Levels of Methylene Blue Active Substances (MBAS), total hardness and coliform count values of groundwater sources in San Antonio, Los Baños, Laguna

Date

10-2000

Degree

Bachelor of Science in Agricultural Chemistry

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Nieva T. Librojo-Basilio

Co-adviser

Maxima E. Flavier

Committee Member

Ruby A. Ynalvez

Abstract

Values of methylene blue active substances (MBAS), total hardness and conform count of nine groundwater sources were determined in San Antonio. Los Banos, Laguna the MBAS levels ranged from 0.064 mg/L (site 8) to 0.096 mg/l. (site 2) while total hardness ranged from 133.87 mg/l. (site 6) to 204.82 mg/I. (site 7). Both the value ranges for the surfactant level and total hardness fell below the maximum allowable limit for drinking water at 0 2 mg/. and 200 mg./I., respectively. Results from the most probable number method (MPN) of conform determination showed the absence of Escherichia coli in all water samples. The presumptive tests have MIPN count ranging from less than 1 MPN/100 mL (site 4 and site 7) to 180+ MPN/I00 mL site 2 and site 9). The confirmatory tests, on the other hand. have MPN count of less than 1 MPN 100 ml. in all sites. The Analysis of Variance (ANOVA) of surfactant level by MBAS method showed that the age of wells, depth of wells, interaction between the age and depth of wells have no significant effect on the surfactant concentration. However, time of collection, interaction between time and age of wells, and the interaction of depth of wells and time of collection have significant effects on the surfactant concentration. The average surfactant concentration as MBAS for the month of September, 2000 was significantly higher than July and August of the same year at 5% level by Duncan's Multiple Range Test (DMRT), while the average surfactant concentration were not significantly different for water samples taken from wells at all depths. Also, the average surfactant concentrations as MBAS were not significantly different in relation to the age of wells at 5% level of DMRT The average hardness of water for all three months of sampling was not significantly different at 5% level by DMRT. The hardest water was from wells of 60 and 80 feet deep. the hardness was significantly higher than water from wells of 40 and 120 feet deep at live percent (5°a) level by DMRT

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 993.5 2000 A13 J38

Document Type

Thesis

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