College of Geoscience and Surveying Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China.
College of Geoscience and Surveying Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China.
Sci Total Environ. 2021 Feb 10;755(Pt 1):142527. doi: 10.1016/j.scitotenv.2020.142527. Epub 2020 Sep 24.
Harmful trace elements in coal have caused serious damage to the environment and human health. Understanding their spatial distribution is helpful for environmental health assessment and for their effective control and utilization. To further explore the geospatial distribution of harmful trace elements found in Chinese coals, this work constructed the Trace Elements in Chinese Coals Database Management System (TECC), and analysed the spatial distribution of harmful trace elements by applying spatial data algorithms and visual technology of WebGIS. The main results are as follows: (1) The mean concentrations of 25 harmful trace elements (Ag, As, B, Ba, Be, Cd, Cl, Co, Cr, Cu, F, Hg, Mn, Mo, Ni, P, Pb, Sb, Se, Sn, Th, Tl, U, V, Zn) in Chinese coals are provided, using the "reserve-concentration" weighted calculation method; (2) Using As, Hg, F, and U as examples, the spatial distribution of harmful trace elements in Chinese coalfields is visually displayed; (3) Harmful trace elements are extremely unevenly distributed in Chinese coalfields; they are mainly concentrated in south China, especially in the southwest region, and some elements may also be concentrated in coals from northwest, northeast, and north China. The enrichment of harmful trace elements in Chinese coals is the result of a combination of multiple factors, such as the nature of the region the coal is sourced from, sedimentary facies, coal-forming plants, and magmatic hydrothermal processes. This work can serve as a reference for the study of harmful trace elements in coal, including assessment of their environmental and health impacts.
煤炭中的有害微量元素对环境和人类健康造成了严重的损害。了解其空间分布情况有助于进行环境健康评估，并对其进行有效控制和利用。为了进一步探索中国煤炭中有害微量元素的地理空间分布，本研究构建了中国煤炭中微量元素数据库管理系统（TECC），并通过应用空间数据算法和 WebGIS 的可视化技术来分析有害微量元素的空间分布。主要结果如下：（1）采用“储量-浓度”加权计算方法，给出了中国煤炭中 25 种有害微量元素（Ag、As、B、Ba、Be、Cd、Cl、Co、Cr、Cu、F、Hg、Mn、Mo、Ni、P、Pb、Sb、Se、Sn、Th、Tl、U、V、Zn）的平均浓度；（2）以 As、Hg、F 和 U 为例，直观地展示了中国煤田中有害微量元素的空间分布；（3）中国煤田中有害微量元素的分布极不均匀，主要集中在中国南方，特别是西南地区，某些元素也可能集中在西北、东北和华北地区的煤炭中。中国煤炭中有害微量元素的富集是多种因素共同作用的结果，如煤炭产地的区域性质、沉积相、成煤植物和岩浆热液作用等。本研究可为煤炭中有害微量元素的研究提供参考，包括对其环境和健康影响的评估。
