NaClH2SO4法回收CODCr废液中的硫酸银

2009\2\122009\2\122009\2\12NaCl-H2SO4CODCr2l0048NaCl-H2SO4CODCr80.5%。4CODCrCODCr。、。CODCrX781A1674-0912200912-0029-031980-、。NaCl-H2SO4CODCrCODCr。CODCrCODCr0.15g1.25g。6.4/g。。CODCr。:CODCr31HCl-H2SO4[1]HClH2SO42--[2]CODCr3NaCl-Na2CO3-H2SO4[3]。CODCr1NaCl-Zn[4],CODCr2NaCl-NH3·H2O-Zn[5]3-[6]。NaCl-H2SO4CODCr。11.1Ag2SO4+2NaCl→2AgCl+Na2SO42AgCl+H2SO4→Ag2SO4+2HClCODCr。98%。1.2JAR-2CODCr、PHS-3CpH、、、SHZ-D、CODCr500mg/L、CODCr500mg/L、、、98%、。1.3CODCr。、Δ29RENEWABLERESOURCESANDRECYCLINGECONOMY2009Vol.2.No.12RENEWABLERESOURCESANDRECYCLINGECONOMY2009Vol.2.No.12RENEWABLERESOURCESANDRECYCLINGECONOMY2009Vol.2.No.12。98%、。1.4=×100%22.1NaCl200mLCODCrNaCl。NaClAg+Cl-AgCl。1NaCl2～3Ag+。2.2。,320℃。2.3、、。120～22min20min。2.42NaCl-H2SO4CODCr73.8～88.3％。2.54CODCr2.5.12.5.2CODCr500mg/L42.5.353CODCrAg2SO4CODCr/mg·L-1500514511504509507/%02.82.20.81.81.4Ag2SO41NaClAgClg123456NaCl0.06770.13610.27070.40580.54190.6771AgCl0.17270.30340.29320.29530.29180.290321234Ag2SO4/g5.80005.80005.250013.7715/%80.679.688.373.8Ag2SO4/g4.67734.61424.637710.16304CODCrAg2SO4CODCr/mg·L-1500497500513498501505/%0-0.60.02.6-0.40.21.0Ag2SO4NaCl-H2SO4CODCr302009\2\122009\2\122009\2\12NaCl-H2SO4methodappliedtosilversulphatefromwastewaterafterCODCrdeterminationZHAIJianJIANGChunhuaDepartmentofAppliedChemistryNanjingCollegeofChemicalTechnologyNanjing210048ChinaAbstract:NaCl-H2SO4methodwasappliedtorecoveryofsilversulphatefromwastewaterafterdeterminationofCODCr.Therecoveryratereached80.5%.Comparativeexperimentsweremadebetweenreoveredandcommerciallyavailablereagentsonfourkindsofwastewater.Withdataanalysis,therecoveredreagentsmettherequirementthatcanberecycledforCODCrdetermination.Thismethodwaseasytooperateandhadhighrecoveryratewithlowcost.Keywords:wastewaterafterCODCrdetermination;silversulphate;recovery2009－11－102.5.463~6、、、CODCrCODCr。2.673NaCl-H2SO4CODCrNaCl2～3Ag2SO4320℃20min80.5％。、、、CODCr。NaCl-H2SO4CODCr。1g1.1716.4NaCl-H2SO4CODCr。[1].CODCr[J].199012(5)59-60.[2].CODCr[J].2007(5)34-35.[3].CODCr[J].2002(2)41-42.[4].CODCr[J].19891(3)46-47.[5].-COD[J].199515(6)355-359.[6].CODCr[J].19948(3)186-187.71g0.0090.910.250.0021.1716.41g6CODCrAg2SO4Ag2SO4CODCr/mg·L-1153.5155.0155.0160.4152.7154.3/%-1.1-0.1-0.13.4-1.6-0.6CODCr/mg·L-1155.2155.25CODCrAg2SO4Ag2SO4CODCr/mg·L-12396.72253.82261.82285.62222.12345.9/%5.2-1.0-0.70.3-2.43.0CODCr/mg·L-12277.72277.7NaCl-H2SO4CODCr31