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Modeling of titration experiments by a reactive transport model.pdf
MiningScienceandTechnology(China)21(2011)273—276
一
A R T IC L E lN F O A B S T R A C T
Articlehistory: AcidminedrainagefAMD)iscommonlytreatedbyneutralizationwithalkalinesubstances.Thistreat-
Received27September2010 mentissupportedbytitrationexperimentsthatillustratethebufferingmechanismsandestimatethe
Received inrevisedform baseneutralizationcapacity (BNC)oftheAMD.Detailed explanationoftitrationcurvesrequires
30October2010
modelingwithahydro—chemica1mode1.Inthisstudythetitrationcurvesofwatersamplesfrom the
Accepted20November2010
drainageoftheAsPontesmineandthecorrespondingdumpshavebeeninvestigatedandsixbu ersare
selectedbyanalyzingthosecurves.Titrationcurveshavebeensimulatedbyareactivetransportmodelto
Keywords:
discoverthedetailedbufferingmechanisms.Thesesimulationsshow sevenregionsinvolvingdifierent
Titrationexperiment
bufferingmechanism .TheBNCisprimarilyfram buffersofdissolvedFe.Alandhydrogensulfate.TheBNC
Reactivetransportmodel
Bufferingmechanism canbeapproximatedby:BNC=3(CFe+CA1)+0.05CsulfatewheretheunitsaremollL.TheBNCofthe
Baseneutralizationcapacity samplerfom themineis9.25x10一 mollLandthatofthedumpssampleis1.28×10— mol/L.
Copyright@ 2011.ChinaUniversityofMining&Technology.AIlrightsreserved.
2.MateHaisandmethods
Mineactivitiesmayposesevereimpactsinwaterresourcesand Thestudywasperformedonwaterrfom theAsPorttesCoalM inein
ecosystemswh
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