|
<br />'~,~ CORE LABORA~ORlES
<br />wreecs~, s-rbs
<br />Intarneitbr~nl
<br />a uro~ a...
<br />HUMIDITY CELL TESTS
<br />t METHODS (cont.)
<br />OPERATING SPECIFICATIONS
<br />Air flow is maintained through each cell at 5 to 8 liters per
<br />minute during both dry and humidified periods. Hose clamps are
<br />' utilized to aid in equalizing flow rates. During the humidified time
<br />period (3 days), approximately 110-150 mis of vaporized water pass
<br />through each cell. Ambient temperatures during testing range from 60'
<br />' to 80' F. Sample material contained in the cell is left undisturbed
<br />for the duration of the test.
<br />~ RESULTS
<br />t All analytical results on leachates generated from each cell are
<br />reported on a standard format. Graphs of pH, cumulative sulfate, and
<br />' cumulative acidity versus time are also reported.
<br />DISCUSSION
<br />Kinetic tests used to predict acid mine drainage are a relatively
<br />new concept. Humidity cell tests are designed to measure the rate of
<br />oxidation and weathering of various types of materials. Operating
<br />specifications are flexible and can be designed to best match a
<br />particular environment. Results can also be reported in a format that
<br />~ best fits the needs of the project.
<br />Sobek, Andrew A., Shuller W.A., Freeman J.R., and Smith, R.M., Field
<br />And Laboratory Measurements Applicable to Overburden and Minesoil, EPA-
<br />600/2-78-054, March 1978, pp. 182-185.
<br />~ Ferguson, K.D., Static and Rinetic Methods to Predict Acid Mine
<br />Drainage, Department of the Environment, Environmental Protection
<br />Service, Pacific Region, July, 1985. 37 pages.
<br />Skousen, J.G., Sencindiver, J.C., and Smith, R.M., A Review of
<br />Procedures for Surface Mining and Reclamation in Areas with Acid-
<br />Producing Materials, Division of Plant and Soil Sciences, College of
<br />Agriculture and Forestry, West Virginia University, Morgantown, West
<br />Virginia, April, 1987. pp 3-8.
<br />Williams, R.D., Schuman, G.E., Reclaiming Mine Soils and Overburden in
<br />~ the Western United States, Analytical Parameters and Procedures, Soil
<br />Conservation Society of America, 1987. pp. 233-258.
<br />ina dndlyYi, Opmgns w inbrpreli~pns conlamee m Ines report aye Wzeu upon oosenauons one mdlendi supp~~ep Ur me cl~nnl Iw .nme e.cW:.re anu i%^N.~and uac v„a wy.w i~n
<br />Evan mob Tnp mtwpameoru a ppmona aapasW represam rn. Ersi ;uagmem or Coro iaoooia.es Caa Lawrau~es aswmes m iasponvp.my ara m..•s nn .a~~amy o• ~ep~~s•: ma
<br />igna, lapses OI ingl~e0. tl ro Ina proourln+ry, propr aprauons a pror,iapler~ess M~.puar of enY o.. yu, cwl a plner minarsl, V oparlY, +nE or LM n .onne[uon wnn ..n¢n sucn
<br />report n uaaa d M+tl upon IEr any reuon a•hslapeear
<br />
|