摘要
利用高效液相色谱法对4种低阶煤的二氯甲烷萃取液中多环芳烃PAHs(美国环保总署确定的16种PAHs)的含量及分布进行了研究,探讨了PAHs的分布与煤种、煤质参数之间的关系。结果表明:4种原煤中PAHs分布均以3环、4环、5环芳烃为主,其中4环芳烃最多。PAHs种类主要包括3环的苊、4环的苯并(a)蒽、芘、荧蒽以及5环的苯并(b)荧蒽。随碳含量增加,原煤中PAHs总含量总体呈现增加的趋势,在碳质量分数76.98%～81.85%时显著增加;随着氢碳物质的量比的减小,PAHs的总含量增加,但低环芳烃的含量相对减小,在氢碳物质的量比小于0.81时,PAHs总含量急剧下降;随着氧碳物质的量比增高,PAHs总含量减小;在氧碳物质的量比为0.10～0.21时,PAHs总含量呈现先明显降低后缓慢增加的趋势;PAHs总含量在挥发分41.01%～43.32%时急剧减少,在43.32%～46.06%时变化趋势平缓且含量相对较低。
The high efficient liquid chromatography was applied to study the content and distribution of the Polycyclic Aromatic Hydrocar-bons（PAHs） of the CH2Cl2 extraction solution from the four different low rank coals.The relationship between the distribution and the coal type as well as the coal quality parameters was discussed.The results showed that the distribution of PAHs in the four raw coals would mainly be the three cyclic aromatic hydrocarbons,four cyclic aromatic hydrocarbons and five cyclic aromatic hydrocarbons and mostly would be the four cyclic aromatic hydrocarbons.The types of PAHs would mainly be including the three cyclic acenaphthene,four cyclic benzene（a） anthracene,pyrene,fluoranthene and five cyclic benzene（b） fluoranthene.With the carbon content increased,the total content of PAHs in the raw coal would be in a increasing tendency and would be increased obviously when the carbon quality fraction was 76.98% ～ 81.85%.With the reduction of the n（H） ∶ n（C）,the total content of PAHs would be increased,but the content of the low cyclic aromatic hydrocarbons would be relatively reduced.When the n（H） ∶ n（C） was lower than 0.81,the total content of PAHs would be rapidly reduced.The higher the n（O） ∶ n（C） was,the lower the total content of PAHs would be.When the n（O） ∶ n（C） was 0.10 ～ 0.21,the total content of PAHs would be reduced obviously in the initial period and would be slowly increased in the later period.When the volatile matter was 41.01% ～ 43.32%,the total content of PAHs would be rapidly reduced.When the volatile matter was 43.32% ～ 46.06%,the total content of PAHs would be varied steadily and the content would be relatively low.
出处
《煤炭科学技术》
CAS
北大核心
2010年第11期120-124,共5页
Coal Science and Technology
基金
国家自然科学基金资助项目(50876112)
中国矿业大学(北京)"大学生创新性实验计划"资助项目(091207Z)
中央高校科研业务专项基金资助项目(2009QH13)
关键词
多环芳烃(PAHs)
PAHs含量
分布特征
低阶煤
Polycyclic Aromatic Hydrocarbons
content of Polycyclic Aromatic Hydrocarbons
distribution features
low rank coal
