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Zinc concentrate with high gallium content is one of the main resources of gallium. The gallium presents in the form of isomorphism in tetrahedron coordination with sulfur in sphalerite. The research was to investigate the amenability of zinc concentrate with high gallium to pressure oxygen leaching. The particle size, sulfuric acid concentration, oxygen partial pressure, additive amount, and time...
Land use changes inevitably have impacts on travel costs and trip production. The impacts may be positive or negative to transportation users. Importantly, equity issues arise as the positive benefits and the negative ones may be unevenly distributed. This paper will propose an equity-based land use-transportation model, which examines the benefit distribution among transportation users as well as...
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