PMID: 15224746Jul 1, 2004Paper

Reactive transport modeling of column experiments for the remediation of acid mine drainage

Environmental Science & Technology
Richard T AmosC J Ptacek

Abstract

Reactive transport modeling was used to evaluate the performance of two similar column experiments. The experiments were designed to simulate the treatment of acid mine drainage through microbially mediated sulfate reduction and subsequent sulfide mineral precipitation by means of an organic carbon permeable reactive barrier. Principal reactions considered in the simulations include microbially mediated reduction of sulfate by organic matter, mineral dissolution/precipitation reactions, and aqueous complexation/hydrolysis reactions. Simulations of column 1, which contained composted leaf mulch, wood chips, sawdust, and sewage sludge as an organic carbon source, accurately predicted sulfate concentrations in the column effluent throughout the duration of the experiment using a single fixed rate constant for sulfate reduction of 6.9 x 10(-9) mol L(-1) s(-1). Using the same reduction rate for column 2, which contained only composted leaf mulch and sawdust as an organic carbon source, sulfate concentrations at the column outlet were overpredicted at late times, suggesting that sulfate reduction rates increased over the duration of the column experiment and that microbial growth kinetics may have played an important role. These mode...Continue Reading

References

Jan 19, 2002·Ground Water·Ralph D LudwigKeith Mountjoy
Apr 12, 2002·Environmental Science & Technology·K R WaybrantD W Blowes

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Citations

May 1, 2012·Environmental Science & Technology·Sung-Wook JeenDavid W Blowes
Nov 17, 2012·Environmental Science & Technology·Julia H Jamieson-HanesDavid W Blowes
Mar 29, 2008·Bioresource Technology·Navarro Flores Andrés, Martínez Sola Francisco
Jan 12, 2007·Journal of Environmental Quality·Carmen-Mihaela NeculitaBruno Bussière
Mar 2, 2011·Environmental Science & Technology·Blair D GibsonDavid W Blowes
Jan 19, 2008·Environmental Science & Technology·Henning PrommerBradley M Patterson

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