50 Years of Environmental Monitoring at Henkel / T. Wind in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 45, N° 3/2008 (05-06/2008)

[article]  inTENSIDE, SURFACTANTS, DETERGENTS > Vol. 45, N° 3/2008 (05-06/2008) . - p. 144-152 Titre : 50 Years of Environmental Monitoring at Henkel Type de document : texte imprimé Auteurs : T. Wind, Auteur ; J. Steber, Auteur ; J. Tolls, Auteur Année de publication : 2008 Article en page(s) : p. 144-152 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cours d'eau -- Salubrité Eaux usées -- Epuration Environnement -- Surveillance Surfactants Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : The gradually increasing detergents consumption in Germany since 1950 resulted in higher emissions of their ingredients to the environment. The first generation of mineral oil-based surfactants, tetrapropylene benzene sulfonate (TPS), exhibited poor biodegradability and caused public environmental concerns. These prompted Henkel in 1958 to start a systematic measurement of some main detergent constituents in the river Rhine in Germany. Since then, a number of monitoring activities regarding the determination of detergent ingredients concentrations and freights in rivers and waste water treatment plants (WWTP) followed. This paper summarizes 50 years experience at Henkel in monitoring of detergent ingredients in the aquatic environment. The long-term monitoring results on the river Rhine provides an impressive record of the development of the environmental burden by surfactant emissions and of the gradual improvement of river water quality over time. The reasons for the changes are discussed. Further monitoring activities on WWTPs have shown for the first time, that domestic wastewater treatment plants (DWTP) are similarly suitable for the removal of surfactants like municipal ones. The good removal of prominent organic detergent ingredients was shown by several time-proportional sampling campaigns in municipal WWTPs. Finally the positive impact of the modernisation of a municipal WWTP on the chemical and biological water quality on a small river creek is reported over the time period of 7 years. All of the reported studies indicate a low environmental burden due to the use of detergents ingredients today. The learnings from the different activities in environmental monitoring by Henkel have contributed to a solid understanding of the fate of detergent ingredients in the environment. This in turn was the prerequisite for development of reliable exposure prediction models. Today, Henkel employs both, environmental monitoring and modeling instruments, for assessing the environmental exposure of chemicals. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3048 [article]

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Anaerobic Biodegradation of Surfactants – Scientific Review / J. L. Berna in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 44, N° 6/2007 (12/2007)

[article]  inTENSIDE, SURFACTANTS, DETERGENTS > Vol. 44, N° 6/2007 (12/2007) . - p. 312-347 Titre : Anaerobic Biodegradation of Surfactants – Scientific Review Type de document : texte imprimé Auteurs : J. L. Berna, Auteur ; G. Cassani, Auteur ; C.-D. Hager, Auteur ; N. Rehman, Auteur ; I. Lopez, Auteur ; D. Schowanek, Auteur ; J. Steber, Auteur ; K. Taeger, Auteur ; T. Wind, Auteur Année de publication : 2008 Article en page(s) : p. 312-347 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Surfactants -- Biodégradation Tags : Anaerobic  biodegradation  biodegradability  Wastewater  treatment  Screening  tests  Simulation  sediment  Monitoring  data Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : The anaerobic biodegradation of surfactants is used as an acceptability criterion in some environmental pieces of legislation (eco-label, risk assessment, etc.), without a proper evaluation of the relevance of such a characteristic. Available screening test methods to assess the anaerobic biodegradation do not simulate the real conditions prevailing in these anaerobic compartments but rather reflect more stringent conditions, due to the high test substance/biomass ratio, possibility of inhibitory effects and limited possibility for adaptation. Therefore positive results are indicative of a similar behaviour under environmental conditions, while a negative result cannot be necessarily interpreted as inherent anaerobic recalcitrance. The majority of surfactants entering the environment will be exposed to and degraded under aerobic conditions, and only less than 20% will potentially reach temporarily anaerobic environmental compartments. In contrast to the well documented adverse effects observed in the absence of aerobic biodegradation, the lack of anaerobic biodegradation does not seem to be correlated with any apparent environmental problem for most compartments after more than 40 years of widely use of such products. The scientific review concluded that anaerobic biodegradability does not have the same environmental relevance as the aerobic one. Anaerobic biodegradability should not, therefore, be used as a pass/fail property for the environmental acceptability of surfactants which are readily biodegradable under aerobic conditions. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3195 [article]

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