Manganese component

The filter cake consists primarily of oxides and hydroxides of manganese and carbon compounds. A sulphuric acid plus hydrogen peroxide leach is used to dissolve all of the manganese components as sulphates. Metallic impurities and hydroxides are also dissolved. The sulphuric acid is provided from recycling lead acid batteries. Carbon and some of the remaining impurities from the manganese dioxide remain in suspension and are removed by filtration. 

Advanced composites and fiber-reinforced materials are used in sailcloth, speedboat, and other types of boat components, and leisure and commercial fishing gear. A ram id and polyethylene fibers are currentiy used in conveyer belts to collect valuable offshore minerals such as cobalt, uranium, and manganese. Constmction of oil-adsorbing fences made of high performance fabrics is being evaluated in Japan as well as the constmction of other pollution control textile materials for maritime use. For most marine uses, the textile materials must be resistant to biodeterioration and to a variety of aqueous pollutants and environmental conditions. 

The ash content is 0.2—0.5% by weight for temperate woods and 0.5—2.0% by weight for tropical woods. The principal elemental components of wood ash are calcium and potassium with lesser amounts of magnesium, sodium, manganese, and iron. Carbonate, phosphate, sUicate, oxalate, and sulfate are likely anions. Some woods, especiaUy from the tropics, contain significant amounts of sUica. 

Fig. 5. Cutaway view of typical R20 or "D"-size alkaline manganese battery showing components and the coiiesponding materials of constmction (8).

Carbides of the Iron Group Metals. The carbides of iron, nickel, cobalt, and manganese have lower melting points, lower hardness, and different stmctures than the hard metallic materials. Nonetheless, these carbides, particularly iron carbide and the double carbides with other transition metals, are of great technical importance as hardening components of alloy steels and cast iron. 

This short section attempts to bring together the range of metalloenzymes that are encountered in biodegradation and biotransformation. Fe is the most common component of enzymes, and is followed in freqnency by zinc and molybdennm, while some important enzymes contain nickel, copper, manganese, tnngsten, or vanadinm. 

Syn-sedimentary chemical deposits form by chemical and biochemical precipitation of valuable metal components carried in solution, concomitant with the formation of the enclosing sedimentary rock. The manner of such deposition depends on the concentration of the metal in the solvent, the solubility of the precipitating product, the solution chemistry, and the deposition environment. Iron, manganese, phosphorus, lead, zinc, sulfur and uranium are some of the elements that have formed economically valuable deposits by chemical precipitation during sedimentation. 

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