The purpose of this work was to synthesized sodium metasilicate, a non-phosphate builder in detergent formulation that can replace the sodium tripolyphosphate (STPP) which is not environmentally friendly because phosphates are excellent fertilizer for algae, bacteria, and other flora and fauna in rivers, lakes and oceans, making them bloom at very rapid rates, exhausting the oxygen supply both in the surface and in the bottom layers of water bodies, and killing fish. This phenomenon is called eutrophication. Sodium metasilicate as a non-phosphate builder from Lokoja Quartzite was used to formulate a non-phosphate biodegradable synthetic detergent using 25%, 50% and 75% sodium hydroxide concentrations. The CMC of a non-phosphate detergent was determined via measurement of surface tension. This method is rapid, reliable and cheap compared to the fluorescence polarization method which required a sopshiscated materials such as 1,6-diphenyl-1,3,5-hexatriene as a fluorescence probe. The detergent formulated with 75% and 50% sodium hydroxide concentrations were found to have CMC values of 8.6685 mM and 6.9348 mM respectively, these values agree well with the literature value ranges between 7 to 10 mM.
Keywords:
Detergent; CMC; Surfactants; Non-phosphate; 1,6-diphenyl-1,3,5-hexatriene
Key words: Detergent; CMC; Surfactants; Non-phosphate; 1,6-diphenyl-1,3,5hexatriene
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