A method i:. described for the preparation of trace element reference materials by a co-precipitated gel technique. The technique is applied to the manu- facture of multi-element calibration standards for the analysis of geological materials by direct-reading emission spectrome…
Economic gold deposits may be considered to fall into four classes on the basis of the concentration and precipitation mechanism: (a) primary one-stage hydrothermal extraction. with precipitation in vein conduits or on the sea-floor, (b) hydrothermal leaching of materials which have undergone a prior Au enrichment (multistage)…
Hydrocracking is probably the most versatile of modern petroleum processes. This versatility has been achieved by the development of specific families of catalysts, of processing schemes designed to allow these catalysts to function efficiently and optimal refining relationships between hydrocraking and other refining processes.
The processing of concentrates of ilmenite and titanomagnetite in an induction-coupled plasma torch is decribed. A mixture of FeO and TiO2 was produced from ilmenite and a mixture of FeO, TiO2 and Fe2O3 from titanomagnetite. The result indicate that plasma proccesing of these minerals may be useful in indutrial applcations.
Interference effects in the determination of trace elements by atomatic-absorption spectrophotometry in applied geochemistry have been studied by a statistical appraisal and described in terms of a simple two-parameter mathematical model. The experimental design incorporated features that would allow possible deviations from the model to be detected…
Interpretation of regional geochemical survey data requires consideration of the effects of bedrock geochemistry, weathering and other secondary factors tending to modify the bedrock-soil-stream sediment relationship. Visual interpretation of complex multielement data may only serve to recognize the obvious
Dengan semakin berkembangnya sektor industri di dalam negeri, seperti industri kosmetik, industri cat, dan industri keramik, maka secara tidak langsung menunjukkan bahwa kebutuhan terhadap komoditas mineral talk ikut meningkat, baik sebagai bahan baku utama maupun penolong.
Walaupun data cadangan talk secara kuantitatif …
The expanding world fertilizer demand for phosphate rocks as .a primary source of phosphate fertilizers and the conti nuous utilization of the high-grade ores have stimulated efforts to beneficiate low-grade ores to minimize the impurities in phosphate concentrates for chemical processing. The basic neficiation technology of phosphate rock processin…
Air beserta surnber-sumbernya termasuk air bawah tanah merupakan salah satu kekayaan ~lam yang mutlak dibutuhkan manusia sepanjang hayatnya baik secara langsung atau tidak langsung, oleh karena itu dikuasai oleh negara dan dipergunakan sebesar-besarnya bagi kernakmuran rakyat. Pengambilan dan pemanfaatan air bawah tanah tersebut perlu dit…