Entwicklung und Anwendung einer Mikroemulsion zur in-situ-Extraktion von polychlorierten Biphenylen aus Böden
Entwicklung und Anwendung einer Mikroemulsion zur in-situ-Extraktion von polychlorierten Biphenylen aus Böden
For the extraction of polychlorinated biphenyls a microemulsion consistmg of biological decomposable components is developed. The microemulsion remains stable at temperatures around 10°C. Therefore it is possible to use the microemulsion with its excellent extraction properties in the in situ soil r...
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Personal Name(s): | Dierkes, F. (Corresponding author) |
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Contributing Institute: |
Publikationen vor 2000; PRE-2000; Retrocat |
Imprint: |
Jülich
Forschungszentrum Jülich, Zentralbibliothek, Verlag
1999
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Physical Description: |
X, 131 p. |
Document Type: |
Report Book |
Research Program: |
Addenda |
Series Title: |
Berichte des Forschungszentrums Jülich
3679 |
Link: |
OpenAccess OpenAccess |
Publikationsportal JuSER |
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245 | |a Entwicklung und Anwendung einer Mikroemulsion zur in-situ-Extraktion von polychlorierten Biphenylen aus Böden | ||
260 | |a Jülich |c 1999 |b Forschungszentrum Jülich, Zentralbibliothek, Verlag | ||
300 | |a X, 131 p. | ||
490 | 0 | |a Berichte des Forschungszentrums Jülich |v 3679 | |
520 | |a For the extraction of polychlorinated biphenyls a microemulsion consistmg of biological decomposable components is developed. The microemulsion remains stable at temperatures around 10°C. Therefore it is possible to use the microemulsion with its excellent extraction properties in the in situ soil remediation. The microemulsion system consists of equal amounts of water (with addition of calcium chloride) and rape oil methyl ester. Sodium bis (2-ethylhexyl) sulfosuccinate (AOT) and 2,5,8-trimethylnonylhexaglycolether(Tergitol TMN 6$^{®}$) are used as amphiphilic compounds. At low temperatures the undesired formation of liquid crystals in the microemulsion can be suppressed by increasing the electrolyte concentration in the water phase, but is leading to an unfavourable shift of the phase boundaries of the system. The substitution of a part of the nonionic surfactant by an ethoxylated castor oil suppresses the formation ofliquid crystals. The extraction performance of the microemulsion system is investigated with doped soils inbatch and glass column experiments. The results show that the contaminant is removed nearly completely from the arable soiL Extraction rate is lower on sandy soiL The microemulsion system can be splitted specifically into an oil phase and a water phase byincreasing the temperature. From the technical point of view he reuse of the water phase is uncritical, but legislative problems can arise. | ||
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