Biodegradation study on coconut fatty alcohol sulfate (A 24-hour experiment of combined continuous flow and static water scheme)

Date

10-2002

Degree

Bachelor of Science in Chemistry

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Nieva T. Librojo-Basilio

Abstract

Tanyag, Leslee May Maralit, College of Arts and Sciences, University of the Philippines Los Banos, October 2002. Biodegradation Study on Coconut Fatty Alcohol Sulfate (A 24-Hour Experiment of Combined Continuous Flow and Static Water Scheme).

Adviser: Dr. Nieva T. Librojo-Basilio

The biodegradability of impure Coconut Fatty Alcohol Sulfate or CFAS (76.7% purity) in aged tap water was studied by determining the CFAS concentration during 24-hour incubation in an experimental set-up consisting of continuous flow and batch (static) sequential stages.

Methylene Blue Active Substance (MBAS) analysis was used to determine the surfactant concentration in each water sample with CFAS test concentrations of 0, 2 and 4 ppm. Four water quality parameters such as pH, temperature, Dissolved Oxygen (DO) and Total Dissolved Solids (TDS) were monitored during the analysis.

Deviations in CFAS concentration were not significant from 0 to 12 hours due to the continuous addition of fresh test surfactant solutions. From 12 to 18 hours of incubation, significant decrease of CFAS concentration was observed. In batch water stage, it was found that surfactant concentration dropped to almost zero.

Mean values for pH ranged from 6.50 to 7.13, temperature readings ranged from 27.13 to 30.23°C, while DO values were 2.77 to 6.60 ppm and average TDS ranged from 272 to 287 ppm. The first three parameters showed significant variations with respect to the time of measurement and CFAS test concentrations. Mean pH readings varied according to the type of water scheme; the values decreased for 18 hours then increased for the remaining hours. Average temperature values were significantly dependent on the temperature of the sampling area with respect to the time of measurement. Degradation of the surfactant can decrease the DO content of water samples. Obtained TDS readings did not show significant variation in relation to the time of measurement and nominal surfactant concentration but generally described the increased effect of CFAS on the TDS.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

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