A tensors whose principal values, due to the ionicity of the trapping matrix, are slightly different from those previously observed for OH in irradiated ice or similar systems. In comparison to the OH radical trapped in ice, the hydroxyl radical observed in the present case (as well as the two companion radicals) is stable up to 473 K
59 citations