河南省主要聚煤期煤中总汞及有机结合态汞的研究

Syudy on THg and orginic combined mercury in the main coal accumulating period in Henan province

以平顶山七矿和义马常村煤矿分别代表河南省中部和西部煤田,通过井下刻槽系统采集了主要聚煤期的原煤样品,分析了煤中的总汞、与腐殖酸和可溶有机质结合的有机结合态汞,结果表明：河南省煤中汞含量为51.0-229.9μg/kg,平均值为（120.2±51.3）μg/kg,低于其他省煤中的总汞,也低于美国煤中的汞;汞含量最高为肉眼明显可见风化黄铁矿的C一5＊煤段顶部,为424.5μg/kg,其次为C一5煤段下部和J2-3煤段,分别为（199.6±27.4）μg/kg和（229.9±30.3）μg/kg;煤中总汞与腐殖酸结合的汞、＂氯仿A＂中的汞有明显的正相关性,大部分煤样中与腐殖酸结合的汞占总汞50%以上,说明是煤中汞的主要赋存形态,可溶性有机质中汞含量较低,最高为溶解于四氢呋喃的＂BHg＂,为总汞的14%,＂氯仿A＂中的＂AHg＂最高不到总汞的7.7%。

Respectively taking 7th mine in Pingdingshan and Changchun coal mine in Yima as the central coal field and west coal field in Henan province,the raw coal samples were collected by using the channel method in the pit from the main coal forming period. The total mercury（ THg） and the mercury combined with humic acid（ HHg） and soluble organic matter（ BHg AHg） in the collected coal samples were analyzed. The results show that the mean THg in coal in Henan province is（ 120. 2 ± 51. 3） μg / kg,with range of 51. 0 -229. 9 μg / kg,which is lower than the THg in other provinces of China,and also lower than that of America.The highest THg is 424. 5μg / kg at the topic section of C 一5＊ with the visible weathered pyrite coal. The higher THg is the bottom section of C 一5and J2-3,with THg of（199. 6 ± 27. 4） μg /kg and（229. 9 ± 30. 3）μg /kg,respectively. The HHg and AHg have an obvious positive correlation with THg in coal,and the mercury combined with HHg is above 50% of the THg in most coal,which shows that HHg is the main occurrence of mercury in coal. The mercury content in soluble organic matter is lower,the highest for the BHg dissolved in tetrahydrofuran is 14% of THg,and AHg dissolved in chloroform is less than 7. 7% of the THg.