Several experiments were conducted in order to test the water quality of a nearby water source, otherwise known as Lake Ripple. Such tests included testing for bare soil, bank erosion, water odor, soil odor, water appearance, benthic macroinvertebrates, coliform bacteria, dissolved oxygen, BOD, nitrates, pH, phosphates, temperature, and turbidity. All of these tests would be used to determine the overall quality of the water of Lake Ripple. There were two testing sites used to determine more accurate results. Samples were taken from water sources on the hill near the school grounds and from the area around the dam.
The average amount of nitrate in the water was approximately zero and nine tenths. The same scenario as the phosphate, the lower the number, the smaller amount of pollution. And the last test I conducted was the dissolved oxygen. The average amount of dissolved oxygen is nine and eight tenths ppm. A certain amount of oxygen is dissolved in bodies of water.
The students used test kits and other tools to test pH, temperature, phosphate, nitrate, turbidity, and dissolved oxygen. The results of the tests were that the Susquehanna River is indeed, very good and healthy. It was discovered that temperature directly corresponds with dissolved oxygen. It was also discovered that there are different types of fish that live in different temperatures. Introduction The problem the students need to solve is whether or not the river is healthy.
In table 1. the pH of 7 has the highest rate of O2 production being 4.41mL/min while the pH with the smallest rate of O2 production being 0.21mL/min is 4. In either direction from the pH7 the average rate is decreasing similar of that to table 2s trend. In table 2. there is a pattern from the temperature of 0.C to 100.C the average change is 2.69mL/min at 0.C then at 23.C it is at its peak being 5.5mL/min but it then decreases again at 4.4mL/min at 37.C. the trend is that in either direction of 23.C the average rate of O2 produced is decreasing. As per table 3. there is a pattern with the enzyme concentration going from 100% to 0%, at 100% the rate of O2 production is at its highest being 7.79mL/min while at 0% the rate of O2 production is at its lowest being 0mL/min.
The bioconcentration factor (BCF) is the concentration of test substance in/on the fish or specified tissues thereof divided by the concentration of the chemical in the surrounding medium at steady state. In the context of setting exposure criteria it is generally understood that the terms “BCF” and “steady-state BCF” are synonymous. A steady-state condition occurs when the organism is exposed for a sufficient length of time that the ratio does not change substantially. Bioconcentration factors (BCFs) are used to relate pollutant residues in aquatic organisms to the pollutant concentration in ambient waters. Many chemical compounds, especially those with a hydrophobic component, partition easily into the lipids and lipid membranes of organisms and bioaccumulate.
Pond Ecosystem Investigation Lab report By: Harshal Buradkar 9 grade Introduction A pond ecosystem consists of abiotic: light intensity of the water, depth of the water, and biotic: fish, plants, bacteria, algae, insects and etc. It also contains water and plants which is the most important part of the pond. Ponds are mostly shallow with the depth of 12-15 feet in which the sun rays can touch the bottom of the pond so that plants can grow. My aim is to find out how the plant cover affect the biodiversity of animal life in the pond. Experimental question How does the plant cover affect the biodiversity of animal life in the pond?
and McKenzie,S.W , 2003). Biochemical Oxygen Demand (BOD) Biochemical oxygen demand represents the environmental procedure to determine the quantity of oxygen consumed by bacteria and other microorganisms while they decompose organic matter under aerobic conditions at a certain temperature over a specific time period. Oxygen demand is a measure of the amount of oxidizable substances in a water sample that can lower DO concentrations (Nemerow, 1974; Tchobanoglous and Schroeder, 1985). The amount of dissolved oxygen in rivers and streams affected by BOD. Temperature, pH, the presence of certain kinds of microorganisms, and the type of organic and inorganic material in the water are the variables that gives effect to the rate of oxygen consumption.
Abstract The unknown concentration of benzoic acid used when titrated with standardized 0.1031M NaOH and the solubility was calculated at two different temperatures (20◦C and 30◦C). With the aid of the Van’t Hoff equation, the enthalpy of solution of benzoic acid at those temperatures was determined as 10.82 KJ. This compares well with the value of 10.27KJ found in the literature. Introduction Solubility is a chemical property that is measured in terms of the maximum amount of solute dissolved in a solvent at equilibrium. The resulting solution is called saturated solution.
Essay 13: How does the brain sense osmolality and regulate water balance? Before answering this question, it is necessary to understand the meaning of the term osmolality as well as its implications for human physiology. In chemistry, the osmolality of a solution is defined as the number of moles of solute (e.g. salt or sugar) per kilogram of solvent. When the solvent in question is water, osmolality is practically the same as the more familiar unit osmolarity, which is defined as moles of solute per liter of solvent.
This lab uses a lake simulation to study how the addition of nutrients and toxins can affect the lake, its inhabitants and the surrounding area. There is a strong focus on the addition of Phosphorous and added toxins because both are key elements in growth in lakes. The Virtual lake includes these five simulated species; green algae, cyanobacteria, bosmina, daphnia, and trout. There are two types of phytoplankton in the lake model, green algae and cyanobacteria. Green algae are a very diverse group that are photosynthetic, aquatic, plant like organisms that have a very simple reproductive structure.
Looking at St. Augustine Inlet utilizing different models Angela Antigua Advanced Research Methods for Engineering Introduction Knowing the hydrology and hydrodynamics of an inlet is very beneficial to know when looking at various things in an ecosystem or establishment. From a biological aspect, the hydrology can affect phytoplankton biomass and composition in an estuary. From a coastal engineering aspect, knowing the hydrodynamics can help us better understand sediment transport. For this study, data from St. Augustine Inlet will be analyzed using various models such as CMS and ADCIRC. The ultimate goal for my thesis is to compare models to see which would suit best when looking at tidal inlets.