Coal, containing all the elements that are present in nature and more than 200 minerals, has
a complex chemical structure, making it one of the most complex geological materials …

Coal is a complex geologic material composed mainly of organic matter and mineral matter,
the latter including minerals, poorly crystalline mineraloids, and elements associated with …

A series of 20 coal samples were subjected to sequential leaching with ammonium acetate,
hydrochloric acid, hydrofluoric acid, and nitric acid to quantify the modes of occurrence of …

Coal, one of the most complex geological materials, consists of organic and mineral matter,
the latter including crystalline minerals, non-crystalline mineraloids, and elements with non …

Growing public awareness of the environmental impact of coal combustion has raised
serious concerns about the various hazardous trace elements produced by coal firing …

Trace elements such as mercury, arsenic and selenium present in coal are known to be of
concern for public health. Coal-fired power plants have resulted in emission of several tons …

Several important aspects are described in this paper. The occurrences of trace elements
(TEs) in coal are introduced. Four main groups of trace element content level, say,> 50, 10 …

Determination of arsenic species: A critical review of methods and applications, 2000–2003 -
Analyst (RSC Publishing) DOI:10.1039/B401321M Royal Society of Chemistry View PDF …

China's energy dependents on coal due to the abundance and low cost of coal. Coal
provides a secure and stable energy source in China. Over-dependence on coal results in …

The mechanisms of pyrite formation are reviewed. Advances since 1994 in our
understanding of the mechanisms and rate of pyrite formation, the role of bacteria in the …