河北峰峰矿区煤中微量有害元素的赋存与分布  

Occurrence and Distribution of Minor Toxic Elements in Coals of Fengfeng Coalfield, Heibei Province, North China

作　　者：代世峰[1] 任德贻[1] 刘建荣[2] 李生盛[1] 

机构地区：[1]中国矿业大学煤炭资源教育部重点实验室,北京100083 [2]中国疾病预防控制中心环境与健康相关产品安全所,北京100021

出　　处：《中国矿业大学学报》2003年第4期358-362,共5页Journal of China University of Mining & Technology

基　　金：国家自然科学基金(40202014和40072054)

摘　　要：运用仪器中子活化分析、电离耦合等离子体原子发射光谱、带能谱仪的高分辨率扫描电镜以及逐级化学提取对河北峰峰矿区不同煤阶的煤中微量有害元素进行了测定,发现该矿区煤中微量有害元素含量均值与华北地台晚古生代煤的均值相比,As(3.21μg/g),Br(13.01μg/g),Co(6.21μg/g),Cu(31.29μg/g),Mo(3.63μg/g),Rb(7.73μg/g),Sn(9.60μg/g),W(1.62μg/g)等元素的含量偏高;该矿区不同变质程度煤中微量有害元素的含量不同,在明显受岩浆热液影响的无烟煤中As,Co,Cu,F,Fe,Mo,Ni,U,Zn含量较高;岩浆热液形成的方解石和黄铁矿脉是峰峰矿区无烟煤中Zn,As,Mo,Cu,Ni,Co等微量有害元素富集的主要载体。燃煤产物特别是飞灰中As(9.10μg/g),Co(10.55μg/g),Cr(58.18μg/g),Mo(13.95μg/g),Se(4.25μg/g),Th(34.50μg/g),U(7.65μg/g)的含量和原煤相比普遍较高,对它们的赋存状态及其对环境和人体健康的危害值得深入研究。The minor toxic elements in coals of Fengfeng Coalfield of Hebei Province, North China were determined using the instrumental neutron activation analysis (INAA), inductively-coupled plasma-atomic emission spectroscopy (ICP-AES), the scanning electron microscope fitted with an EDX analyzer (SEM-EDX) , and sequential chemical extraction. The study has revealed that the concentrations of elements, such as As (3. 21 μg/g), Br (13. 01 μg/g), Co (6. 21 μg/g), Cu (31. 29 μg/g), Mo (3. 63 μg/g), Rb(7. 73 μg/g), Sn (9. 60 μg/g), and W (1. 62 μg/g) are much higher than the arithmetic means of the Late Paleozoic coals from the North China Coal-accumulating Basin. Concentrations of As, Co, Cu, F, Fe, Mo, Ni, U, and Zn are higher in anthracite which is obviously influenced by the magmatic hydrothermal solution than those in the fat or coke coals. The magmatic hydrothermal solution is the main factor of the enrichment of Zn, As, Mo, Cu, Ni, and Co in coals. The occurrence and their effects on the environment and human health of elements in the fly ash, such as As (9. 10 μg/g), Co (10. 55 μg/g), Cr (58. 18 μg/g), Mo (13. 95 μg/g) , Se (4. 25 μg/g) , Th (34. 50 μg/g) , and U (7. 65 μg/g) are higher than that in raw coals.

关 键 词：河北峰峰矿区 煤 微量有害元素 岩浆热液 赋存状态 元素含量 

分 类 号：P618.11[天文地球—矿床学] P575[天文地球—地质学]