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液膜富集铀(Ⅵ)与水中痕量铀的测定 总被引:1,自引:0,他引:1
研究了分离、富集铀(Ⅵ)的最佳液膜组成,试验了Span80-TBP-CCl4-液体石蜡-HClO4液膜体系富集的最优条件。用本法富集水和工业废水中的痕量铀(Ⅵ),富集可达75倍以上。应用于测定水和废水样品中的痕量铀,相对标准偏差为2.1%,回收率为99.00%~99.85%。 相似文献
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研究了分离,富集铀(Ⅵ)的最佳液膜组成,试验了Span80-TBP-CCl4-液体石蜡-HClO4液膜体系富集最优条件,用本法富集水和工业废水的痕量铀(Ⅵ)富集可达75倍以上,应用于测定水和废水样品的痕量铀,相对标准偏差为2.1%,回收率为99.00%~99.85%。 相似文献
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用乳状液膜分离富集钾(1)与测定微量钾 总被引:1,自引:1,他引:0
用二苯并-18-冠-6为流动载体的乳状液膜体系,研究了钾(1)的迁移行为。实验结果表明,只有K+能与其它金属离子得到满意的分离。如大量的Na+,NH4+,Ni2+,Li+,Ca2+,Mg2+,Fe3+,Mo6+,Al3+,Cu2+,Co2+,Cd2+,Zn2+等,均不被迁移透过这乳状液膜。确定了最佳液膜体系的组成:二苯并-18-冠-6,表面活性剂LMS-1,四氯乙烯,苯甲酸甲酯和内相(pH4~6水溶液);分离富集钾(1)的最适宜实验条件。Roi=1∶1(油内比),Rew=20∶60(乳水比)。此法已用于富集和测定食盐、卤水和工业废水中的微量钾(1),其回收率为99.3%以上,相对标准偏差为3.6%以下,结果十分满意。 相似文献
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用乳状液膜从硫酸铵型浸出液中浓缩稀土 总被引:1,自引:0,他引:1
张瑞华 《稀有金属与硬质合金》1996,(4):12-16
在作者所做的"用乳状液膜从氯化钠型浸出液中浓缩稀土"的工作基础上,利用所获得的液膜体系和较佳工艺条件,继续进行了料液类型[即NaCl型和(NH4)2SO4型浸出液的比较实验]、NaAc用量、膜相中有无石蜡、膜回用等条件实验,获得了从(NH4)2SO4型浸出液中浓缩稀土的适用液膜体系N205-P507-煤油-HCl乳状液膜浓缩稀土的浓度达102g/L,稀土提取率达93%。 相似文献
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液膜法分离富集,测定钼中痕量铅 总被引:3,自引:0,他引:3
用2,6-二酮吡啶-18-王冠-6(2,6-DKP-18-Crowe-6)、SPAN80、Glycerol(丙三醇)、CCl4(Car-bontetra-Chloride)和内相(0.15mol/LNa4P2O7溶液)乳状液膜体系,研究了Pb2+的迁移行为。实验结果表明,8min内Pb2+的迁移率达99.4%以上,而在这种情况下,许多金属离子如Mo6+、Mo5+、W6+、Fe3+、Ni2+、Cr3+、Li+、∑RE3+、K+、Na+、Ca2+、Mg2+、Ba2+、Sr2+、Al3+、Zn2+、Cd2+和Co2+等,都不被迁移,只有Pb2+能从这些离子中满意地分离出来。该法已成功地用于分离富集、测定金属钼、钼精矿中痕量铅,相对标准偏差在4.2%以下,结果十分满意。 相似文献
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液膜分离富集、测定铟 总被引:10,自引:0,他引:10
用乳状液膜体系对铟进行分离富集,并研究了乳状液膜的稳定性、温度、铟的浓度、外相pH值、乳水比(Rew)、油内比(Roi)等因素对富集铟的影响。实验表明,在适宜的条件下,铟的富集率可达99.5%-100.4%。在此情况下,常见共存离子都不迁移透过此乳状液膜。此法已用于富集测定烟尘、复杂多金属矿石中的铟,结果满意。 相似文献
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用2,6-二酮吡啶-18-王冠-6(2-6-DKP-18-Crowe-6),SPAN80,S100N-I(中性油)和C2H2Cl4乳状液膜体系,研究了Pb62+的迁移行为。在适宜条件下,8min内Pb^2+的迁移率达99.5%以上,而而这种情况下,许多金属离子如Fe&3+,Ni^2+,Cr^3+,Li^+,∑RE^3+,K^+,Na^+,Ca^2+,Mg^2+,Ba62+,Sr^2+,Al^3+, 相似文献
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用乳状液膜从氯化钠型浸出液中浓缩稀土 总被引:1,自引:0,他引:1
张瑞华 《稀有金属与硬质合金》1995,(4):7-11
对乳状液膜从氯化钠型浸出液中浓缩稀土的工艺影响因素进行了考察。这些因素包括油肉比(Roi)、膜相中煤油和液体石蜡的比例、表面活性剂用量、内相酸度、料液中稀土浓度、水乳比(RWe),P507和P204的比较以及搅拌时间。通过实验,获得了乳状液膜浓缩稀土的适宜配方是N205-P507-煤油-液体石蜡-HCl以及较佳的操作条件,乳状液膜浓缩土稀土的浓度可达100g/L。稀土提取率可达94%。 相似文献
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本文作者应用液膜技术分离、富集水中和钢铁中的微量稀土并了其总量(ΣRE),研究了流动载体(P215)、表面活性剂(N113A)、膜的增强剂(液体石蜡)、膜溶剂(煤油)和内相解析剂(HCl)溶液等对液膜分离富集微量稀土的影响,建立了N113A、P215、液体石蜡、煤油和HCl溶液膜体系的最佳组成和最适宜的实验条件。富集后的溶液,用5-Br-PADAP分光光度法测定ΣRE。用本法富集微量稀土,富集倍数 相似文献
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<正>Minmetals Resources acquired the world’s largest copper mine under construction for USD5.85 billion.One after another,listed companies Jien Nickle,China Molybdenum and Chihong Zinc and Germanium raised money to get involved in overseas mining projects…SOEs and private enterprises are engaged in a frenzy of overseas mine purchasing.A reporter with Economic 相似文献
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正Judging from China’s copper consumption field,the biggest consumption unit is electric power,which accounts for 47%of total consumption;it is followed by light industry sector,including household electrical appliance,machinery,durable goods and hardware etc,which accounts for 22%of total consumption;followed by transportation field, 相似文献
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《China Nonferrous Metals Monthly》2014,(10)
正In 2013,the Central Geological Prospecting Fund(CGPF)Project newly discovered 15 ore fields,including 3 large above ore fields,and 5medium sized ore fields.The reporter learned from the recently published"Annual Report of Central Geological Prospecting Fund Project(2013)"that,from 2006 to 2013 the CGPF 相似文献
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《China Nonferrous Metals Monthly》2014,(10)
正This year,the investment growth rate of real estate industry continued to slow down,sold area of commercial housing also dropped significantly,which brought huge pressure to the domestic air conditioning manufactures.In the first half of the year,by relying on high growth in national financial expenditure,along with investment in public infrastructure 相似文献
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《China Nonferrous Metals Monthly》2014,(10)
正Kang Yi,Honorary Chairman of China Nonferrous Metals Industry Association,said recently at the Forum on Development of the Non-ferrous Metals Industry in Central and Western China held in Zhengzhou that,as more and more electrolytic aluminum factories in Xinjiang came into operation,the electrolytic aluminum output of Xinjiang had reached2,275,000 tons in the first 7 months this year, 相似文献
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《China Nonferrous Metals Monthly》2014,(12)
正"Xinjiang project has been completed according to schedule,but total completion and total start of production are two different concepts,after completion it still needs a gradual process of reaching production target."On the morning of November 3,Shenhuo Coal Industry and Electricity Power told investors the above statement on the investor interaction platform. 相似文献
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正The reporter learned from Guangdong Province Precious Metal Transaction Center that in 2013the Center maintained healthy development momentum,and had become the second largest precious metal transaction platform in China in terms of market size;currently Guangdong is quickening steps of financial innovation for the Center,aiming to build a transaction center with international core competitiveness. 相似文献
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正On May 22,Baotou Rare Earth Industry Cooperation Consultation MeetingProject Agreement-signing Ceremony was held in Ningbo,nearly 40 enterprises from Ningbo,Guangdong,Hunan,and Shanxi participated in project consultation.After multi-lateral communication,agreements were signed for a total of 7 rare earth projects successfully. 相似文献