摘要
伊犁盆地南缘乌库尔其地区铀矿化主要分布在中、下侏罗统水西沟群暗色含煤建造中,暗色含煤建造往往含有许多有机质,在有机质中与铀沉淀富集关系最密切的是腐殖酸(HA)。运用强碱配合焦磷酸盐对层间氧化带不同分带岩石中腐殖酸进行分离及提取实验,并在HF-HCl混酸处理下去除腐殖酸中硅酸盐杂质,降低样品灰分,达到纯化样品的目的。所提取的腐殖酸中含量高的元素是C、O、H,分别占53.74%、39.23%和4.03%,同时还含有较少量N、S。红外光谱分析表明,伊犁盆地可提取腐植酸的芳香度高、分子量大、腐殖化程度较低。此外腐殖酸中含有羧基、羟基、酚羟基、羰基等酸性官能团,使其具有较强的还原、络合和吸附能力,在铀的沉淀富集过程中起着非常重要的作用。
The uranium mineralization in the Wukuerqi area mainly occurs in the dark coal bearing formations of the Xishuigou Group, Middle-lower Jurassic, the south margin of the Yili Basin. There are many organic matters in the dark coal bearing formations, in which the humic acids （HAs） are most closely related to precipitation and enrich- ment of uranium. The humic acids were separated and extracted from different rock zones of interlayer oxidation zones, The HF-HCl mixed acid not only can remove silicate impurities from humic acids, but also can reduce ash contents of the samples, and such to achieve the purposes of purifying the samples. The obtained humic acid sam- ples contains mainly C, O and H, accounting for 53.74%, 39.23% and 4.03%, and a small amount of N, S, with high aromatic degree, big molecular weight and low degree of humification. Many acidic function groups, such as carboxyl, hydroxyl, phenolic hydroxyl, carbonyl, were found in the humic acid samples. The eduction, conplex- ation and adsorption of humic acids play important roles in precipitation and enrichment of uranium.
出处
《矿物岩石地球化学通报》
CAS
CSCD
北大核心
2013年第3期349-353,共5页
Bulletin of Mineralogy, Petrology and Geochemistry
关键词
腐殖酸
铀矿
伊犁盆地
humic acid
uranium deposit
Yili Basin
