PMID: 11917996Mar 29, 2002Paper

Evaluating remedial alternatives for an acid mine drainage stream: application of a reactive transport model

Environmental Science & Technology
Robert L Runkel, Briant A Kimball

Abstract

A reactive transport model based on one-dimensional transport and equilibrium chemistry is applied to synoptic data from an acid mine drainage stream. Model inputs include streamflow estimates based on tracer dilution, inflow chemistry based on synoptic sampling, and equilibrium constants describing acid/base, complexation, precipitation/dissolution, and sorption reactions. The dominant features of observed spatial profiles in pH and metal concentration are reproduced along the 3.5-km study reach by simulating the precipitation of Fe(III) and Al solid phases and the sorption of Cu, As, and Pb onto freshly precipitated iron(III) oxides. Given this quantitative description of existing conditions, additional simulations are conducted to estimate the streamwater quality that could result from two hypothetical remediation plans. Both remediation plans involve the addition of CaCO3 to raise the pH of a small, acidic inflow from approximately 2.4 to approximately 7.0. This pH increase results in a reduced metal load that is routed downstream by the reactive transport model, thereby providing an estimate of post-remediation water quality. The first remediation plan assumes a closed system wherein inflow Fe(II) is not oxidized by the tr...Continue Reading

References

Apr 29, 1988·Science·D M McKnightK E Bencala

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Citations

Jul 8, 2008·Environmental Monitoring and Assessment·Brian S Caruso, Helen E Dawson
May 17, 2012·Environmental Science & Technology·Lindsay A BearupJohn E McCray
Nov 15, 2011·Environmental Science & Technology·Robert L RunkelRobert E Broshears
Feb 14, 2012·The Science of the Total Environment·Suzan ArandaLaurie S Balistrieri
Sep 22, 2016·The Science of the Total Environment·Sarah Jane O WhiteBriant A Kimball
Nov 2, 2016·Environmental Science & Technology·Lucia Rodriguez-FreireJosé M Cerrato
Jun 8, 2017·Environmental Science and Pollution Research International·Patrick ByrneKatherine Walton-Day
Jan 27, 2005·Environmental Science & Technology·Jianhong Ren, Aaron I Packman
Mar 8, 2008·Environmental Science & Technology·Kevin J FarleyBenjamin E Miller

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