高盐废水中化学需氧量测定方法的研究邓保军

CHEMICALANALYSISANDMETERAGE22120131Vol.22No.1Jan.201363doi10.3969j.issn.1008–6145.2013.01.018121331.2500142.2500133.250031CODCr–CODCr800mgL30min5.0%1.29%CODCrCODCrO661.1A1008–6145(2013)01–0062–04ResearchontheDeterminationofCODCrinHighSalinityWastewaterDengBaojun1,LüBaoguo2,WangGang1,LiuLihui3,ZhangYuzhai3(1.JinanEnvironmentalMonitoringCenter,Jinan250014,China;2.ShandongPharmaceuticalIndustryDesigningInstituteJinan250013China;3.NorthMathrialScienceandEngineeringTechnologyGroupCorporation,Jinan250013,China)AbstractRegardingtheinterferenceofthechlorineinhighsalinitywastewateronthedeterminationofCODCr,themethodofsealeddigestion-ammoniumferroussulfatewasreasearched.TheresultshowedthatforthehighsalinitywasterwatersamplesofCl–lessthan800mgL,themethodofclosedvesseldigesting30min,andthentheammoniumferroussulfatetitration,hadhighaccuracyandprecisionandtherelativeerrorwaslessthan5.0%,therelativestandarddeviationwasnotmorethan1.29%.Relationtothemethodofnationalstandard,thismethodhadtheadvantagesoflowen-ergyconsumption,lesspollutiontoenvironmentalandshortoftime-consuming,whichwassuitableforthemeasurementofCODCrinthehighsalinitywastewater.Keywordshighsalinitywastewater;chloridion;CODCr;sealeddigestionmethodCODCr121000mgL3CODCrCODCr11.1DP–16050mL250mL16K2Cr2O70.1000molL1052h4.903g1000mL0.05molL1052h4.903g2000mL0.005molL2g(NH4)2Fe(SO4)2·6H2O5mL1000mL1.4580gEmail:[e-mail]2012–11–142013221640.6950g100mL–1L1.84gmL10g12dCOD2000mgL1052h0.8502g1000mL1.2mgLCr2O72–+C+H+Cr3++CO2+H2OFe2++Cr2O72–+H+Fe3++Cr3++H2O435CODCr1.3(1)3mL25mL2mL5mL–16030min(2)150mL20mL3(3)225mL0.0050molLV13.00mLV01.4CODCrCODCr(O2mgL)CODCr=V0V1c81000VV0mLV1mLVmLcmolL821Ogmol22.163mL200mgLCOD160202530354050min3COD11CODminCODmg·L–1CODmg·L–1)%%RSD%20132.3134.6137.3134.767.432.61.8625163.5166.0169.3166.383.116.91.7430197.5198.9199.3198.699.30.720.4835199.6197.6198.9198.799.40.650.5140199.4198.7197.8198.699.30.700.4050201.3196.9198.3198.899.40.581.13130minCOD30min99%COD0.72%RSD0.48%30min2.2200mgLCOD–COD222.00mL3.00mL–5.0mLCOD0.9%1.05%652.3COD33COD(mol·L–1)Cl–(mg·L–1)COD(mg·L–1)0.0510001.020002.150007.81000014.70.25100010.5200016.4500025.71000057.93CODCr1.02.17.814.7mgL10.516.425.757.9mgLCl–7200500800100020005000mgLCOD100mgLCOD44800mgL5.0%1.29%1000mgL800mgLCOD800mgLCl–COD82.47COD554CODmg·L–1Cl–mg·L–1mg·L–1%RSD%100099.699.2100.80.40.80.80.83200102.5101.0101.52.51.01.50.75500101.8103.4102.91.83.42.90.80800104.2105.0103.94.25.03.91.291000106.9108.5108.06.98.58.00.762000126.3119.9135.226.311.935.26.045000189.2176.4160.989.276.460.98.075COD(mg·L–1)(mg·L–1)%70.263.84.889.586.31.858.850.57.6103.0107.42.1137.0129.82.71191.0189.20.5250.346.44.0COD10%COD3(1)CODCOD(2)800mgLCOD5.0%1.29%(3)2mLCODmLmLCOD(mg·L–1)COD(mg·L–1)%RSD%2.03.05.0202.1203.7199.5201.80.91.052.05.07.0202.8202.8201.7202.41.20.313.03.07.0189.1189.1191.8190.05.00.823.05.07.0182.3183.9187.2184.57.81.3520132216630min120min1.M.42012:211–213.2.J.20056(8):42–45.3.J.2009(6):209–212.4.J.200928():114–118.5.–J.201128(5):2662–2665.6.–J.201120(1):56–58.7.–J.200716(3):44–46.8ChenJMPanTCHuangCW.Amodifiedsealedoven-UVmethodofCODdeterminationJ.JpnJToxicolEnvironHealth199440(4):338–343.CN102809627A2012.12.0558%63%58%63%CN102809545A2012.12.05–CN102818780A2012.12.12(1)(2)TCN102786563A2012.11.21(1)4080(2)(3)(4)(5)–––CN202599825U2012.12.12