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Prepared in cooperation with the Tennessee Department of TransportationBibliography for Acid-Rock Drainage and SelectedAcid-Mine Drainage Issues Related to Acid-RockDrainage From Transportation ActivitiesOpen-File Report 2015-1016U.S. Department of the InteriorU.S. Geological Survey

Cover.(Front and back) Photographs showing roadcut staining caused by acid-rock drainage in Hickman County, Tennessee.

Bibliography for Acid-Rock Drainage andSelected Acid-Mine Drainage IssuesRelated to Acid-Rock Drainage FromTransportation ActivitiesBy Michael W. Bradley and Scott C. WorlandPrepared in cooperation with the Tennessee Department of TransportationOpen-File Report 2015–1016U.S. Department of the InteriorU.S. Geological Survey

U.S. Department of the InteriorSALLY JEWELL, SecretaryU.S. Geological SurveySuzette M. Kimball, Acting DirectorU.S. Geological Survey, Reston, Virginia: 2015For more information on the USGS—the Federal source for science about the Earth, its natural and livingresources, natural hazards, and the environment—visit http://www.usgs.gov or call 1–888–ASK–USGS.For an overview of USGS information products, including maps, imagery, and publications,visit http://www.usgs.gov/pubprodAny use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by theU.S. Government.Although this information product, for the most part, is in the public domain, it also may contain copyrighted materialsas noted in the text. Permission to reproduce copyrighted items must be secured from the copyright owner.Suggested citation:Bradley, M.W., and Worland, S.C., 2015, Bibliography for acid-rock drainage and selected acid-mine drainageissues related to acid-rock drainage from transportation activities: U.S. Geological SurveyOpen-File Report 2015–1016, 17 p., http://dx.doi.org/10.3133/ofr20151016.ISSN 2331-1258 (online)

iiiContentsAbstract.1Introduction .1Purpose and Scope.3Methods and Sources.3Selected Annotated Citations.3Bibliographic Citations.5Acid-Rock logical Impact.9Secondary Mineralization.10Other.11Acid Mine 3Ecological Impact.14Secondary gure1. Location of pyrite-bearing formations in Tennessee with the potential foracid-rock drainage.2

Bibliography for Acid-Rock Drainage and Selected AcidMine Drainage Issues Related to Acid-Rock DrainageFrom Transportation ActivitiesBy Michael W. Bradley and Scott C. WorlandAbstractAcid-rock drainage occurs through the interaction ofrainfall on pyrite-bearing formations. When pyrite (FeS2) isexposed to oxygen and water in mine workings or roadcuts,the mineral decomposes and sulfur may react to form sulfuricacid, which often results in environmental problems andpotential damage to the transportation infrastructure. Theaccelerated oxidation of pyrite and other sulfidic mineralsgenerates low pH water with potentially high concentrationsof trace metals. Much attention has been given to contamination arising from acid mine drainage, but studies related toacid-rock drainage from road construction are relativelylimited. The U.S. Geological Survey, in cooperation withthe Tennessee Department of Transportation, is conductingan investigation to evaluate the occurrence and processescontrolling acid-rock drainage and contaminant transport fromroadcuts in Tennessee. The basic components of acid-rockdrainage resulting from transportation activities are describedand a bibliography, organized by relevant categories (remediation, geochemical, microbial, biological impact, and secondarymineralization) is presented.IntroductionAcid-rock drainage (ARD) occurs through the interactionof rainfall and groundwater on pyrite-bearing formations, whichoften results in environmental problems and potential damageto the transportation infrastructure. There is a need to betterunderstand the chemical, geologic, hydrologic, and bacterialfactors that prevent and control acid production in runoff fromroadcuts during and after highway construction. Pyrite (FeS2)and similar minerals containing sulfur and trace metals are present in a number of rock formations throughout Middle and EastTennessee and can be particularly important in the black shaleof the Highland Rim and Valley and Ridge provinces, shale andcoal formations along the Cumberland Plateau, and shale andother metamorphic rocks in the Blue Ridge (fig. 1).When exposed to oxygen and water, pyrite (FeS2) maydecompose to form sulfuric acid (eq. 1). When released intothe environment, sulfuric acid can cause ecological problemsand damage to transportation infrastructures. Pyrite-bearingformations exposed in a road cut may contribute to acidicrunoff having a pH less than 4 and containing elevatedconcentrations of iron and other metals.12FeS2 45O2 34H2O 4[H3OFe(SO4)22Fe(OH)3] 16H2SO4(1)The resulting acid drainage and dissolved metals can betransported to surface water or, under dry conditions, mayform deposits of sulfur salts and entrained metals on thesurface of roadcuts. These secondary sulfate minerals (SSMs)are readily dissolved during subsequent precipitation, possiblyfurther loading runoff with mobilized metals and acidic water.In Tennessee, ARD has been observed along roadcutsassociated with the Chattanooga Shale and may also beassociated with the Sevier Shale, the Fentress Formation andPennsylvanian coal deposits, and sulfide-bearing Precambrianigneous and metamorphic rocks, especially the AnakeestaFormation (fig. 1). The Chattanooga Shale crops out alongthe Highland Rim escarpment in Middle Tennessee and alongstrike belts in East Tennessee. The Fentress Formation andequivalent formations and Pennsylvanian coal deposits cropout along the escarpments of the Cumberland Plateau. ThePrecambrian igneous and metamorphic formations crop outalong the Blue Ridge Mountains in East Tennessee.Runoff contaminated with ARD from roadcuts can betreated similar to acid-mine drainage (AMD), that treatment can be costly and must be maintained. Over the past20 years, scientists and engineers have experimentally alteredenvironmental conditions to stimulate microbial remediationin contaminated aquifers (Bradley 2003; U.S. EnvironmentalProtection Agency, 2004). Chemical supplements, such asperoxide-compounds that increase oxygen levels to stimulateaerobic fuel biodegradation (King and others, 2005), or lactateand molasses that stimulate iron- or sulfur-reducing bacteriato enhance reductive dechlorination, have been injected

NashvilleCentral BasinSequatchieValleyHighland RimChattanoogalValedanedgRi00General outcrop pattern of theChattanooga Shale along theHighland Rim escarpmentFentress FormationChattanooga Shale5050100 KILOMETERS100 MILES³Precambrian formations, undifferentiatedSevier ShaleGeneral extent of the Pennsylvaniancoal-bearing raphic provinceyCumberlandPlateauFigure 1. Location of pyrite-bearing formations in Tennessee with the potential for acid-rock drainage.Location of study area in TennesseeTennesseeGeology modified from Hardeman 1966.Physiography from Miller, 1974Highland Rim2   Bibliography for Acid-Rock Drainage and Selected Acid-Mine Drainage Issues Related to Acid-Rock Drainage

Selected Annotated Citations   3into aquifers to stimulate contaminant remediation (Byland Williams, 2000; Byl and others, 2002; Byl and Painter,2009). These strategies, used to manipulate biogeochemicalprocesses in the subsurface, have been very successful in thebioremediation of organic and metal contaminants. However,minimal research has been conducted in the application of thismicrobial engineering strategy to control ARD at roadcuts inareas prone to pyrite oxidation and acid formation. The U.S.Geological Survey (USGS), in cooperation with TennesseeDepartment of Transportation, conducted an investigationto identify the geochemical, bacterial, and hydraulic factorscontrolling acid production from pyrite-bearing rock and toevaluate methods to control acid production and contaminanttransport from roadcuts in Tennessee. The primary objectivesof the investigation are to (1) evaluate engineering andhydrologic controls to reduce formation of acid and metaltransport, (2) define mechanisms and sources for transportof water and oxygen into pyrite-bearing formations andthe formation of acid runoff, and (3) identify chemical orenvironmental conditions that reduce the biological productionof acid from pyrite, with an emphasis on beneficial microbialcommunities that reduce pyrite oxidation. One component ofthe investigation was a detailed literature search and reviewfor ARD covering peer reviewed journals, academic thesesand dissertations, and government reports on ARD.Purpose and ScopeThe purpose of this report is to present the results ofthe literature search and selected reviews conducted for theinvestigation and to provide a bibliography for ARD issuesand processes, ARD and transportation systems, and relevantreferences for AMD. The bibliography includes 210 referencesfor books, journal articles, conference proceedings, reports,and master’s theses and doctoral dissertations. Most referencesare presented in simple citation form; seven of the mostrelevant are annotated in brief summaries.Methods and SourcesThe references included in this bibliographywere compiled from a series of computer searchesfrom various databases and search engines. Availableon-line search engines included the USGS PublicationsWarehouse (http://pubs.er.usgs.gov/), Google Scholar(http://scholar.google.com/), ACORN and WorldCatthrough the Heard Library, Vanderbilt University(http://www.library.vanderbilt.edu), and the USGS NationalGeologic Map Database (http://ngmdb.usgs.gov). Databasessuch as GeoRef and others also were searched through theUSGS Library (http://library.usgs.gov/). The references wereindexed by major topic, ARD, AMD, or geologic formation.The USGS National Geologic Map Database—GeologicLexicon (http://ngmdb.usgs.gov/Geolex/search) was searchedfor additional information and references on specific geologicformations. The acid drainage literature was further evaluatedfor the application to background information, remediationactivities, geochemical processes, microbial activity, ecological impact, secondary mineralization and other ARD or AMDassociated topics.Selected Annotated CitationsThe literature review identified seven research papersrelated to ARD, transportation, SSM, or remediation that werefound to be particularly helpful. The selected references arelisted below with annotations summarizing the reports andstating the relevance of the material to ARD processes.Hammarstrom, J.M., Brady, Keith, and Cravotta, C.A.,2005, Acid-rock drainage at Skytop, Centre County,Pennsylvania, 2004: U.S. Geological Survey Open-FileReport 2005–1148, p. 50, accessed July 11, 2014, athttp://pubs.usgs.gov/of/2005/1148/.Relevance: Hammarstrom and others (2005) is one of thefew reports that deal exclusively with ARD caused by roadconstruction. The report provides a case study with excellentexamples of the phenomena and processes present at an ARDimpaired road construction site.Summary: Hammarstrom and others (2005) investigatedthe ARD arising from road construction activity on Interstate99 in Skytop Pennsylvania. The area contained exposed pyriteand associated zinc-lead sulfide minerals beneath a 10-meter(m) gossan along a 40- to 60-m deep roadcut through a 270-mlong section of the Ordovician Bald Eagle Formation. Thepyritic sandstone from the roadcut was crushed and usedlocally as road base. Acidic (pH 3), metal laden seeps andrunoff from the roadcut had to be remediated, causing a delayin road construction. Storm events followed by dry periodspromoted oxidative weathering and dissolution of primarysulfides, which resulted in intermittent deposition of secondarysulfur salts (copiapite, melanterite, and halotrichite). Thesalts rapidly decreased the pH of deionized water to below2.5 during laboratory tests. The salts sequestered metalsand acidity between rainfall events, and contribute pulses ofcontamination during subsequent rain events.Hammarstrom, J.M., Seal, R.R., II, Meier, A.L., and Kornfeld,J.M., 2005, Secondary sulfate minerals associated withacid drainage in the eastern US: Recycling of metalsand acidity in surficial environments: Chemical Geology,v. 215, no. 1, p. 407–431.Relevance: Hammarstrom and others (2005) presents astraightforward introduction to secondary sulfur mineral saltsthat are often present at ARD impaired road construction sites.Summary: Hammarstrom and others (2005) presented theresults of laboratory experiments conducted with secondarysulfate minerals (sulfur salts) commonly associated with ARD.The secondary minerals are produced when metal-sulfide

4   Bibliography for Acid-Rock Drainage and Selected Acid-Mine Drainage Issues Related to Acid-Rock Drainageminerals experience chemical and mechanical weathering.The salts form following rain events and subsequent drying.Dissolution experiments revealed a decrease in pH from6.0 to 3.7 units and an increase in dissolved aluminum( 30 milligrams per liter [mg/L]), iron ( 47 mg/L), sulfate( 1,000 mg/L), and base metals (2 to 1,000 mg/L). Locationswith winter-long snowpack, such as Vermont, exhibitedthe highest metal loading during spring runoff. In warmerlocations, such as Virginia, metal loads peaked during thesummer months.Huckabee, J.W., Goodyear, C.P., and Jones, R.D., 1975, Acidrock in the Great Smokies: Unanticipated impact on aquaticbiota of road construction in regions of sulfide mineralization: Transactions of the American Fisheries Society, v. 104,no. 4, p. 677–684.Relevance: Huckabee and others (1975) address thenegative impact of road construction ARD on aquatic ecology.Although other papers explore similar phenomena, thispaper is unique in describing that the ARD and subsequentecological impact is the direct result of pyritic material fromthe Annakeesta Formation as a result of road construction.Summary: A highway construction project in the GreatSmoky Mountains National Park resulted in a fish kill on astream in the park. The stream drained an area of roadbed fillthat contained iron sulfide minerals. The pH below the fillwas significantly lower than the pH upstream. Brook troutwere eliminated from the stream for about 8 kilometers (km)downstream from the fill and this stream reach remaineddevoid of fish for over 10 years. Huckabee and others (1975)conducted survival experiments with brook trout and salamanders. Trout were placed in mesh baskets below and abovethe fill. After 2 days, all of the fish below the fill had died,and all of the fish above the fill survived. The results weresimilar for survival tests conducted with salamanders. Thestudy suggested that brook trout could not tolerate the streamconditions with a depressed pH. Iron and sulfide precipitatescoated the stream bed for 2 km downstream of the fill. Theresearchers conducted similar tests with fish and salamanderon small streams that flowed over a natural exposure of thepyrite-bearing Anakeesta Formation. The results showed thenegative effect of natural ARD on aquatic ecology.Kwong, Y.T.J., Whitley, G., and Roach, P., 2009, Natural acidrock drainage associated with black shale in the YukonTerritory, Canada: Applied Geochemistry, v. 24, no. 2,p. 221–231.Relevance: Kwong and others (2009) provides a background for understanding natural ARD. The authors explorethe potential acid production from pyritic materials naturallypresent in watersheds.Summary: Kwong and others (2009) investigated thesediment and water geochemistry associated with naturalARD originating from black shale formations in the YukonTerritory, Canada. Tributary streams contained water havinga pH of 3.0, and concentrations of 150 mg/L zinc, 39 mg/Lnickel, 2.8 mg/L copper, and 9.1 mg/L arsenic. The smalltributary streams having anomalous acidity and metal contentscontributed only a small fraction of contaminant loadings tothe major water sources in the area, and the authors proposedconsidering metal loadings on a watershed scale rather thanon a stream-by-stream basis. Dilution, neutralization, sorption,co-precipitation, and microbial mediation were identifiedas the major mechanisms attenuating aqueous transport ofpotentially deleterious metals.Keith, D.C., Runnells, D.D., Esposito, K.J., Chermak, J.A.,Levy, D.B., Hannula, S.R., Watts, M., and Hall, L., 2001,Geochemical models of the impact of acidic groundwater and evaporative sulfate salts on Boulder Creek atIron Mountain, California: Applied Geochemistry, v. 16,nos. 7–8, p. 947–961.Relevance: Keith and others (2001) modeled the potentialof ARD to degrade streams during storm events. Although thestudy was in a location of extensive ARD contamination, theeffect of rain events (temporal variability) and the transportprocesses (spatial variability) involved are important to anystudy of ARD.Summary: Keith and others (2001) modeled thehydrogeochemical “rinse-out” of metals and acidity duringthe first major storm of the wet season at Boulder Creek andIron Mountain, California. The heavy loading of metals andacidity arises from the dissolution of accumulated evaporativesulfate salts (SSM). For Boulder Creek, 20 percent of thedry-season baseflow was composed of acidic metal-bearingwater. Modeling results suggested that even a relativelymodest amount of sulfur salts can maintain the pH of surfacestreams near 3.0 during rainstorms. On a weight basis, it wasdetermined that Fe-sulfate salts are capable of producing moreacidity than other sulfate salts.Orndorff, Z.W., and Daniels W.L., 2004, Evaluation of acidproducing sulfidic materials in Virginia highway corridors:Environmental Geology, v. 46, p. 209–216.Relevance: Orndorff and Daniels (2004) provide a practical approach to an initial evaluation of ARD related to roadconstruction. The sulfide hazard map is intended to provideinformation about pyrite-bearing formations and the potentialneed to adopt best management practices during constructionalong transportation corridors.Summary: Orndorff and Daniels (2004) constructed astatewide sulfide hazard rating map for Virginia. Geologicformations associated with roadcuts producing ARD werecharacterized by calcium carbonate equivalence (frompotential peroxide activity tests) and total sulfur. The authorsconsidered occurrences from different geologic settings,including those in the Coastal Plain, Piedmont, Valley andRidge, Appalachian Plateau, and Blue Ridge physiographicprovinces. Formations with high acid producing potentialdid not always exhibit the most severe ARD, because theproduction of ARD at a given site was not only dependent onthe acid-producing potential, but also on the proximity and

Bibliographic Citations  5volume of surface water, drainage design, and the presence ofARD-neutralizing material.Nordstrom, D.K., and Southam, Gordon, 1997, Geomicrobiology of sulfide mineral oxidation, in Banfield, J.F., andNealson, K.H., eds., Geomicrobiology: Interactions betweenmicrobes and minerals: Washington D.C., Reviews in Mineralogy, Mineralogical Society of America, p. 361–390.Relevance: The book chapter by Nordstrom andSoutham (1997) is an excellent resource for exploring thebiogeochemistry involved with ARD. The chapter provides atechnical foundation of the oxidation reactions, reaction rates,and the catalyzing influence of microbiology on the chemicalbreakdown of sulfide minerals.Summary: Nordstrom and Southam (1997) providebackground for the biogeochemistry involved in pyriteoxidation. Microbes are often the only form of life found inwaters impaired by ARD. Lithotrophs derive their metabolicenergy from the oxidation of inorganic compounds, suchas iron and sulfur. The most common lithotroph involvedin the oxidation of pyritic materials is the bacterial genus,Thiobacillus. The presence of the lithotroph T. ferroxidans isdescribed by Nordstrom and Southam (1997) as increasingthe oxidation rate of iron by five orders of magnitude andhaving a significant effect on the weathering of pyrite. Whenthe surface of pyrite interacts with acidic solutions, the iron isleached from the surface leaving a sulfur-rich surface. Bacteriaattach themselves onto this sulfide surface and solubilize thesurface through enzymatic oxidation (direct mechanism).Microbes also catalyze the oxidation of aqueous ferrousiron to ferric iron. Sulfide is then oxidized by the ferric iron(indirect mechanism).Bibliographic CitationsThe literature review focused on ARD and transportationissues and included references on ARD remediation, geochemical processes, and biochemical processes. The originalliterature review was expanded to include the formation anddissolution of secondary sulfate minerals (SSMs) associatedwith ARD because of the presence of SSM at roadcuts in Tennessee and the potential for ARD contaminant transport fromthe SSM. Additional references on AMD that were applicableto the microbial conditions, biogeochemical processes andapplicable remediation methods were also included as part ofthe literature review.The bibliography is divided by primary subject in thereference, either ARD or AMD, and subdivided by selectedtopic: remediation, geochemical, microbial, ecological impact,and secondary mineralization. References that did not fit theselected topics were grouped as “Other.” The AMD referencesare not comprehensive, but include references that are mostrelevant to the understanding on the ARD processes and remediation. Selected references on the geology of pyrite-bearingformations in Tennessee are also included in the bibliography.Acid-Rock DrainageRemediationBarnes, H.L., and Gold, D.P., 2008, Pilot tests ofslurries for in-situ remediation of pyrite weatheringproducts: Environmental and Engineering Geoscience, v. 14, no. 1, p. 31–41. [Also available z Viggi, C., Pagnanelli, F., Cibati, A., Uccelletti,D., Palleschi, C., and Toro, L., 2010, Biotreatmentand bioassessment of heavy metal removal by sulphate reducing bacteria in fixed bed reactors: WaterResearch, v. 44, no. 1, p. 151–158. [Also available oshi, S.M., 2006, Bioremediation of acid mine drainage using sulfate-reducing bacteria: U.S. EnvironmentalProtection Agency, Office of Solid Waste and EmergencyResponse and Office of Superfund Remediation and Technology Innovation, 65 p. [Also available at http://cluin.info/download/studentpapers/S Doshi-SRB.pdf]Hard, B.C., Higgins, J.P., and Mattes, A., 2003, Bioremediation of acid rock drainage using sulphate-reducing bacteria:Sudbury 2003 Mining and the Environment Conferenceproceedings: May 25th-28th 2003, Sudbury, Ontario,Canada, p. 25–28. [Also available at 03/Bacteria/66.pdf]Kuyucak, N., 2002, Role of microorganisms in mining:generation of acid rock drainage and its mitigation andtreatment: European Journal of Mineral Processing andEnvironmental Protection, v. 2, no. 3, p. 179–196.Li, L.Y., Chen, M., Grace, J.R., Tazaki, K., Shiraki, K., Asada,R., and Watanabe, H., 2006, Remediation of acid rockdrainage by regenerable natural clinoptilolite: Water, Air,and Soil Pollution, v. 180, no. 1-4, p. 11–27. [Also availableat ld, D.M., Webb, J.A., and Taylor, J., 2006, Chemicalstability of acid rock drainage treatment sludge and implications for sludge management: Environmental Science &Technology, v. 40, no. 6, p. 1984–1990. [Also available athttp://dx.doi.org/10.1021/es0515194]Morgan, E.L., Porak, W.F., and Arway, J.A., 1983, Controllingacidic-toxic metal leachates from southern Appalachianconstruction slopes: Mitigating stream damage:Transportation Research Record, no. 948, p. 10–16.Morin, K.A., Hutt, N.M., Coulter, T.S., and Tekano, W.M.,2001, Case study of non-mining prediction and controlof ARD: The Vancouver Island Highway project: SixthInternational Conference on Acid Rock Drainage,Cairns, Australia - 12–18, July 2003, Mine site DrainageAssessment Group Fact Sheet, p. 18.

6   Bibliography for Acid-Rock Drainage and Selected Acid-Mine Drainage Issues Related to Acid-Rock DrainageMukhopadhyay, B., Bastias, L., and Mukhopadhyay,A., 2007, Limestone drain design parameters foracid rock drainage mitigation: Mine Water and theEnvironment, v. 26, no. 1, p. 29–45. [Also available wick, S., Zaluski, M., Park, B., and Bless, D., 2006,Advances in development of bioreactors applicable to thetreatment of ARD, in Barnshiel, R.I., ed., Proceedings ofthe 7th International Conference on Acid Rock Drainage(ICARD), March 26-30, 2006, St. Louis, Mo., p. 1410–1420.Posey, H.H., 2001, Developments in ARD remediationtechnologies at western hard rock mines, U.S., in 2001Symposium of the West Virginia Mine Drainage Task ForceProceedings, West Virginia University, 9 p. [Also availableat , D., Clark, M., and Pitman, T., 2009, Treatment of an ironrich ARD using waste carbonate rock: bench-scale reactortest results: Mine Water and the Environment, v. 28, no. 4,p. 253–263.Rose, A.W., and Barnes, H.L., 2008, Alkaline addition problems at the Skytop/Interstate-99 site, central Pennsylvania,in National Meeting of the American Society of Mining andReclamation, American Society of Mining and Reclamation,June 14–19, 2008, Richmond, Va., p. 23.Sand, W., Jozsa, P.-G., Kovacs, Z.-M., Săsăran, N., andSchippers, A., 2007, Long-term evaluation of acid rockdrainage mitigation measures in large lysimeters: Journal ofGeochemical Exploration, v. 92, nos. 2-3, p. 205–211. [Alsoavailable at kes, T.E., and Möller, G., 1999, Removal of dissolvedheavy metals from acid rock drainage using iron metal:Environmental Science & Technology, v. 33, no. 2,p. 282–287.Smith, M.W., Varner, J.P., Mital, J.P., Jr., and Sokoloski,D., 2006, Remediation of acid rock drainage from highway construction in the Marcellus Shale, Mifflin County,Pennsylvania, in Proceedings of Northeastern Section, 41stAnnual Meeting, Geological Society of America Abstractswith Programs, Geological Society of America, p. 33.Smoke, J.D., 2007, Preliminary design of a treatment systemto remediate acid rock drainage into Jonathan Run: Schoolof Engineering, University of Pittsburgh, Master’s Thesis,99 p. [Also available at http://d-scholarship.pitt.edu/8104/]Smoke, J.D., Neufeld, R.D., Monnell, J., and Gray, T., 2008,Remediation of acid rock discharges, in Proceedingsof the Water Environment Federation, v. 2008, no. 11,p. 4790–4802.Thomas, R.C., and Romanek, C.S., 2002, Passive treatmentof low-pH, ferric iron-dominated acid rock drainage in avertical flow wetland I: Acidity neutralization and alkalinitygeneration, in Proceedings of the 2002 National Meetingof the American Soc

references for AMD. The bibliography includes 210 references for books, journal articles, conference proceedings, reports, and master’s theses and doctoral dissertations. Most references are presented in simple citation form; seven of the most relevant are annotated in brief summaries. Methods and Sources

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