中文摘要：

以昭通（ZT）、小龙潭（XLT）和先锋（XF）三个地区的褐煤为原料进行腐植酸（humic acid,HA）的提取研究.以褐煤中腐植酸含量、腐植酸提取率及品质因素为分析指标,考察三种褐煤提取腐植酸的适用性.通过工业分析及酸性官能团含量的检测等手段对腐植酸的品质进行综合评价.结果表明,三种褐煤腐植酸提取率分别为76.13%,47.61%和43.48%.昭通褐煤腐植酸中灰分含量（16.83%）相对较高,小龙潭褐煤腐植酸和先锋褐煤腐植酸中灰分含量分别为6.66%和4.63%,且水分、挥发分和固定碳含量也相差较小.在腐植酸含氧官能团含量上,三种褐煤腐植酸的总酸性官能团含量及羧基含量相差较小,但昭通褐煤腐植酸提取残渣中含氧官能团含量远低于另外两种提取残渣.以上分析表明,昭通褐煤腐植酸提取较为完全,在腐植酸提取方面适用性更强.

英文摘要：

The humic acid（HA） extraction experiment was carried out with three regions lignite of Zhaotong（ZT）, Xiaolongtan（XLT） and Xianfeng（XF） as raw material. Factors such as content of humic acid in coal sample, yield of humie acid product and quality were the analytical indicators to investigate the adaptability of lignite. Comprehensive evaluation was conducted by the proximate analysis and content of oxygen-containing functional group. The experimental re- sults showed that yield of humic acid of three kinds of lignite were 76. 13%, 47. 61% and 43.48%, respectively and the proximate analysis indicated that the ash yield（16.83%） of humic acid product of Zhaotong lignite was relatively higher than the other two, which the ash yield was 6.66% and 4. 63%, respectively. For the oxygen-containing functional group in humic acid product, especially for the content of total acid group and carboxyl group, there was less difference among three kinds of lignite. But the content of functional group in extraction residue of Zhaotong lignite was far less than that in extraction residue of Xiaolongtan lignite and Xianfeng lignite, which meaned Zhaotong lignite was suitable for humic acid extraction.