[an error occurred while processing this directive] 高校地质学报 2018, 24(4) 536- DOI:     ISSN: 1006-7493 CN: 32-1440/P

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本文关键词相关文章
汞同位素
非质量分馏
地球化学示踪
本文作者相关文章
李春辉
梁汉东*
曹庆一
施云云
PubMed
Article by Li C
Article by Liang H
Article by Cao Q
Article by Shi Y
煤汞同位素地球化学研究进展
李春辉,梁汉东*,曹庆一,施云云
摘要: 汞是煤中普遍存在的痕量元素,煤炭消耗总量之巨使燃煤成为全球汞污染主要来源之一。汞具有7种稳定同位素,
并且兼具质量分馏和非质量分馏效应,使通过汞同位素对涉煤汞污染源和汞迁移、转化示踪成为理想途径。煤中汞同位素
研究获得长足进展。第一,初步给出了世界11个产煤国煤中汞同位素δ202Hg的特征值及分布范围,为示踪环境介质汞的燃
煤源污染源创造了条件。第二,发现了原煤中汞存在奇数质量汞的非质量分馏效应(Δ199Hg≠0),有助于配合δ202Hg开展示
踪研究。第三,中国不同产煤地及不同成煤期原煤中汞同位素δ202Hg与Δ199Hg值已被测试,为中国开展煤源汞污染示踪研究
打下一定基础。进一步工作可能有待加强的4个方面:(1) 全球不同地域和时代煤中汞同位素数据库的不断补充、修正和
完善;(2) 煤炭生产遗存物,如残留煤和煤矸石等与气-水环境相互作用中的汞同位素问题;(3) 燃煤派生的且影响人类
健康的环境介质如大气细颗粒物(PM2.5) 的汞同位素问题;(4) 涉及煤火汞的迁移转化是复杂的,部分汞具有二次释放特
性,其中汞同位素问题仍是未知的。总之煤中汞及其关联的汞同位素研究方兴未艾。
关键词   汞同位素   非质量分馏   地球化学示踪  
Progresses on Mercury Isotopic Geochemistry of Coal
LI Chunhui , LIANG Handong*, CAO Qingyi, SHI Yunyun
Abstract: Mercury is one of the widespread trace elements in coal. The large amount of coal consumption makes it as a main source of
global mercury pollution. Seven kinds of stable isotopes, both mass-dependent fractionation (MDF) and mass-independent fractionation
(MIF), and significant variations in isotopic composition of the involved coal samples, make Hg isotope an ideal way to assess sources of
Hg pollution. Mercury isotope studies of coals have made significant progress over the past twenty years, which can be summarized as
follows. Firstly, δ202Hg value and its distribution of coals from 11 countries were preliminarily researched, which from the basis of
identifying coal Hg pollution source. Secondly, MIF was found in coals, which was beneficial to do tracing studies with δ202Hg. Thirdly, δ 202Hg and Δ199Hg values in different areas and geologic periods were preliminary determined in our country. Further work may focus on
the following areas: Mercury isotope database of coals from different areas and geologic periods in the world should be supplemented,
revised and perfect. Mercury isotopes changes associated with the interactions between gas-water environment and coal mining residues
such as coal gangue and residual coal should not be neglected. Mercury isotopes of coal combustion products such as atmospheric fine
particulate matter (PM2.5) should be studied. Migration and transformation of the coal fire surface mercury is complex because partial
mercury on the surface may become secondary mercury release. This fractionation process of mercury isotope will no doubt make it
difficult to trace the pollution source with mercury isotope studies. In a word, the study of mercury and mercury isotopes of coal is
burgeoning.
Keywords: coal   mercury isotopes   mass-independent isotope fractionation   geochemical tracer  
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