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, and the components and microstructures of the samples were examined by means of XRF, XRD and SEM. An aluminum extraction efficiency of 86.50% was achieved when the sintered pellets were leached using 4 mol·L-1 H2SO4 with solid/liquid ratio(m/V) of 1∶5 at 80 ℃ for 24 h. An iron extraction efficiency of 94.60% was achieved under the same condition for the maximum extraction efficiency of Al......
described a high-efficiency method for the determination of salicylaldoxime in water samples by liquid-liquid extraction (LLE) [28] prior to high performance liquid chromatography. Parameters... into the list in a comparative manner with previous results by HPLC method [27]. Another factor that may affect the extraction recovery and efficiency is the ionic strength in terms of salting-out effects [30, 31......
的影响规律.结果如图1所示. 图1 温度和时间对除铁率的影响 Fig. 1 Effect of temperature and time on iron removal efficiency 由图1可见,溶液中的除铁率随着反应时间延长和温度升高而逐渐升高,当反应时间为180 min时,4个温度(170,180,190,200 ℃)下的除铁率分别为91%,92%,92.6... on iron removal efficiency 由图4可见,随着Na2SO4浓度升高,除铁率逐渐增加,当Na2SO4浓度由0 mol/L升高到0.25 mol/L时,除铁率由91%提高至96.3%.除铁率升高与Fe2+的氧化能力密切相关,Na2SO4的加入会使体系中SO42-增多,溶液中会形成大量的FeSO4离子对,它的氧化能力远强于Fe2+,使更多的Fe2+氧化水解形成赤铁矿[10].又因同离......
and solvent extraction on recovery of Sc was investigated.The CaF2 can obviously improve the leaching efficiency of Sc and reduce the acid consumption.The leaching efficiency of Sc increases from 74...Extraction of scandium from red mud by acid leaching with CaF2 and solvent extraction with P507Xiaobo Zhu,Wang Li,Baolin Xing,Yude ZhangCollege of Chemistry and Chemical Engineering,Henan Polytechnic......
and solvent extraction on recovery of Sc was investigated.The CaF2 can obviously improve the leaching efficiency of Sc and reduce the acid consumption.The leaching efficiency of Sc increases from 74...Extraction of scandium from red mud by acid leaching with CaF2 and solvent extraction with P507Xiaobo Zhu,Wang Li,Baolin Xing,Yude ZhangCollege of Chemistry and Chemical Engineering,Henan Polytechnic......
]. Brine leaching with chloride solutions, such as NaCl, CaCl2 and FeCl3, is widely used in order to improve the extraction efficiency of Pb from the slag [13-14]. About 89% of Pb in a zinc plant residue...J. Cent. South Univ. (2012) 19: 1808-1812 DOI: 10.1007/s11771-012-1212-1 Extraction of metals from a zinc smelting slag using two-step procedure combining acid and ethylene diaminetetraacetic acid......
J. Cent. South Univ. Technol. (2011) 18: 627-632 DOI: 10.1007/s11771-011-0740-4 Plane extraction for navigation of humanoid robot ZHANG Tong(张彤)1, 2, XIAO Nan-Feng(肖南峰)1 1. School of Computer... and precision of algorithm can satisfy the demands of humanoid robot’s navigation. Key words: humanoid robot; navigation; line segments splitting; region growing; plane extraction; depth image 1......
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with extraction pH isotherms. The effect of experimental conditions on the removal efficiency of the metals was also evaluated, including the A/O ratio, extracting agent concentration... extraction distribution isotherm with 5% Mextral V10 and 5% Mextral 622H in DT100 and its McCabe-Thiele diagram The practical efficiency of the synergistic system was tested based on the data obtained from......
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