Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/70567
Type: Conference paper
Title: Observations of silicates in both retarding and accelerating the oxidation of pyritic sulfide in the soil environment
Author: Thomas, J.
Weber, P.
Smart, R.
Skinner, W.
Schumann, R.
Citation: 2008 Joint Meeting of The Geological Society of America, Soil Science Society of America, American Society of Agronomy, Crop Science Society of America, Gulf Coast Association of Geological Societies with the Gulf Coast Section of SEPM Houston, Texas
Issue Date: 2008
Conference Name: Geological Society of America Joint Annual Meeting (2008 : Houston, Texas)
Statement of
Responsibility: 
Joan E. Thomas, Paul Weber, Roger Smart, William Skinner and Russell Schumann
Abstract: The effects of acidic ground water are a major worldwide problem. Investigations under controlled laboratory conditions can aid in the understanding of factors controlling pH in the wider environment. SEM studies of field samples have shown the surface of pyrite particles covered with smaller clay particles, particularly mica. This armoring phenomenon has been induced in laboratory testing. The effects of acidic ground water are a major worldwide problem. Investigations under controlled laboratory conditions can aid in the understanding of factors controlling pH in the wider environment. SEM studies of field samples have shown the surface of pyrite particles covered with smaller clay particles, particularly mica. This armoring phenomenon has been induced in laboratory testing. Laboratory tests were also done to asses the ability of an alumino-silicate material (chloritic schist) to neutralize acidic leachate from earth with a high sulfidic pyrite content. The chloritic schist used had a significant Fe content. Testing with a layered column showed the material did indeed raise effluent pH compared with control column. In the column where the chloritic schist and the high sulfide material were mixed, some increase in pH, compared with the control column, was observed, but high levels of sulfate were measured in the effluent (compared with levels from the control column and the layered column). This implies increased oxidation of the pyrite.
Rights: © Copyright 2008 The Geological Society of America (GSA), all rights reserved.
RMID: 0020108600
Description (link): http://gsa.confex.com/gsa/2008AM/finalprogram/abstract_147945.htm
Appears in Collections:Chemical Engineering publications

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