Premium
Effects of Adding Charcoal During Dilute Acid Extraction of Manganese from Soils
Author(s) -
Gilliam J. W.,
Cox F. R.,
Reid P. H.
Publication year - 1968
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1968.03615995003200040026x
Subject(s) - charcoal , manganese , chemistry , extraction (chemistry) , zinc , copper , hydroquinone , soil water , solubility , inorganic chemistry , environmental chemistry , nuclear chemistry , chromatography , organic chemistry , soil science , geology
Addition of charcoal during extraction of soil with dilute HCl + H 2 SO 4 increased the amounts of manganese and iron extracted but had little or no effect on the copper, zinc, and aluminum extracted concurrently. Experiments indicated that the increase in extractable manganese due to the presence of charcoal was not a consequence of an increase in efficiency of extraction of reduced manganese already present but resulted from a reaction in which forms of manganese of low solubility were reduced and made soluble and in which CO 2 and CO were evolved. The amounts of manganese extracted from soils by dilute HCl + H 2 SO 4 in the presence of charcoal and by dilute HCl + H 2 SO 4 containing hydroquinone were highly correlated. The effect due to charcoal increased with the acidity of the extracting solution, the time of extraction, and the amount of charcoal added.