Robert B. Finkelman

TL;DR: The background values of trace elements were dominated by sediment source regions in coal-bearing strata in China as mentioned in this paper, and the genetic types for trace-element enrichment of Chinese coals include source-rock- controlled, marine-environment-controlled, hydrothermal-fluid-controlled (including magmatic-, low-temperature-hydrothermalfluid-, and submarine-exhalation-controlled subtypes), groundwater-controlled and volcanic-ash-controlled.

TL;DR: The modes of occurrence of potentially hazardous elements in coal will be of significance in any attempt to reduce their mobilization due to coal combustion as mentioned in this paper, and it is anticipated that less than 50% of these elements will be routinely removed by conventional coal cleaning procedures.

TL;DR: The working hypothesis is that groundwater is leaching toxic organic compounds as it passes through the lignites and that these organics are then ingested by the local population contributing to this health problem.

TL;DR: In coal, inorganic constituents in coal commonly attract more attention and can ultimately determine how the coal will be used as mentioned in this paper, however, coal is composed predominantly of organic matter, while inorganic components in coal are composed mainly of inorganic organic matter.

TL;DR: A review of the genetic types and geochemical processes that have formed ‘metalliferous’ coals around the world is presented in this article, with an emphasis on elements in coal that are currently being extracted from coal as raw material (Ge and U) or have, in our opinion, the best chance for such use (REE, Ag, Au, and PGE).