welcome to the 6 mintek analytical science symposium the ... · 5th analytical science symposium...
TRANSCRIPT
SymposiumInvitationWelcome to the 6th Mintek Analytical Science Symposium
The EnvironmentFriday, 21st October 2016Mintek Auditorium
Mintek, together with SASS invites you to the annual analytical symposium
ProgrammeMorning Session: Programme Director – Mr Graham Sithole07:00 – 08:00: Registration(Tea/Coffee)08:00 – 08:10: OpeningandWelcomeCEO&PresidentofMintek:(MrAbielMngomezulu)08:10 – 08:20: MessagefromSASS(ProfRobMcCrindle)08:20 – 08:25: AuditoriumOrientation(MrGrahamSithole)
To submit abstracts and/or book your exhibition stand, contact Ms Dhiroshnee Govender: ASD Symposium Co-ordinator, +27 11 709 4210, [email protected] or
Ms Clara Myanga+27 11 709 4046, [email protected]
5th AnAlytiCAl SCienCe SyMpoSiuM 2015
“Quality in AnAlyticAl chemistry”
FriDAy, 30 oCtober 2015Mintek ConFerenCe Centre
A global leader in mineral and metallurgical innovation
Prospective authors are invited to submit titles and abstracts of their papers, in English.The abstracts should not be longer than 250 words.
Please diarise key dates:10 July 2015........................Closing date for submission of titles and abstracts
17 July 2015........................Acceptance of titles and abstracts
03 August 2015...................Closing date for submission of final paper
26 October 2015.................Closing date for submission of presentations
30 October 2015.................Symposium
Exhibitions: Exhibitors are welcome. Price per stall: R3 070 excl. VAT. Stall package: floor space of 2m x 2m; standard Mintek table with black table cloth; two chairs; refreshments for two and entrance for two to the presentations.
All payments for stalls no later than 1 October 2015
CAll fOR PAPERs & AbsTRACTs
08:25 – 08:50
Title: BROMINATEDFLAMERETARDANTSININDOORANDOUTDOORENVIRONMENTINSOUTHAFRICA:ANYNEEDTOWORRY?
Presenter: Prof. Okechukwu Jonathan Okonkwo
TheextensiveuseofchemicalflameretardantstomeetFlammabilityStandardsprovidesanexampleoftheneedtofirstconsidertheenvironmentalimpactsoffiresafetyinterventionsbeforeanyimplementation.Flameretardantshavebeenusedinproductswithpossiblehighlevelsofhumanexposure.InordertoassessthepresenceandlevelsofBFRsinindoorandoutdoorenvironment,dustfromconsumergoods,surfacewater,groundwater,landfillleachatesandsedimentareusedtoillustratetheirlevelsandrisks.
08:50 – 09:15
Title:WASTE,WATERANDCARBONFOOTPRINTASSTREAMLINEDINDICATORSFORSUSTAINABILITYINRESEARCHANDDEVELOPMENTSECTOR
Presenter: Mr Landu Landu
HowdoexecutivemanagementselectandemploystreamlinedindicatorstofacilitateR&Dactivitiesandprovideaserviceisamatterofsustainabilityinterestandpracticalsignificance.Waste,waterandcarbonfootprintmeasureshowmuchwaterandenergyanR&DorganisationconsumesandtheamountofwastegeneratedduringR&Dvaluechain.Waste,waterfootprintandcarbonfootprintarewell-knownindicatorswithsoundpublicperceptiontoassessenvironmentalperformanceandfurtherimprovetheSHEQaspectofthebusiness.Aresearchcouncilmaynotnecessarilyusehugequantitiesofnaturalresourcesandhumancapitalcomparablewithotherlargescalecompanies.However,anygivenR&Dorganisation,initsdailyactivitiesstill,consumeselectricity,producewastes,emitcarbon,providehumancapitaldevelopment,etc.Fromthisperceptionsuchanorganisationisnodifferentinitsaccountabilitywithrespecttosustainabilityachievementandstandards.Asarelativelysmallcontributortowaterscarcityaswellasgreenhousegas(GHG)emissions, immensepotentialexists intheR&Dsectorfordecreasingenvironmental impactsgeneratedfromR&DandconsumptionactivitiesasrequiredforSHEQinanyorganisationofthiskind.Inthispaper,waste,waterandcarbonfootprintsare reviewedforR&Doperationstoevaluatetheapplicabilityofsustainabilityconceptfortheservicesthattheorganisationprovidesto thepublicandprivateentities.Theresultsdemonstratedwellcomprehensivenessandpracticalityofwaste,waterandcarbon footprintsasefficientindicatorstosustainabilityoftheR&DactivitiesinlinewiththevisionstipulatedintheNationalDevelopmentPlanandcompliancetotheNationalEnvironmentalManagementAct,1998(ActNo.107of1998)ofthecountry.
09:15 – 09:40
Title:LASERABLATIONICP-MSASAMETHODTOQUANTIFYPRECIOUSMETALSINALLOYSPRODUCEDFROMELECTRONICWASTE
Presenter: Ms Candice Benesha Carelse
Aspartofitsinitiativesinurbanmining,Mintekisassessingwaystorecovermetalsfromelectronicwaste.Oneofthesemethodsispyrometallurgical,theaimbeingtosmeltprintedcircuitboardsinafurnace,andtocollectpreciousandothermetalsinthealloythatforms.Tobetterunderstandpreciousmetaldistributioninthesealloys,amethodwasdevelopedtoquantifyAuandAg,usinglaserablationinductivelycoupledplasmamassspectrometry(LA-ICP-MS).ParticularattentionwaspaidtoCu-richareas,owingtothehighaffinityofAuforCu.
TwoCu-Snphases,aPb-phase,aCu-Fephase,aFe-SiphaseandaFe-Cuphaseweredistinguishedinalloysfromtapsamples,usingscanningelectronmicroscopyandelectronprobemicroanalysis(EPMA).ResultsfromEPMAshowthatAuandAgarepresentinphaseconcentrationsofupto1100ppmand1.2%respectively,withdetectionlimitsof200ppmAuand300ppmAg.TheLA-ICP-MSmethodsuccessfullyquantifiedAuandAgdowntoconcentrationlevelsof39and340ppm,respectively.Uncertaintiesrangefrom4.80%relativeto3.93%relativeovertheconcentrationrange39ppm-340ppmAu.ForAg,uncertaintiesrangefrom4.38%relativeto5.9%relativeovertheconcentrationrange340ppm-2.6%.GoldisunderestimatedbyLA-ICP-MScomparedwithEPMA;thisisattributedtothelowAucontentofthecalibrationstandard.SilverconcentrationscomparewellbetweenEMPAandLA-ICP-MS.Themethodshowspromiseforsimilaranalysisofalloysingeneral.
09:40 – 10:05
Title:VIABILITYOFPRECIOUSMETALSANDBASEMETALSRECOVERYFROMe-waste
Presenter: Ms Zizile Mhlambiso
E-wasteisanemergingglobalurbanminingissue,drivenbytherapidlyincreasingquantitiesofcomplexend-of-lifeelectronicequipment.Wastemanagementofe-wastehasledtorecyclingtorecoverpreciousmetalsandsomeeconomicallyfeasiblebasemetals. Thisstudyisfocusedonproducingarepresentative,uniform85%lessthan75micronsub-sampleforanalyticaldeterminationstosupporttherecyclingmetallurgicalprocesses.Theprimarypreparationstepwasthefocustoensuretherequiredparticlesizeofthesample.Themassofthesub-samplewas1.47Kgwhichwaspulverisedandseparatedintoafineandacoarsefractionusinga1.7mmscreen.Thiswasfollowedbyrotarysplittingwitha10unitEriezrotarysplitter.Thecoarsefractionwasfurtherrotarysplitinto10units,5unitsrecombinedtoformasinglesplitof110g.Hence,twosplitsof110gfromthecoarsefraction.Thefinefractionwasrotarysplitinto10unitsofwhich2unitswasrecombinedtogive5finalsplitunitsof250g.Thefineandcoarsefractionswereashedat900oCfor6hourstodecomposethematerialtherebyenablingpulverisingtoagrind-sizeof-75µ.Particlesizedeterminationwas92%ofthefinefractionpassed75µand85%ofthecoursefractionpassed75µ.Afterashingthemasslosswasapproximately35%forthefineand21%forthecoarsealiquotsrespectively.Thefinealiquotsproducedlowrelativestandarddeviations(RSD);gold3.22%,palladium6.34%,platinum6.17%andcopper2.24%for25determinations.ThecoarsefractionaliquotsgavehigherRSD’sthanthefinefractionfor;gold7.92%,palladium16.5%,platinum58%andcopperwasslightlylowerat0.02%.Thetotaldeterminationsforthecoarsefractionwere6.Thereproduciblemeasurementsobtainedverifiedthattheprimarypreparationprocedureproducedahomogenoussamplethatcanbesub-sampledforanalyticaldeterminations.
10:05 – 10:30 Mid-Morning Refreshments
10:30 - 10:55
Title:AIRBORNESEMI-VOLATILEORGANICPOLLUTANTSINSOUTHAFRICANPLATINUMMINES
Presenter: Prof Patricia Forbes
Elevated levelsofatmosphericsemi-volatileorganiccompounds(SVOCs), includingtoxicpolycyclicaromatichydrocarbons(PAHs),mayariseinundergroundminesduetotheuseofdieselmachineryinconfinedenvironments.ThesePAHsmaybepresentintheundergroundatmosphereeitherinthegasphaseoradsorbedontothesurfaceofparticles,primarilydieselparticulatematter.ItisimportanttosamplebothphasesinordertoelucidatethepotentialPAHoccupationalexposurelevels,asthehealthimpactsofeachphaseisdifferent.Asmall,portabledenuderdevicewasemployedtosampletheairinthreeundergroundplatinummines,whichconsistedoftwomulti-channelsiliconerubbertrapsinseries,separatedbyaquartzfibrefilterwithasmall,batteryoperated,portablesamplingpump(Geldenhuysetal.,2015).TheprimarytrapcollectedgasphaseSVOCs,includingPAHs,whilstthefiltersampledparticlephaseanalytes.ThesecondarytrapdownstreamofthefiltercollectedanySVOCswhichmayhaveblownofftheparticlesontheprimarytrapatsamplevolumesbelowthatofthebreakthroughvolume.Samplesweretakenatvariouslocationsinshaftswheredieselisused,aswell as innon-diesel shafts.Each componentof thedenuderwasanalysedby thermaldesorption-GCxGC-TofMS,whichshowedthatPAHs(mainlynaphthaleneandthemono-methylatednaphthalenederivatives)wereprimarilypresentinthegasphase.ParticlephasePAHs(primarilyfluorantheneandpyrene)werefoundinthehighestconcentrationsinthedieselexhaustsamples.ThiswasthefirstsuchstudyofminingatmospheresinSouthAfrica
10:55 – 11:20
Title:ACUTETOXICITYTESTINGWITHLUMINISCENTVIBRIOFISCHERI
Presenter: Dr Duduetsang Saku
Microtox® acute toxicity testing offers a rapid, efficient and affordable way of regular monitoring or screening for toxicity duringthetreatmentofeffluentplants, leachatesoracidminedrainage.Costlychemicalanalysisare limitedandcannotprovidechemicaltoxicityeffectsonbiota.Microtox®technologyisbasedonluminescentmarinebacteria,Vibriofischeri;anorganismthatisgloballyrecognizedastheoverallbestrepresentativespeciesforaquaticorganisms.Vfischeriistreatedwithasuspectedtoxicantin aqueousmediaatdifferentconcentrations.Ina‘healthy’statetheluminescenceisrecordedandcomparedtotheluminescenceafter interactionwithtoxicants.ThisprovidesameasureoftheoverallacutetoxicitythatcanbereportedasEC50.Microtox®ishowevernotlimitedtoenvironmentalsamplessuchaswater,soilorsoilsediments.Itsefficiencyinreportingacutetoxicitycanbeusedinproductionfacilitiestomonitoron-goingprocessesinordertopredictenvironmentalimpactoffinalproductsand/ortheirwaste.Thismethodcanalsoassistintheselectionofenvironmentallybenignmaterialsduringproductionthroughrapidtoxicitytestsofthesematerials,withresultsavailablewithin24hours.AcutetoxicityinformationprovidedbyMicrotox®,promotescheaperin-housewastedisposal/treatmentalternativesinsteadofusingwastedisposalcompanies.
11:20 – 11:45
Title:APPLICATIONOFACIDBASEACCOUNTINGTOPREDICTPOST-MININGDRAINAGE QUALITYINCOALFIELDSOFTHEMAINKAROOBASINANDSELECTEDSUB-BASINS
Presenter: Dr Lindani Ncube
AcidBaseAccounting(ABA)isatoolusedtoassessthetotalamountofacidityoralkalinitycontainedinaspecificrocksample,andisbasedonthetotalSconcentrationandthecarbonatecontentofthesample.ApreliminaryABAtestwasconductedontwelvesandstoneandsevencoalsamplestakenfromcoalfieldsrepresenting;theMainKarooBasin(Highveld,VryheidandMolteno/IndweCoalfields)and theSub-basins (WitbankandWaterbergCoalfields). The resultsobtained, indicates that sandstonesandcoal fromtheMainKarooBasinhavethepotentialofgeneratingacidminedrainage(AMD)astheycontainsufficientpyritetogenerateacid,withthefinalpHvaluesofthesamplesturningacidicuponcompleteoxidation.SandstonefromcollieriesrepresentingtheMainKarooBasinarecharacterisedbyelevatedcontentsofreactiveS%.Allthestudiedsamplesarecharacterisedbyanacidpotential(AP)thatislessthantheneutralizingpotential(NP)exceptfortwosamples.TheresultsobtainedindicatethatthesandstonesfromtheMainKarooBasinarepronetoacidgenerationascomparedtosandstonesfromtheSub-basins.However,thecoalhasarelativelylowpotentialofgeneratinganyacid.TheapplicationofABAinthisstudycontributestoanunderstandingofthecomplexitiesgoverningwater-rockinteractions.Ingeneral,thecoalfieldsfromtheMainKarooBasinhavemuchhigherpotentialtoproduceAMDduringminingthanthecoalfieldsintheSub-Basins.
11:45 – 12:10
Title:COPPERMINING,PRODUCTIONANDPOORMINEWASTETREATMENT,DISPOSALMETHODSANDTHEIRTHREATSTOTHEENVIRONMENTINUGANDA
Presenter: Mr Turyamureeba Sam Frank
Thepaperdealswithcoppermining,productionandminewastemanagementinUganda.Largeamountsofminewastesgeneratedbythecopperminingindustryandtheprocessofbeneficiationofmineralshaveposedabigthreattotheenvironment.Thesehaveledtoair,soil,waterpollutionandmanyotherhazardouseffectstotheenvironmentaswellaswildandhumanlives.Thispaperbroadlyaddressesthedifferenttypesofminewastesgeneratedduringtheentireminingprocessrightfromthemineralextractionandbeneficiationprocesses.Itprovidesacomprehensivereviewofthedifferentminewastesgeneratedbythedifferentminingmethodslikesurfacemining(opencast),undergroundminingamongothersandtheChemicals/reagentsusedintheextractionprocessofmineralsfromtheearth’scrustandbyproducts.Italsogivesthedetailsabouttheamountofwastematerialsgeneratedinextractingdifferentmineralslikecopperandcobaltmetals,copperandnickelhydroxides.Italsodiscussesthetailingsgeneratedbythemilling,mineralbeneficiationprocessesandtheirdifferentmethodsofdisposal.Thispaperalsoreviewstheimpactsoftheseminewastesontheenvironmentandhowtheyarethreatstowildandhumanlives.Italsodiscussesthemostefficientmethodsofdealingwiththisglobalconcernbypeopleallovertheworldandhowtheircumulativeeffectsmaybeminimized.Itoutlinessomesuggestions/recommendationsonpossiblemitigationmeasures.
12:10 – 12:35
Title:URANIUMASAPOTENTIALHEALTHHAZARDASWELLASANECONOMICASSETINTHELOUISMOORETAILINGSDUMPS,NEARGIYANI,LIMPOPOPROVINCE
Presenter: Mr Ndinannyi Kenneth Singo (Phd. Candidate)
IntheLimpopoprovincealoneover800abandonedandderelictmineshaveproducedanenormousquantityofrockwastedumpsand tailingsandotherassociatedmining infrastructurecollectivelyknownasmine residueareas. In theLouisMoore tailings,noattentionhasbeenpaidtotheextentofheavymetalsandothertraceelementsconcentrationsandtheirpotentialimpactsontheenvironmentandhumanhealth.Therewasalsoanurgentneedtotryandidentifytheeconomicpotentialofrehabilitatingsuchmineresidueareas.Thus,thefocusofthisstudywastoundertakeaconceptualstudyonthereclamationofmineresidues.Themainaimsofthestudyweretoestablish,whetheritwillbepossibletoreclaimtheminingresiduesinaneconomicallyviableway,andtoidentifypossiblehazardsassociatedwiththem.Themethodologyofthestudycomprisedfourphases:Intheinitialphase,themainaimwastoobtainfirst-handinformationaboutkeysamplingsites.Legallandaccesspermissionswererequestedfromtherelevantlandcustodians.Thesecondphaseinvolvedareconnaissancesurvey.Thiswasconductedtoensurethatfieldactivitiessuchasdrilling,loggingandsamplingaresafeandproductive.Inthethirdphase,atotaloften(10)augerholesweredrilledinthetailings.Thesewereloggedandsampled.Acombined47samplesweretakentotheUniversityofJohannesburglaboratoryforanalysis.Inthefourthphase,sampleswereanalysedforleachableelementabundancesbyICPOES.
Geochemicalanalysesandsubsequentmodellingofthediverseresidueswerecentraltoachievetheoutcomes.FromthegeochemicalassayedresultsofU, inLouisMoore,themeanconcentrationofUwerefoundtobe30ppm.Toquantifythepotentialeconomicimportanceandimpactsofthesemetals,geochemicalandresourcemodellingwasemployed.ThisrevealedthatUresidualinLouisMooreMineiscurrentlyat25.65tonnes.
Theoutcomespointedinprincipletotheviabilityofreworkingthetailings;however,atthesametimeapotentialenvironmentalriskisidentified.Bothaspectswillrequireestablishingthemineralogicalforminwhichuraniumoccurs.ShouldthereworkingoftheUintheLouisMoorebefeasible,thiswouldassistingeneratingenoughmoneytofundtherehabilitationcostsofthismineandpossiblysecondarytailingsbeingusedforotherpurposesastheymaycontinueposingpotentialdangertohumanhealthandenvironment.
12:35 – 13:30Lunch
Afternoon Session: Programme Director – Dr Johann Fischer
13:30 - 13:55
Title:MONAZITEASANUCLEARWASTEFORMFORENCAPSULATINGACTINIDES:AMINERALOGICALSTUDYOFNATURALMONAZITEFROMSTEENKAMPSKRAAL
Presenter: Ms Gabrielle Ficq
SouthAfricaisplanningtoexpandnuclearenergybybuildingadditionalnuclearpowerplants.Oneconsequenceofnuclearpowerisproductionofhigh-levelradioactivewaste,whichrequiresenvironmentallysafesequestration.Environmentallysafesequestrationdependsinpartonthelong-termrobustnessofthewaste-formusedtoencapsulatethewaste.Onewaste-formunderconsiderationisbasedonmonazite(ceriumphosphate,togetherwiththoriumsilicatethroughcoupledsubstitution).Itisthereforeimportanttoassesswhetheramonazite-basedwaste-formsafelyencapsulatestheradioactiveelementswithoutmobilisationduringalterationprocesses.Therehavebeenstudiesdocumentingchangesinchemicalcompositionduringalterationofmonaziteandtheresultantbreakdownmineralphases;onesuchstudyhasidentifiedsecondarymicrocrystallinemineralphasescompatiblewiththeactinides,otherwisecompletelossoftheseradioactiveelementsapparently istheresult(ReadandWilliam,2001).Anaturalanalogueofahigh-levelradioactivewasterepositoryistheMesoproterozoic-ageSteenkampskraalorebodylocatedintheWesternCape(SouthAfrica).Steenkampskraalcontainsabundantmonazite(andapatite);assuchtheorebodypresentsanopportunitytostudytheaccumulativelong-termeffectsofalterationandsubsequentmobilityofuraniumandthoriumfrommonazite.Thisstudyexaminedthinsectionsofmonaziteore from theSteenkampskraalorebodyusingapetrographicmicroscopeanda scanningelectronmicroscope (SEM) toidentifymineralassemblagesandanyobservableeffectsofalteration.Anelectronmicroprobe(EMPA)wasusedtodeterminethecompositionsofunalteredandalteredmonaziteinordertocomparativelyassessthelossofuraniumandthorium.Theresultsofthisstudyindicatenoobservablechangesinactinideconcentrationsbetweenunalteredandalteredmonazite.
13:55 – 14:20
Title:MANAGEMENTOFWASTEGENERATEDFROMHYDROMETALLURGICALPROCESSES
Presenter: Alice Mabunda
MINTEKworks inconjunctionwiththemining industrytodeveloptechnologythatwillbebeneficial forrecoveryandpurificationofpreciousmetalsfromoresbyhydrometallurgicalprocessessuchas,LeachingandPrecipitation,Ionexchange,Solventextraction,Electrowining,Cyanidedestruction,andCyanideanalysis.Hydrometallurgyissolutionbasedchemicalandmetallurgicalprocessesfortheextractionandrecoveryofpreciousmetalsfromores.Thesolutionincludesacidic,basicandorganicmedium.
Wastegeneratedfromtheprocessesinhydrometallurgyisgenerallyclassifiedashazardous.Therearechallengesregardingwastemanagementaswedealwithdifferenthazardousmaterialhoweverweintendtobeabletominimizeandtreatallwastethatwegenerateinthefuture.Thewastesispre-treatedandanalysedbeforesenttotheeffluentplantforfurthertreatmentanddisposal.Treatmentmethodsusedareprecipitationandneutralizationusinglime.
Therearehazardsandrisksthatareassociatedwithwastegeneratedfromtheprocessesindicatedabove.Wastegeneratedcanbetoxic,corrosive,flammable,radioactive,harmfulandpoisonousdependingonthespecificprocessused.Wastethat is incorrectlymanagedcankillpeople,animalsandaquaticspeciesandnegativeimpactontheenvironment.
ManagementofwastegeneratedfromdifferentmetallurgicalprocessesatHMDisestablishedandmaintainedby identifyingandclassifyingthewaste,thetreatmentmethodtobeusedpriortodisposal,trainingofpeoplehandlingwasteasrequiredbylegislation,providingthemwithproperpersonalprotectiveequipment,establishingsafeworkingproceduresandensureenforcementofsuchprocedureandcompliancetoalllegislationandmunicipalbylaws.
14:20 – 14:45
Title:IMPLEMENTINGTHENEWWASTEREGULATIONS:LESSONS,CHALLENGESANDOPPORTUNITIES;WASTEGENERATORSPERSPECTIVE
Presenter: Ms Mpendulo Ginindza
There is increasingconcernaboutenvironmentalpollutionandnatural resourceconservation.Governmentsare takingactionbyintroducingregulationsthatwilladdresstheseconcerns.TheConstitutionstatesthateveryonehastherighttohaveanenvironmentthatisnotharmfultohisorherhealth(GovernmentofSouthAfrica,1996).TheWasteActrequiresthatwastemustbemanagedinaccordancewiththehierarchyofwastemanagement(GovernmentofSouthAfrica,2008).TheregulationsundertheActhavehelpedtosimplifythelegalaspectsandrequirementsofavoiding,reducingandmanagingwaste.
In2013theWasteclassificationandmanagementregulationsincludingNationalnormsandstandardsforstorageofwastecameintoeffect.Responsibilitiesofwastegenerators,transportersandmanagersareclearlymarkedout.Legalobligationsaroundwasteclassifi-cationandsafetydatasheetdevelopmentthatpreviouslyfellonwastemanagershavebeenshiftedtowastegenerators.Prohibitionsandrestrictionsonthedisposalofwastetolandfillhavebeenalsobeenintroducedandwastegeneratorsareexpectedtocomplywithinthespecifiedtimes.
Asweimplementtheseregulationswecomeacrosschallenges,lessonsandopportunities.Oneofbiggestchallengeswhichhavealreadybeenidentifiedinthewasteindustryisthatoftheshortageofskillsandexpertiseinthisarea.OpportunitiesintheR&DsectoraretofindsolutionsforwastegeneratedinR&Dactivitiesaswellasprovidesolutionsandservicestoindustry.Thiswillrequireworkingwithstakeholderstocomplywithlegislationinordertomanagewasteeffectively,andmakeSouthAfricaabetterplaceforcurrentandfuturegenerations.
14:45 – 15:10
Title:SIMPLIFYINGTHEWASTEACTFORTHEWASTEGENERATOR
Presenter: Ms Belinda Berry
•OutlineofthelegalrequirementsforwastemanagementinSouthAfrica:oSummaryWasteLegalFrameworkinSouthAfricaoWasteInformationSystem(SAWIS)oStorageofWasteoDocumentandManifestRequirementsoLandfillClassesandWasteTypesoAssessmentandClassificationofwaste–AnalyticalandGHSrequirements•Alookatsometypicalwastestreamsgeneratedbythemining/metallurgicalindustryandthelegalrequirementsassociatedwiththesewastes.
15.10 – 15.20: Closing(MrAlanMcKenzie)15.20 – 15.30: VoteofThanks(MrJoeBaloyi)15.30 – 17.00: Refreshmentsandnetworking
1. Title:IMPLEMENTATIONOFTHECALUXBIOASSAYFORSCREENINGANDQUANTIFICATIONOFDIOXINS
Dr Mabel Coyanis
Abstract:MintekisimplementingtheDioxinResponsivecellbaseCALUX®(ChemicalActivatedLuciferasegeneeXpression)bioassayforthedetectionandquantitationofdioxinsanddioxin-likecompounds.Theassayisbasedonthecollectivetoxicresponseproducedbymorethan250chemicallyrelatedtoxicdioxinderivatives.Thetesthasfastturn-aroundtimes, ishighlysensitive,andholdsagoodcorrelationwithexpensivedioxinconfirmatorymethods(HRGC/HRMS).
TheDR-CALUXbioassayisacceptedbyinternationalregulatorybodiesforthescreeningofdioxinspresentinawidevarietyofma-trices,fromflyash,dust, soil,sediments,waterwaste,stackgas,air,animalfat,humanbreastmilk,animalstockfeed,fish,foodcontrol,etc.IthasbeenvalidatedandapprovedfordioxinscreeninginJapan(JISK0311),intheUS(EPA4435,Dioxins/dl-PCBsinsoil,sedimentsorashes),andisroutinelyusedintheEuropeanUnionandinAustralia(NSWDepofPrimaryIndustries)onthecontrolofanimalfeedfortheagriculturalsectorandhumanfood.
Bytheprovisionofacosteffectivealternativescreeningtestfordioxins,MintekaimstoencouragedioxincompliancetestinginSouthAfrica,helpingtoprotecttheenvironment,itspopulationsandnaturalresourcesfromuncontrolledharmfulemissions.
2. Title:PASSIVETREATMENTPLANTUSEDFORTREATINGEFFLUENTMINEWATERFROMTHEDOUGLASDISCHARGEPOINTATeMALAHLENI,MPUMALANGA:PILOTSTUDY
Ms Boitumelo Murishe Penelope
Abstract:TheaftermathofcoalminingintheHighveldcoalfieldsinMpumalangaprovincehastriggeredseriousenvironmentalissuesthatdemonstratedtheneedtodevelopremediationtech-nologiesthatarepracticable,efficient,costeffectiveandenvironmentallyfriendlyinawiderangeofphysicalsettings.Passivetreatmentisincreasinglygainingfavouroveractivetreatmenttechnologiesforthelong-termremediationofpollutedminewaterowingtoitsefficiencyinremovingcontaminantsatareasonablylowcost.
However,theapplicationofpassivetreatmentinSouthAfricahasbeenlimitedanddetailedunderstandingofspecificprocessesaf-fectingwaterqualityisneeded.Inthisstudy,aDispersedAlkalineSubstratesystem(consistingofananaerobicandaerobicsystem)wasconstructedasapilotsystemtotreatacidminedrainage(AMD)fromanabandonedcoalmineineMalahleni,Mpumalanga.
TheDispersedalkalinesubstratesystemisamixtureofwoodshavings,limestone(finegrained)andmanure.Inflow-outflowwaterqualityanalysesdemonstratedsubstantialmetalandSulfatesremovalinthewholesystemforSO42-,Al,Fe,NiandZn.Thesystemwasoperatedatlowflowratesinordertoachievelongerresidencetimeinthereactivetanks.TherewasminimalofMninthesystemandthismaybeattributedtothepresenceofFeintheoxidationpondandaerationpond,whichtendtocompeteforoxygenconsumption.
Posters
3. Title:ARSENICSPECIATIONBYIONCHROMATOGRAPHYINWATERANDWASTEWATERSAMPLES
Mr Sandile Langa
Abstract::Multipleacuteandchronictoxicityofarsenicspeciesanditsmobilisationfromgeologicaldepositsintogroundanddrinkingwaterresourcesareoneofthegreatestthreatstohumanhealth.Arsenicspeciationanalysis,mostlydonebyliquidchromatography,isachallengingtaskwhichrequiresanintensehighqualityworkwithrespecttoextraction,preservation,separation,detectionandvalidation.AgrowingnumberofAs-speciesandlowregulatorylimits(10μg/L)mayrequiremorethanonespeciationmethodpreferablyperformedbyspeciesspecificproceduresanddetectors.Generally,arseniccompoundshavenosignificantmarketvalue,buttheyneedtoberemovedfromprocessstreamsbecauseofenvi-ronmentalorprocessspecificpurposesHoweverthefocusonthisprojectisonionchromatographicseparations,themostfrequentlyusedmethods.BasedonIC-principlesthemethodsappliedarecriticallydiscussedandrecommendationsgivenwhichshouldresultinmorerobustandreliableAs-specia-tion.TheequipmentusedwasMetrohmionchromatographfittedwitha20µLand100μLsampleloopformg/Landµg/Llevelsrespective-ly,MetrosepAsap4/5guardcolumn(5x4.0mm)andMetrosepAsuppseparatorcolumn(250x4.0mm)wereused.Theexperimentwasconductedusinganeluentof3.2mMsodiumcarbonateand2.0mMsodiumhydrogencarbonateat0.7mL/minflowrate.Theionchromatographyconsistedoftwodetectors:conductivitydetectorandtheUV-visdetector.SoftwareusedfordataacquisitionwasMagICNet.
4. Title:DETERMINATIONOFTHORIUMANDURANIUMINURINEBYICP-MS
Mr Sandile Langa
Abstract:ThoriumandUraniumquantificationisimportanttomonitorhumanexposuretotheseelements.Urinesampleswereanalysedtodetermineexposure.ICP-MSwasusedforquantitativedeterminationofThandUconcentrationinurine.Thesampleswerestoredandpreservedbyadding5%nitricacid.A10Xdilutionofurinesamplewasacidifiedwith5%ultra-purenitricacidthenshakenvigorouslyfollowedbytheadditionof100µLiridium(Ir)asaninternalSTDintoa15mLsamplevials.Thepreparedsampleswerethendigestedina;waterbath(900C)for30minutesandthelefttocooltoroomtemperature,versusul-trasonicbathfor30minutes.Themethodhadadetectionlimitof1pptinurineforbothThoriumanduraniumwitharelativestandarddeviation(SD)oflessthan20%.
Posters
Early bird: Endson30September2016–R825Normal registration:Startson1October2016–R935Students:R715(proofofstudentregistrationtobeemailedorfaxed)SASS Member:R803Registration: Online: http://www.mintek.co.za/2016/05/18/6th-annual-symposium/forthesymposiumregistration-formviaMintekwebsiteoralternatively,completetheattachedformandsendtoemail(seecontact)orfaxto+27117094006Closing date for registration: 19October2016
Exhibitors: Aspaceofabout2mx2mfloorspacewillbeprovidedforyourdisplays,standardtablewith,MINTEKtablecloth,twochairsandentranceintothesymposiumpresentationswithluncheonandrefreshmentsfortwopeopleonly.Price per stall: R3260excl.VAT.Closing date: 19October2016
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2. At the Buccleuch interchange (104), keep left and follow the sign N3 Germiston/Durban
3. Keep right at the fork, following the sign Roodepoort/Bloemfontein/N1 and merge onto N1 Western Bypass
4. Take the Malibongwe Drive offramp (R512/Randburg), Turning left into Malibongwe Dr
5. Turn right into Mintek (200 Malibongwe Drive)
FROM: M1 Johannesburg
1. Take exit 14B for Saint Andrews Road toward Parktown/Johannesburg
2. Turn right into St Andrews Rd 3. Turn right into Jan Smuts Ave and drive along Jan Smuts Ave until you reach Republic Rd 3. Turn left into Republic Rd 4. Turn right into Malibongwe Dr
5. Turn left into Mintek (200 Malibongwe Drive)
11th Ave
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