The Chemistry of Coal Oxidation

Bacterial Oxidation of Pyritic Materials in Coal.

Applicability of the manometric method for studying the oxidation of pyritic material in the presence of bacteria has been demonstrated. Resting cells of Ferrobacillus ferrooxidans accelerated the oxidation of coal pyrites and coarsely crystalline marcasite, but were inactive on coarsely crystalline pyrite. Resting cells of Thiobacillus thiooxidans were inactive on all pyrites tested. Oxidation...

Oxidation of Coal: a Mechanistic Puzzle

A l l coa ls , o t h e r than a n t h r a c i t e s , tend t o be ve ry s e n s i t i v e t o o x i d a t i o n . Even exposure t o a i r a t ambient temperature causes d e t e r i o r a t i o n t o the e x t e n t t h a t p r o p e r t i e s such as s o l u b i l i t y , cak ing, f l u i d i t y , t a r y i e l d , e t c . , a re adverse ly a f f e c t e d . A l though the loss o f h e a t i n...

The Chemistry of Thiol Oxidation and Detection

The microbiology of coal. I. Bacterial oxidation of phenanthrene.

The simultaneous addition of phosphate with 2,4-D enhances the toxicity of the latter to A. vinelandii. This enhanced toxicity is related to the magnesium concentration of the environment. The microbiology of coal has received little attention by comparison with the large amount of research on petroleum. Coal is a much more complex organic material than petroleum and probably consists of conden...

Fenton chemistry. Amino acid oxidation.

The oxidation of amino acids by Fenton reagent (H2O2 + Fe(II] leads mainly to the formation of NH+4, alpha-ketoacids, CO2, oximes, and aldehydes or carboxylic acids containing one less carbon atom. Oxidation is almost completely dependent on the presence of bicarbonate ion and is stimulated by iron chelators at levels which are substoichiometric with respect to the iron concentration but is inh...