Metal Elements Geochemistry Properties And Analytical Methods Of Germanium Of Lignite In Xilinguole League Germanium Deposit

Foresee germanium will act as more and more important role in the advanced science and technology field in the future because of its wide-ranging optical properties and chemical catalyst properties, therefore, the super-large germanium deposit paragenesis with lignite discovered in Xilinguole League, Inner Mongolia has received considerable attention. Some base researches was done in this article in order to carry out ail-roundly work of generalized exploitation and utilization of lignite in Xilinguole League germanium deposit henceforth.(i) Distribution and enrichment of metal elements of lignite in Xilinguole League germanium was investigated with qualitative and half-quantitative X-ray fluorescence spectrometric (XRF) method, and the results indicate that Ge, W, As, Cd enrich obviously and other elements want comparing with Clarke value. The research deduces that Ge mainly came from granites in the basement of the sedimentary basin.(ii) Two kinds of new determination methods of germanium in Xilinguole League lignite were established. The first kind of method was fluorescence quenching method with 5' -nitro-salicylfluo -rone-TritonX-100, and fluorescence spectrum of determination system was studied, condition of experimentation was searched out as well. In the optimal conditions, germanium in Xilinguole League lignite could be directly determined in the present of masking reagents. The method is simple, utility, sensitive, selective and accurate. The second kind of method was inductively coupled plasma atom emission spectrometric (ICP-AES) methods, minor germanium and major ash forming metal elements Fe, Al, Ca, Mg, K, Na, Ti in lignite could be simultaneous determined using a new type of ICP instrument equipped with a dual-view plasma torch and detectors that cover nearly all spectra at the same time. In the experimentation, the operation condition of the instrument was optimized, analytical wavelength lack of interference from elements in the sample matrix was selected, and the spectral background was automaticly eliminated. The obtained coal ashes were dissolved in mixtures of nitric acid, hydrofluoric acid and perchloric acid after coal samples were cinerated. The analytical results were in good agreement with those provided by national standard methods. The method offers such distinctive advantages as fast, sensitive, effective, wide dynamic range and multi-element capabilities.(iii) The speciation of Ge and major ash forming metal elements Fe, Al, Ca, Mg, K, Na, Ti in Xilinguole League lignite was investigated using modified Querol five-step sequential chemical extraction procedures. The extraction sequence was as follows: (a)water-extractable; (b)readily exchangeable ions; (c)carbonate-bound, surface oxide-bound ions; (d)organically and sulfide-bound ions; (e)residual. The results of the extraction can offer theoretical basis and data in order to rationally select craft of extracting germanium. The results of this experiment show germanium mainly exists in form of organically and sulfide-bound ions in Xiliguole League lignite.