Oxygen Levels At 24 ?? C

1055 WordsAug 28, 20145 Pages
The results display that the dissolved oxygen levels at 4°C were greater in comparison to the levels at 24°C and 60°C. This can be seen in figure 7 where the graph shows the dissolved oxygen (measured by a DO meter) decreasing as the temperature increases. Similarly, as seen in figure 8, the O2 calculations in mg/L decreased as the temperature increased. Overall, for 4°C the O2 calculations in mg/L were significantly lower in comparison to the dissolved oxygen meter results whereas for 24°C, the results were fairly similar. For 60°C the O2 calculations in mg/L were greater in comparison to the dissolved oxygen meter results. This is evident in figure 8 where the concentrations of O2 for 4°C, 24°C and 60°C were 8.62 mg/L, 8.5 mg/L and 4.52 mg/L and the dissolved oxygen meter results were 21.8ppm, 7.3ppm and 2.5ppm. Even though the O2 calculations in mg/L and dissolved oxygen measured by a DO meter varied, they both had similar trends. Interpretation: Australian water authorities such as SEQ Water, employ numerous chemical engineers, environmental scientists and analytical chemists to maintain the quality of water in our waterways such as the Brisbane river. This ensures that water is safe for use by humans and organisms within the natural ecosystem. The results gained from this investigation indicate that there is a relationship between the solubility of oxygen and temperature in the Brisbane river water. Therefore, the hypothesis was partially supported. The data obtained

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