The Organic or Inorganic Affinity of Lanthanide Elements in Coal and Its Evolution——A Case Study of the Late Paleozoic 5 # Coal from Weibei
YANG Jian-ye
Abstract：There are different kinds of affinity to organic or inorganic matter for different kinds of trace elements in coal. In order to study this difference, the different evolution of organic affinity between light rare earth elements (LREE) and heavy ones (HREE) in the late Paleozoic coal of the 5 formation from Weibei coalfield were studied by anti-reasoning after acid treatment. The results show that LREE belongs to Ⅲ type dual nature element with more affinities to organic matter. HREE belongs to Ⅳ type with stronger affinity to organic matter and Ⅴ type with typical organic affinity one. The organic affinity index of LREE is positive correlation with its+3 valence, and the organic affinity increases with increasing of radii of ions. The organic affinity index of HREE is significant negative correlation with its+3 valence, and the organic affinity increases with decreasing of radii of ions.
Keywords：coalacid treatmentlanthanide elementorganic affinity index
Publication Date：2010-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)