Abstract
Hard water can decrease the detergency efficiency of surfactants due to a significant concentration of divalent cations as Ca2+ or Mg2+. The formulation of a cleaning detergent must be modified and it is usual to add more surfactants or a huge quantity of sequestrating agents. This supplementary addition can have deleterious effects on the environment and increases the price of the formulation. A surfactant, presenting both detergency capacities in the presence of Ca2+ and Ca2+ chelating properties, would be of great interest. In this paper, we report on Ca2+ extraction with sugar-based chelating surfactants using an experimental device, namely a flotation column, as both chelating properties and foaming properties in the presence of Ca2+ are important in the flotation process as well as in detergency. Among all the sugar-based surfactants tested, a few of them were able to extract calcium and thus demonstrated the expected characteristics.
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Acknowledgments
The authors are indebted to DGA (fellowship to N. F.), Universidad de Buenos Aires, Centre National de la Recherche Scientifique (CNRS) and Ministère délégué à l’Enseignement Supérieur et à la Recherche for financial support. This work was also supported by a Binational Cooperation France-Argentina, CNRS and Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET).
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Ferlin, N., Grassi, D., Ojeda, C. et al. Calcium Chelating Sugar-Based Surfactants for Hard-Water Detergency. J Surfact Deterg 15, 259–264 (2012). https://doi.org/10.1007/s11743-011-1310-3
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DOI: https://doi.org/10.1007/s11743-011-1310-3