Evaluation of bromate levels and some water quality parameters of UPLB drinking water sources

Date

4-2007

Degree

Bachelor of Science in Chemistry

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Maxima E. Flavier

Abstract

SUNGA, CHRISTOPHER TRISTAN GUECO, College of Arts and Sciences, University of the Philippines of Los Banos. April 2007. EVALUATION OF THE BROMATE LEVELS AND SOME WATER QUALITY PARAMETERS OF UPLB DRINKING WATER SOURCES.

Adviser: Dr. Maxima E. Flavier

The UPLB Drinking water system undergoes chlorination at the pump houses to eliminate disease-causing microorganisms such as E. coli. This study collected water samples from five deep wells are the main sources of water distributed in four pump houses.

Disinfection of the water distribution at UPLB are done at the pump houses and delivered to all units of UPLB. Chlorination using calcium hypochlorite eliminates disease-related bacteria. However, disinfection by-products such as trihalomethanes, haloacetic acids and bromates are produced which are reported to be hazardous to human health. This study is the first investigation on the occurrence of disinfection by-products in drinking water at UPLB.

Results showed that bromate concentration range is from 56.5 to 123.9 1.1.g/L for all water samples. The maximum allowable limit set by PNSDW is 25 pg/L. Statistical analysis using ANOVA at 5% level of significance showed there is variability on the concentrations with respect to sampling time.

The range of values obtained for the different water quality parameters are as follows: pH: 6.28-7.75; turbidity: 0 NTU; temperature: 24-38°C; total suspended solids: 1.5-9mg/L; total dissolved solids: 326-728 mg/L; residual chlorine: 0.1-0.3 mg/L; nitrate-nitrogen: 0.36-1.64 mg/L; total hardness: 162-324 mg/L. Total suspended solids and nitrate-nitrogen values are comparably lower than previous studies by Soriano (2006) and Mercado (2007).

Statistical analysis using ANOVA at 5% level of significance to determine variances between sampling sites and sampling time for each physico-chemical parameter. ANOVA results showed that pH, temperature and nitrate-nitrogen vary significantly with respect to sampling site. The values obtained in each sampling site differ with at least one of the other sampling sites. ANOVA also showed that, bromates, TDS, and hardness vary significantly with respect to time. The parameters showed variability respect to time.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

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