ECOLOGY AND FIELD BIOLOGY LABORATORY
MEASURING THE AMOUNT OF SOLIDS AND AMOUNT OF DISSOLVED OXYGEN USING WATER SAMPLE FROM ESTERO DE BALETE
Ma. Eissa Annette S. Bedural
Sir Luigi Nuñez
Aquatic systems are the different water bodies on earth. They may be classified as either lotic or lentic. Lotic systems are with running or moving waters while lentic systems are still or non-moving waters. The Adamson University’s Estero de Balete is a part of the creek that runs throughout Manila. It is a lotic system. It is located under the Falcon Bridge and is already a landmark in the Adamson Campus. It is between the St. Theresa’s Building and Cardinal Santos Building. It is a creek that is stagnant although it is flowing especially during rainy seasons. Estero de Balete emits a stench due to its being polluted by garbage from around the vicinity. The researcher used a rope and a water bottle to get a sample from the creek. The creek is high tide during the sample gathering. Water pollution is a major problem because water covers 70% of the Earth’s surface and it is a very important resource for people and the environment. It affects drinking water, rivers, lakes and oceans all over the world. In the Philippines, water pollution is a serious problem wherein it threatens the health of the Filipinos. With the rapid increase in population, urbanization, and industrialization reduce the quality of Philippine waters, especially in densely populated areas and regions of industrial and agricultural activities. The discharge of domestic and industrial wastewater and agricultural runoff has caused extensive pollution of the receiving water-bodies. This effluent is in the form of raw sewage, detergents, fertilizer, heavy metals, chemical products, oils, and even solid waste. Each of these pollutants has a different noxious effect that influences human livelihood and translates into economic costs. The country is endowed with rich natural resources, including water, which are essential for the country’s economic development and in meeting its Millennium Development Goals (MDGs). Water resources of the Philippines include inland freshwater (rivers, lakes, and groundwater), and marine (bay, coastal, and oceanic waters). Overall, there is sufficient water but not enough in highly populated areas, especially during dry season.
PROCEDURE AND MATERIALS
Measuring Amount of Solids in Estero de Balete
A. Total Dissolved Solids (TDS)
Materials: Water sample (1000ml)
1. Weigh a piece of filter paper cut to fit the funnel. Then weigh a beaker. 2. Filter the 1000ml of sample through the weighted filter paper. Keep this used filter paper for future use. 3. Place 100ml of the filtered water sample in the beaker. Oven dry and weigh. 4. Continue drying until weigh becomes constant. Make at least 3 readings at 15 minute interval. 5. Record data in the table provided.
6. Compute for the dissolved solids by using the fomula:
Dissolved Solids = (Weigh at 5th reading-Weigh of empty beaker x 10(mg/l or (ppm))
B. Total Suspended Soils TSS (measures the amount of filterable suspended matter in the sample)
filter paper used in B
1. Oven-dry the filter paper used in B at 100 degree Celsius. 2. Continue drying until you obtain a constant weight. Make at least 3 readings with an interval of 15 minutes. 3. Record all data in the table.
4. Compute for the amount of filterable susupended matter by using the formula; Filterable Suspended Solids = Weight at 5th reading-Weight of empty dish (mg/l) or (ppm)
C. Winkler Method
Reagent: Manganese sulfate
Glass flask (200ml)
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