نتایج جستجو برای: karst bauxite
تعداد نتایج: 5428 فیلتر نتایج به سال:
Croatian bauxites are long known for their chemical and physical diversity arisen from characteristic origin emplacement within the area of Adriatic–Dinaric carbonate platform (ADCP). They include eight horizons spanning period between Upper Triassic (Carnian) Miocene, formed on subaerially exposed paleoenvironments. The bauxite genesis is recorded in geochemical composition as a unique signatu...
Cu/Ba/bauxite possesses superior NOx storage and reduction (NSR) performances, high thermal stability, strong resistance against SO₂ poisoning and outstanding regeneration ability in comparison with Pt/Ba/Al₂O₃. It can serve as a cheap and promising alternative for traditional Pt/Ba/Al₂O₃ in NOx removal from lean-burn engines.
The aim of this research was to study the flood pulse influence and the anthropic impact caused by bauxite tailings on the chemical composition of O. glumaepatula in Batata lake (PA, Brazil). Sampling was carried out in stands of O. glumaepatula in the low-water, filling, high-water, and drawdown periods in impacted and natural areas of Batata lake. During the low-water and drawdown periods the...
A review of case histories of reservoir-induced seismicity (RIS) in China shows that it mainly occurs in granitic and karst terranes. Seismicity in granitic terranes is mainly associated with pore pressure diffusion whereas in karst terranes the chemical effect of water appears to play a major role in triggering RIS. In view of the characteristic features of RIS in China, we can expect moderate...
The production of aluminum billetsdstarting from the conversion of bauxite to alumina, the processing of alumina to aluminum, and the final cast productdis studied using a Life Cycle Assessment (LCA) approach. The aluminum supply chain consists of a refinery, a smelter, and a casting plant. In the LCA model, the environmental loads of four different case scenarios were investigated. The scenari...
Lake Batata is a typical Amazonian clear water lake which has undergone anthropogenic impacts. Thirty percent of its total area has been covered with bauxite tailings. Thus, it is possible to distinguish two areas in this ecosystem: the impacted and the natural. The goal of this research was to study C, N, and P content variation and the values of biomass, length, density, and culm diameter of ...
In this study, bauxite/deionized water nanofluid was prepared by two-step method and its thermopyhsical properties were experimentally investigated. Bauxite milled high-energy spex-type ball milling attritor. nanoparticles with a size of 38 nm (2% weight) Sodium Dodecyl Benzene Sulfonate (0.5% doped into the deionized while preparing bauxite nanofluid. Ultrasonication applied for three hours to...
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