...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Fuel >Concentration and distribution of sixty-one elements in coals from DPR Korea
【24h】

Concentration and distribution of sixty-one elements in coals from DPR Korea

机译：韩国朝鲜民主主义人民共和国煤炭中六十一种元素的浓度和分布

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Fifty coal samples (28 anthracite and 22 lignites) were collected from both main and small coal mines in DPR Korea prioritized by resource distribution and coal production. The concentrations of 61 elements in 50 coal samples were determined by several multielement and element-specific techniques, including inductively coupled plasma atomic emission spectrometry (ICP-AES), and inductively coupled plasma mass spectrometry (ICP-MS), ion chromatogram (IC), cold-vapor atomic absorption spectrometry (CV-AAS), and hydride generation atomic absorption spectrometry (HGAAS). The ranges, arithmetic means and geometric means of concentrations of these elements are presented. A comparison with crustal abundances (Clarke values) shows that some potentially hazardous elements in the coals of DPR Korea are highly enriched Li, B, S, Cl, Zn, As, Se, Cd, Sn, Sb, W, Te, Hg, Ag, Pb, and La, Ce, Dy, Tm, Ge, Mo, Cs, Tl, Bi, Th and U are moderately enriched. A comparison of ranges and means of elemental concentrations in DPR Korea, Chinese, and world coals shows the ranges of most elements in DPR Korea coals are very close to the ranges of world coals. Arithmetic means of most elements in DPR Korea coals are close to that of American coals. Most elements arithmetic means are higher in Jurassic and Paleogene coals than coals of other ages. In DPR Korea coals, only seven elements in early Permian coals are higher than other periods: Li, Zn/Se, Cd, Hg, Pb, and Bi. Only five elements B, As, Sr, Mo, W in Neogene coals have arithmetic means higher than others. SiO_2 and Al_2O_3 in ashes are more than 70 percent except six samples. The correlation between ash yields and major elements from high to low is in the order of Si> Al>Ti>K>Mg>Fe>Na>Ca>P>S. Most elements have high positive correlation with ash (r>0.5) and show high inorganic affinity.
机译：从朝鲜民主主义人民共和国主要和小型煤矿中收集了五十个煤样（28个无烟煤和22个褐煤），并按资源分配和煤炭生产的优先顺序进行了采样。通过多种多元素和元素特定的技术确定了50个煤样品中61种元素的浓度，包括电感耦合等离子体原子发射光谱法（ICP-AES）和电感耦合等离子体质谱法（ICP-MS），离子色谱图（IC） ，冷蒸气原子吸收光谱法（CV-AAS）和氢化物发生原子吸收光谱法（HGAAS）。列出了这些元素的浓度范围，算术平均值和几何平均值。与地壳丰度（克拉克值）的比较表明，朝鲜民主主义人民共和国煤中一些潜在的有害元素是高度富集的锂，硼，硫，氯，锌，砷，硒，镉，锡，锑，钨，碲，汞， Ag，Pb和La，Ce，Dy，Tm，Ge，Mo，Cs，Tl，Bi，Th和U适度富集。通过对朝鲜民主主义人民共和国，中国和世界煤炭中元素浓度的范围和平均值进行比较，可以看出朝鲜民主主义人民共和国煤炭中大多数元素的范围与世界煤炭的范围非常接近。 DPR韩国煤炭中大多数元素的算术均值与美国煤炭接近。在侏罗纪和古近纪煤中，大多数元素的算术平均值均高于其他年龄的煤。在朝鲜民主主义人民共和国的煤中，二叠纪早期煤中只有七个元素比其他时期高：Li，Zn / Se，Cd，Hg，Pb和Bi。新近系煤中只有B，As，Sr，Mo，W五种元素的算术平均值高于其他元素。除六个样品外，灰烬中的SiO_2和Al_2O_3占70％以上。灰分产率与主要元素从高到低的相关性依次为：Si> Al> Ti> K> Mg> Fe> Na> Ca> P> S。大多数元素与灰分具有较高的正相关性（r> 0.5），并显示出较高的无机亲和力。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号