重非水相液体性质对非离子表面活性剂增溶作用的影响
INFLUENCES OF PROPERTIES OF DENSE NON-AQUEOUS PHASE LIQUIDS ON SOLUBILIZATION BY NONIONIC SURFACTANT
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摘要: 在油水比1:40的条件下,浓度为200—10000mg·l-1的非离子表面活性剂TritonX-100(TX100)对三氯乙烯(TCE)、氯苯(CB)、1,2-二氯苯(1,2-DCB)、1,3-二氯苯(1,3-DCB)、四氯乙烯(PCE)和三氯乙烯-四氯乙烯混合物(TCE-PCE,1:1,V:V)的增溶作用表明,TX100在试验浓度范围内,对TCE,CB和1,2-DCB均无明显增溶作用,当TX100浓度分别大于6000,4000和800mg·l-1时,对1,3-DCB,TCE-PCE和PCE具有显著的增溶作用.TX100在TCE,CB,1,2-DCB,1,3-DCB,TCE-PCE及PCE有机相/水相间的分配系数(lgKd)分别为3.60,3.36,3.38,3.26,3.17和2.07,分配系数和分配损失的大小与油-水界面张力呈负相关.Abstract: In this paper,the solubility enhancements of dense non-aqueous phase liquids(DNAPLs),trichloroethene(TCE),chlorobenzene(CB),1,2-dichlorobenzene(1,2-DCB),1,3-dichlorobenzene(1,3-DCB),tetrachloroethene(PCE) and the mixture of TCE and PCE(TCE-PCE,1:1 V:V) by a nonionic surfactant,Triton X-100(TX100) were presented,given the 1:40 of phase ratio and the initial TX100 concentrations from 200 to 10000 mg·l-1.It was shown that no water solubility enhancements of TCE,CB and 1,2-DCB was observed.The significant solubilization was observed for 1,3-DCB,TCE-PCE and PCE respectively when TX100 concentration was larger than 6000,4000 and 800 mg·l-1,respectively.TX100 partitioning into non-aqueous phase dictated the solubilization extent.The values of the partitioning coefficients of TX100 between non-aqueous and aqueous phase,lgKd,were 3.60,3.36,3.38,3.26,3.17 and 2.07 for TCE,CB,1,2-DCB,1,3-DCB,TCE-PCE and PCE respectively.Partitioning coefficients and partitioning losses of TX100 were negatively related to the interfacial tension(IFT) between non-aqueous phase liquid and water.
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Key words:
- surfactant /
- dense non-aqueous phase liquids /
- solubilization /
- partitioning
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[1] Ramsburg C A,Pennell K D,Density-Modified Displacement for Dense Nonaqueous Phase Liquid Source Zone Remediation:Density Conversion Using a Partitioning Alcohol[J] .Environ.Sci.Technol.,2002,36(9):2082-2087
[2] Ramsburg C A,Pennell K D,Kibbey T C G et al.,Use of a Surfactant-Stabilized Emulsion to Deliver 1-Butanol for Density-Modified Displacement of Trichloroethene[J] .Environ.Sci.Technol.,2003,37(18):4246-4253
[3] West C C,Harwell J H,Surfactant and Subsurface Remediation[J] .Environ.Sci.Technol.,1992,26 (12):2324-2330
[4] Harwell J H,Sabatini D A,Knox R C,Surfactants for Ground Water Remediation[J] .Colloids and Surface A:Physicochemical and Engineering Aspects,1999,51(1-2):255-268
[5] Lee M,Kang H,Do W,Application of Nonionic Surfactant-Enhanced in Situ Flushing to a Diesel Contaminated Site[J] .Water Research,2005,39(1):139-146
[6] Kim E S,Lee D H,Yum B W et al.,The Ionic Strength and Hardness of Water on the Non-ionic Surfactant-Enhanced Remediation of Perchloroethylene Contamination[J] .J.Hazard.Maters.,2004,119(1-3):195-203
[7] Zhou M F,Rhue R D,Screening Commercial Surfactants Suitable for Remediation DNAPL Source Zones by Solubilization[J] .Environ.Sci.Technol.,2000,34(10):1985-1990
[8] Kile D E,Chiou C T,Water Solubility Enhancements of DDT and Trichloroethylene by Some Surfactant below and above the Critical Micelle Concentration[J] .Environ.Sci.Technol.,1989,23(7):832-838 -
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