Effect of salt water on the flocculation of suspended particulate matter in Laguna de Bay

Date

5-1993

Degree

Bachelor of Science in Chemistry

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Nieva T. Librojo-Basilio

Abstract

Levels of cations as Ca2+, Mg2+, Ma+ and e from Manila Bay were determined by Atomic Absorption Spectrophotometry. Concentrations of Cl-, SO4, and CO3 were analyzed using thy standard methods. The predominant cation obtained wa, Mgt' with a mean value of 374 t 2 ma/L followed by Na+, Cal+, and then e with mean values of 272 t 2 ma/L, 130 ± 6 mg/L, and 115 ± 1 mg/L. respectively. The Cl- was observed to dominate the salt water with a mean value of 2947 ± 10 mq/L followed by SO42 and 0032 with mean values of 240 t 1 ma/L and 6 ± 0 mq/L, respectively. Lake water samples were characterized for transparency, chloride concentration and suspended Particulate matter from three different sampling sites in Laguna de Bay mostly from the West Bay. Results showed relatively high values of chloride concentration with a mean. value of 434 ± 8 mq/L which were not significantly different within sites and time. The low values of transparency readings having a mean of 30 ± 8 cm varied significantly with time indicate that the lake is turbid. The suspended particulate matter varied significantly from time to time due to wind-stirring and high surface area: volume ratio of the lake. The % organic matter in suspended particulate matter came primarily from algal bloom and the shallowness of the lake. Different concentrations of salt water corresponding to the theoretical concentrations of salt water,X , 0.5X, and 1.5X salt water concentrations; and different volumes of 100 mL, 50 mL amd 25 mL salt water were added to lake water samples. Higher volume (100 mL) and concentration (1.5 X) of salt water had greater effect on the weight of flocculants. The cation concentrations in the flocculated materials varied significantly with respect to the site, concentrations, and volume of salt water added. Calcium and magnesium, being divalent cations, have great effect on the coagulation of suspended particulate matter.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 993.5 1993 C4 H47

Document Type

Thesis

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