含砷金矿的蜈蚣草除砷预处理初步研究

32820104武汉理工大学学报JOURNALOFWUHANUNIVERSITYOFTECHNOLOGYVol.32No.8Apr.2010DOI:10.3963/j.issn.16714431.2010.08.016王海娟1,宁平1,张泽彪2,唐兴进3,曾向东1,王宏镔1,瞿广飞1,姜永利1(1.,650093;2.,650093;3.,550005):高砷金矿通常为难浸提金矿,因而除砷预处理成为加大金回收提取效率的关键一步研究通过在砷金矿种植砷超积累植物蜈蚣草来提取去除砷,并且利用EDTA亚硫酸氢钠磷酸二氢铵碳酸氢钠柠檬酸和硝酸铵6种不同试剂各3个浓度梯度进行调控淋洗,以期找出对于砷提取有效的调控剂结果表明,在所研究的活化试剂中除磷酸二氢铵处理下植物去除砷的效率与对照无明显差异外,其余5种试剂对于蜈蚣草除砷均有一定的强化功能,其中EDTA和碳酸氢钠对于活化砷促进植物吸收有较大作用,而柠檬酸对于蜈蚣草生物量的促进作用效果更明显:含砷金矿;砷超积累植物;蜈蚣草;植物提取:X37:A:16714431(2010)08005905PretreatmentofArsenicGoldOrebyPterisvittataL.WANGHaijuan1,NINGPing1,ZHANGZebiao2,TANGXingjin3,ZENGXiangdong1,WANGHongbin1,QUGuangfei1,JIANGYongli1(1.FacultyofEnvironmentalScienceandEngineering,KunmingUniversityofScienceandTechnology,Kunming650093,China;2.FacultyofMaterialsandMetallurgicalEngineering,KunmingUniversityofScienceandTechnology,Kunming650093,China;3.ChinaNationalGoldGroupGuizhouCoLtd,Guiyang550005,China)Abstract:Itisusuallydifficulttoextractgoldfromarsenicgoldore,whichrequirestheremovalofarsenicinordertoincreaseextractionefficiencyofgoldfromarsenicgoldore.Forthispurpose,PterisvittataLwasgrowninthearsenicgoldoreinpotexperiment.PterisvittataL.wasleachedbyethylenediaminetetraaceticaciddisodiumsalt(EDTANa2),ammoniumphosphate(NH4H2PO4),sodiumbisulfite(NaHSO3),citricacid(C6H8O7),sodiumbicarbonate(NaHCO3),ammoniumnitrate(NH4NO3),anddeionizedwater(ascontrol),respectively.Thetestedarsenicgoldorewasleachedbytheabovesixeluentswithdifferentconcentrations.Inaddition,AsabsorptionandconcentrationinthefrondsofPterisvittataL.underpottrialconditionwasalsoexamined.TheresultsshowthatthearseniccontentionofPterisvittataL.wasallincreasedunderalleluentsexceptNH4H2PO4.ItisobviousthattheAsextractionofPterisvittataL.increasedbyEDTANa2andNaHCO3treatment.However,biomasshasmorechangesthanextractionefficiencyundercitricacid(C6H8O7)treatment.Keywords:arsenicgoldore;arsenichyperaccumulator;PterisvittataL.;phytoextraction:20091117.:(30600081),(07Y40691),(2009CD033).:(1979),,.Email:[e-mail],,,,,[1,2],,,,,,,,[3,4],,,,(PterisvittataL.)(PteriscreticaL.)[57],[8],,,,,,,,,,63,,,,,,11.1,1984,AsAuAgCaMgFeCSiAl1.21.2.1,24km1.2.2,,,3d,,1.2.37d,1,25mL,40,20d1L,16,1/(mol!L-1)EDTANa2NH4H2PO4NaHSO3C6H8O7NaHCO3NH4NO30.0010.010.010.0020.050.050.0050.050.050.0050.10.10.010.10.10.010.20.21.31,,4,3,1~3mL,,,90∀0.5h,110∀0.5h,127∀1h,,1h25mL60201041.4,(GB/T17134#1997)As22.122,,CPKSZnCaMg,2/(mg!kg-1)(%)Auw(As)/%Pbw(Ca)/%Mgw(Fe)/%w(C)/%w(S)/%SiPKCuMnZn3.80.851668.929411.449.412.881030521574053.7452588.692.27d,,,,33,,,,EDTA,,,,,###pH3/cm/g/cm/g/cm/gEDTANa29.5∃3.20.087∃0.0213∃0.50.028∃0.017.8∃4.10.056∃0.02419.3∃100.13∃0.0756∃4.30.097∃0.0438.2∃2.10.1∃0.01415.8∃12.20.089∃0.03613.5∃30.159∃0.03615∃2.60.293∃0.02114∃5.30.094∃0.0129.2∃1.30.084∃0.02318.8∃6.20.103∃0.03611.2∃9.30.445∃0.0693∃0.670.048∃0.01311.9∃6.40.069∃0.03228.4∃11.60.16∃0.1221∃6.10.619∃0.10418.5∃7.10.14∃0.01921∃20.124∃0.05####2.31(a),,,EDTA(p=0.00530.01)(4)As,EDTANa2,As,,,EDTANa2,,,,EDTA,,,,EDTA,5,61328,,,:,,,,,NaHCO3,2As2S3+2NaHCO3=NaAsO2+Na2AsS2+2CO2+H2O2.4,As1(b),,EDTANa2,As,1mg,,,,,,,2,,pH7.5,,,CaMgAs,,,,3a.,,;b.,,,,,,;c.,NaHSO3,,,Na+,d.,5,,,,,,,6220104,,,,,,,,,,,e.,,,,f.,,,,,,,,,,,,,,,,,,[1].[M].:,2005.[2],,.[J].,2006(3):2025.[3].[J].,2001(1):5.[4],,.[J].,2004,41(11):1418.[5]ChenTB,WeiCY,HuangZC,etal.ArsenicHyperaccumulatorPterisVittataLandItsArsenicAccumulation[J].ChineseScienceBulletin,2002(47):902905.[6],,,.###[J].,2002,22(5):777778.[7]WangHB,WongMH,LanCY,etal.UptakeandAccumulationofArsenicbyElevenPterisTaxafromSouthernChina[J].EnvironmentalPollution,2007(145):225233.[8],,,.:[J].,2004,24(3):455462.63328,,,: