Lab Report 6 Part I PDF

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Lab Reporting. Professor is Dr. Srinivas Prabakar...

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CE 3131-002 Environmental Analysis Laboratory Spring - 2016

Laboratory Report 4 Part – I

Experiment 8: Determine the temperature and dissolved oxygen of a given lake water, tap water and synthetic water.

Submitted by Group C Instructor: Dr. Srinivas Prabakar Group Members: 1. Shannon Hobbs 2. Leopoldo Cardiel 3. Majad Hussein

Due Date: 08-1-2016 Date Submitted: 08-1-2016

Background 1

Dissolved oxygen analysis measures how much oxygen is dissolved into a water source such as rivers, lakes, ponds, and etc. Dissolved oxygen usually gets into the water through the atmosphere or the diffusion from the surrounding air. There are many factors that affect the dissolved oxygen concentration. According to Sheila Murphy on general information on dissolved oxygen, some of these factors include:       

Volume and velocity of water flowing in the water body Climate/Season The type and number of organisms in the water source Altitude Dissolved or suspended solids Amount of nutrients in the water Organic Wastes

These factors or what keep the dissolved oxygen concentration levels high or low. However, what we want are minimal levels of oxygen in a water source. But for good water quality we want high levels of the concentration. According to KY Water Watch, dissolved oxygen concentrations cannot exceed 110 percent as this level of concentration can be dangerous to aquatic life. Aquatic life relies on the oxygen in the water to breathe. The high levels of dissolved oxygen cause aquatic life to suffer from gas bubble disease where the bubbles block the flow of blood through blood vessels resulting in death. The higher the dissolved oxygen concentrations, the higher the stress the aquatic life undergo leader to the gas bubble disease. However, dissolved oxygen is necessary for good water quality in the water sources. In order to maintain water quality without harming aquatic life and keeping their stress levels down, we maintain low levels of dissolved oxygen in the water. All aquatic life has a tolerance to minimal amounts of dissolved oxygen.

Definitions and Significance

Materials and Methods

Appendix: Sample

Electronic Method

Volume Method 2

Room Temp Room Temp with salt < 15 °C > 35 °C

Pressure (mm Hs)

Temp (°C)

DO (mg/L)

747 748 745 741 744 750 742 740

23.24 23.32 23.27 23.28 14.65 15.23 39.28 39.15

7.960 9.230 10.20 10.31 10.17 10.08 9.580 9.790

References: http://www.state.ky.us/nrepc/water/wcpdo.htm http://bcn.boulder.co.us/basin/data/COBWQ/info/DO.html

3

Volume of Na2S2O3 Trial 1 Trial 2 7.5

7.0

7.0

7.0

8.9

9.2

3.6

4.4...