膜生物反应器浸出镍钼矿

黉槊AvaIIableOnIineat、^n^n^f．SCiencedIreCt．cOm。一∥矽姆静I：秽ScienceDirectTrans．NonferrousMet．Soc．China2l(2011)1395—140lTtansactions0fNonferrousMetalsSocie够ofChina■■■■●_■■_●●●_■_■●■■■■■●■●●■■■●wWw．tnmsc．cnLeachingofnickel—m01ybdenumsulfideoreinmembranebi0109icalreactorcHENJia—wul一，GAOCong—jiel，zHANGQi．xiul，xIA0Lian．shen91，zHANGGui．qin911．SchoolofMetallurgicalScienceandEngineering，CentralSouthUniversit)r，Changsha410083，China；2．DepanmentofEnVironmentalEngineering，HunanBiologicalandElectromechanicalP01ytechnic，Changsha410127，ChinaReceiVed25June20l0；accepted21October2010Abstract：Thebioleachingofmolybden啪fromitssulfideoreusingaMo．resistantthemophilicbacteriums“肋肠6“s朋已胁肼船combinedwithamembranebiologicalreactor(MBR)wasstudied．TheexperimentalresultsshowedthatmeconcentrationofMocanbecontr01ledbyfilterofthemembraneinMBRandthetoxici田ofMotomicroorganismisdecreasedintheprocessofbioleachiIlg．Itwasalsoevidencedthatthereweredif凳rent1eachingratesofNiandMowhentheconcentrationofMowasdif允rent．A矗erleachingfor20dintheMBRatMoconcentmtionof395mg／L，the1eachingratesofNiandMoreachedthemaximumof79．57％and56．23％respectivelyundertheconditionsof100g／Lofmineraldensity，65。C，pH=2and1．0L／minoftheaerationmte．While75．59％Niand54．33％Mowereleachedoutincolumnwithoutmembraneunderthesameconditions．Keywords：membmncebiologicalreactor；nickel—molybdenumsulfideore：sulfolobusmetallics：bi01eachin2；molvbdenumtoxicity1IntroductionMolybdenum(Mo)isanimportantelementinmodemindustrv．Traditionallv，Moisex打actedf．romitsorebythecombinationofpyro．andhydro．metallurgies．Inrecentyears，bioleachinghasbecomethenagshipduetoitsgreatpotemialinsimplicitVandeco．f．riendlVoperation．However，theapplicationofbi01eachingiscon仃ontedwiththelowextractionefficiencvbvcurrenttechn0109y[1]．A10tofinvest培ations[2—5]havebeenperfb册edonex仃actingMof}om10w．2rade】Ⅵosulfideorewiththe』W西Dp办f彪，butendedupforverv10wleachingratesof】Ⅵoandrelatively10ngleachingcycle．TONG『61andDONATIetalf7]used爿c翮f而i06acf，，zfs尼，．阳DxZ砌胛sto1eachthe10w．gradesul6deorecontainingCuandMo，andmeleachi