Water Preparation Lab Report

The different methods for checking the physical, chemical as well as biological parameter of given water sample are explained as below:

1. Temperature : Temperature is checked by the thermometer.

2. pH : We can check pH of given water sample through pH testing machine.

3. Dissolved oxygen : The term Dissolved oxygen is used to describe the amount of oxygen dissolved in a unit volume of water. It measures the ability of water to support the aquatic organisms. Its procedure has following steps :

I. Take a water sample about 300ml in a conical flask.

II. Add 2ml magnous sulphate well below the surface of water by means of pipette followed by 2ml sodium azide solution in the same manner.

III. Mix well and precipitations start appear. Leave for

Add 2ml starch solution and blue colour appear in the solution.

VI. Titrate it against EDTA (in the burette) until blue colour first disappear.

VII. Note the ml of EDTA used.

4. Biochemical oxygen demand: It is a chemical method to determine the amount of dissolved oxygen the aerobic organisms used in the water sample to disintegrate or break the organic substances present in the given water sample at a certain temperature over a five-day period. Its procedure is same as that to determine the dissolved oxygen but the reading are taken after five days.

5. Hardness : The purpose of this experiment is to determine the total hardness of water sample which is the sum of calcium and magnesium ion concentration, both expressed as calcium carbonate in mg/L. Following steps are followed to proceed the experiment:

I. Add 200ml water sample in a conical flask.

II. Add 2ml ammonium buffer followed by few drops of EBT indicator.

III. Titrate with EDTA(in the burette) until the colour changes from wine red to blue.

IV. Note the ml of EDTA solution

Lift the comparator towards upward so that a plenty of day lght can enter into the cells and also to water present in the cell.

V. If the dissolved DPD tablet give a pink colour to the water, this ensures the presence of chlorine in the water sample.

VI. Compare the colour on the colour scale and match it to the nearest colour and then read the amount of chlorine present in the water sample from the scale.

VII. After the completion of test, remove the cap of the comparator and discard the water into the soil.

8. Biological test : This test is performed to check the presence of living organisms in the water body such as algae, bacteria, plankton etc. This is done with the help of microscope.

EXPECTED OUTCOMES

This research project expects to have the following outcomes by the end of the project:-

1. Measurement of the different contaminants in the fresh water.

2. Analysis of mechanisms required for the analysis of physical, chemical as well as biological contaminants.

3. To analyse that whether the water is able to drink and to be used for other purposes.

4. Analysis of causes and consequences of existing contaminants in the water so that we can remove them for its utilization.

5. Publication of report of the research