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1

Efficiency of non-ionic surfactant removal in biological sewage treatment plants

100%
Traczyk L., Szymanski A., Wyrwas B., Jaroszynski T., Lukaszewski Z.
Polish Journal of Environmental Studies
|
2006
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tom 15
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nr 3
The removal of non-ionic surfactants (NS), as well as a long-chained ethoxylates, short-chained NS and poly(ethylene glycols)(PEG), was investigated in two sewage treatment plants (STP) of the activated sludge type and one trickling filter type. The indirect tensammetric method (ITM), and the ITM combined with the Bismuth Active substances (BiAS) separation scheme (BiAS-ITT) were used for the determination of NS and their metabolites. on average, 85% reduction of total Ns was determined in the activated sludge type STP and 53% reduction in the case of the trickling filter type STP. significant concentrations of NS metabolites (short-chained NS and PEG) were determined in raw sewage, which indicate that NS biodegradation had already started in the sewer system. Both tensammetric methods prove to be a useful tool in monitoring Ns and their metabolites in STP.
2

Surfactants in the River Warta: 1990-2000

100%
Szymanski A., Wyrwas B., Jesiolowska A., Kazmierczak S., Przybysz T., Grodecka J., Lukaszewski Z.
Polish Journal of Environmental Studies
|
2001
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tom 10
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nr 5
Data concerning the systematic determination of anionic surfactants (AS) and non-ionic surfactants (NS) over the period 1990-2000 in a single sampling point (Poznan) is reported, as well as data concerning the determination of these surfactants along the whole of the River Warta measured in 1997-1999. The indirect tensammetric method was applied for the determination of non-ionic surfactants, while the MBAS method was applied for the determination of anionic surfactants. The: average concentration of NS over the period 1990-2000 showed a highly increasing tendency, from approximately 25 mug l(-1) to approximately 150 mug l(-1). The average spring-summer concentration of AS over this period fluctuated around the value of 140 mug l(-1), while autumn-winter average concentrations showed a gradual decrease in average concentration over the last five years, from approximately 300 mug l(-1) to approximately 150 mug l(-1).
3

Biodegradability of detergent powder surfactants in the river water die-away test

86%
Siwinski P., Szymanski A., Lukaszewski Z.
Polish Journal of Environmental Studies
|
1998
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tom 07
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nr 4
A modified river water die-away test is developed for controlling the biodegradability of anionic surfactants (AS) and non-ionic surfactants (NS) of detergent powders. The tested powder undergoes a procedure replicating the washing process. An aliquot of the final solution is introduced into river water exhibiting good biodegradative ability. Primary biodegradation of both types of surfactant is monitored over 20 days and the MBAS method used for determining AS and the indirect tensammetric method for NS. Twelve detergent powders purchased in Polish supermarkets in 1995 are analysed. AS in all tested powders exhibit a relatively fast and complete biodegradation. NS are very diverse in terms of biodegradability: two powders had NS not satisfying the 80% biodegradability limit.
4

Nonionic surfactants in liquid laundry detergents for automatic laundry washing machine

72%
Bocho-Janiszewska A.
Towaroznawcze Problemy Jakości. Polskie Towarzystwo Towaroznawcze
|
2015
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nr 2
5

Examination of biodegradation of hydrocarbons in emulsified systems

58%
Bielicka K., Kaczorek E., Olszanowski A., Voelkel A.
Polish Journal of Environmental Studies
|
2002
|
tom 11
|
nr 1
This paper presents the biodegradation process carried out in water samples. Aliphatic hydrocarbons were degraded in the presence of the emulsifier. Non-ionic surfactant was used as the emulsifier. Two bacteria strains from the Pseudononaceae family were used in this process. We used Solid-Phase Extraction and gas chromatography for qualitative and quantitative determination of the components of the biodegradation process.
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