Laboratory weathering studies of coal refuse

Experimental Simulation of Long Term Weathering in Alkaline Bauxite Residue Tailings

“…Soxhlet extractors have been used to simulate weathering for a variety of geological materials [10][11][12][13][14]; however, the very fine texture of bauxite residue (median particle diameter 130 μm for bauxite residue used in this study; [15]) inhibited leaching. Furthermore, the Soxhlet extraction procedure is slow and labour intensive when conducting experiments at multiple temperatures to investigate reaction kinetics.…”

Acid mine drainage prevention, control and treatment technology development for the Stockett/Sand Coulee area. Topical report, March 1, 1995--March 31, 1996

“…Simulated laboratory weathering experiments will be performed using the modified soxhlet method Sullivan and Sobek 1982;Sullivan et al 1986a,b). This laboratory weathering method was chosen because the soxhlets establish acid-producing potentials in short time periods.…”

Acid Mine Drainage and Management of Eastern Oil Shale Resources and Associated Waste Products

“…The oxidation of pyrite in a natural environment is suggested by the following reactions (Stumm and Morgan 1981 Once these compounds are formed, Sullivan and Sobek ( 1982) have shown that sol uo le acidity in the form of ferric and ferrous iron will be released to solution. This is especially critical in evaluating the influence of geochemical weathering of iron sulfides prior to disposal .…”