EXTRACTION METHODS FOR METALS SUCH AS GOLD AND PLATINUM BY OXYGENIZING FINE GROWSThis invention relates to a process for obtaining metal values, typically base metals, platinum or gold from a feed material. In a first step of the process of the invention, feed material containing metal values ...
Results obtained in each fraction by both methods were statistically compared (P=0.95) for all the studied elements and no significant differences were found except for chromium and zinc in the third fraction (oxidisable). For all metals the extraction percentage was >95%. The proposed ...
Availability of Heavy Metals in Soils with Different Characteristics and Controversial Points for Analytical Methods of Soil Contamination in Korea This experiment was conducted to investigate available extraction capacity and potential mobility of heavy metal according to the distribution property and... G...
Methods for the extraction of metals such as rare earth metals and thorium from metal compounds and solutions. The methods may include the selective precipitation of rare earth elements from pregnant liquor solutions as rare earth oxalat... H Kasaini 被引量: 3发表: 0年 Process and system for...
The main objective of this study was to compare the effectiveness of different methods (heavy metals in pore water (PW), diffusive gradients in thin films (DGT), diethylene triamine pentaacetic acid (DTPA) extraction, and total heavy metals (THM) in soil) for the assessment of heavy metal bi...
Recent developments in dynamic extraction methods, which mimic natural scenarios more correctly than the batchwise counterparts, are presented in detail. 展开 关键词: biouptake biodegradation environmental exposure extraction fractionation metalloids metals organic pollutants sediments soils DOI: 10.1080/...
In the last few decades, several sequential extraction procedures have been developed, making it difficult to compare the results obtained by the different methods. Three extraction techniques (Tessier et al. 1979; Kersten and Frstner 1986; and the Bureau Communautaire de Référence...
No significant differences were found in the two first fractions (i.e. exchangeable and carbonate-bound), however, in the third and fourth extracts (i.e. Fe-Mn oxides-bound and organic matter-bound) the extraction capability of the two methods differed significantly. 展开 ...
The proposed method gave quantitative spike recoveries for all metals and was in excellent agreement with the certified results for CASS-3 marine reference seawater. Blanks and detection limits are in the low ppt range. The method gives a preconcentration factor of 72 for an 80-ml sample, ...