This website uses cookies to ensure you have the best experience. Learn more

Eutrophication Essay

1913 words - 8 pages


The Effects of Nitrogen and Phosphorus Enrichment on Water Samples from Encanto Lake and the Rio Salado River.

Phoenix College


The purpose of this is experiment is to more closely understand the effects of nutrient enrichment on samples of water from Encanto Park Lake and the Rio Salado River. More specifically the concentration of nitrogen, phosphorus, and nitrogen and phosphorus together were altered and the effects this had upon algal growth were then observed. The results indicated that an ...view middle of the document...

That is not to say we should give up. I believe the point Nixon is making is that our ecosystem is in a constant state of flux. If research is conducted based on attempting return to nitrogen and phosphorous concentrations to levels that were exhibited in the past, the research will only fail. The research into the causes and methods of correction must still occur, but realistic goal points should be set. Taking that into consideration, the best way to combat something like eutrophication is to first understand its causation. It is important to conduct research into the causes of eutrophication, is it higher concentrations of nitrogen that cause it, phosphorous, or a combination of both. In the following experiment I will look at the potential causes (nitrogen and phosphorous) of eutrophication in fresh water samples from two different sources. Does the degree of concentration of nitrogen and phosphorus added to fresh water samples from the Encanto Park Lake and Rio Salado River directly affect the rate of algal growth?

Materials and Methods
The samples of unfiltered Rio Salado River water used in these experiments were collected from a site on the south bank of the river near S. 7th Ave. in Phoenix Arizona (see figure 1). The samples of water were collected by filling a three-gallon carboy by submerging it in the river. The carboy was then transported at ambient air temperature to the lab the same day it was used in the following procedures.

fig. 1 Rio Salado River with star indicating collection site


The samples of unfiltered Encanto Park Lake water used in these experiments were collected from a site on the western shore of the lake near N. 15th Ave. in Phoenix Arizona (see figure 2). The samples of water were collected by filling a three-gallon carboy by submerging it in the river. The carboy was then transported at ambient air temperature to the lab the same day it was used in the following procedures.

fig. 2 Encanto Park Lake with star indicating collection site

A [2000mg/L] stock solution of N (nitrogen) was prepared by combining 0.2g of NH4NO3 (Ammonium Nitrate) with 100mL of RO (reverse osmosis) water and mixing by swirling until completely dissolved in a 125mL flask. A second N stock solution was created by adding 1mL of N stock solution #1 to 9mL of RO water creating a [200mg/L] N stock solution #2.
A [2000mg/L] stock solution of P (phosphorus) was prepared by combining 0.2g of NaH2PO4 (Sodium Phosphate) with 100mL of RO water and mixing by swirling until completely dissolved in a 125mL flask. A second P stock solution was created by adding 1mL of P stock solution #1 to 9mL of RO water creating a [200mg/L] P stock solution #2.
A stock solution of N + P was prepared by combining 0.2g of NaH2PO4 and 0.2g NH4NO3 with 100mL of RO water and mixing by swirling until completely dissolved in a 125mL flask. A second N + P...

Other Papers Like Eutrophication

Chesapeake Bay Essay

720 words - 3 pages the nutrients are known to originate from a specific location. However in a non-point source nutrient loading the nutrient’s origin is not easily identified, which makes this kind of nutrient loading difficult to contain. 4. The greatest contributor of nutrient loading in the bay is agricultural run-offs. 5. Eutrophication is the enrichment of the ecosystem with chemical substances such as nitrogen and/or phosphorous. It can also be

Geography Glossary Essay

616 words - 3 pages flow of water. Gulley- A gully is a landform created by running water eroding sharply into soil, typically on a hillside. Onion-skin weathering- Exfoliation joints are surface-parallel fracture systems in rock often leading to erosion of layers of rock. Eutrophication- excessive nutrients in a lake or other body of water, usually caused by runoff of nutrients (animal waste, fertilizers, sewage) from the land, which causes a dense growth of

A Domestic Problem

586 words - 3 pages life on Earth. Water pollution is the contamination of water bodies and any change in water quality that negatively affects any living organism. Water pollution is usually caused by human activities such as the removal of sewage, industrial wastes, and agricultural chemicals. Water pollution is also caused by atmospheric deposition, eutrophication, radioactive waste, and global warming. It affects plants and organisms living in these

Environmental Impact of Raising Animals for Food

576 words - 3 pages tanneries (Livestock’s Long Shadow 2006). Contributing to eutrophication, “dead” zones in coastal areas, human health problems, degradation of coral reefs, emergence of antibiotic resistance and others, the livestock sector is considered to be the largest sectorial sources of water pollution.

Drinking Water: Taste And Odor

3574 words - 15 pages wastewater are changing every year, so that more materials that cannot be gotten rid of are being added to wastewater and, ultimately, to water in general. If the amount of these substances goes on increasing, they will accumulate in the food chain.  Consequence: Wastewater management, if not managed effectively, is going to eventually affect all kinds of life form. Eutrophication (discussed below) is a grave consequence of inefficient and / or

Adrenal Gland

3185 words - 13 pages 1.1 Pesticides  1.1.1 Pesticide leaching o 1.2 Fertilizers  1.2.1 Leaching, runoff, and eutrophication  1.2.2 Organic contaminants o 1.3 Heavy metals o 1.4 Land management  1.4.1 Tillage and nitrous oxide emissions  1.4.2 Soil erosion and sedimentation • 2 Biotic sources o 2.1 Greenhouse gases from fecal waste o 2.2 Biopesticides o 2.3 Introduced species  2.3.1 Invasive species  2.3.2 Biological control

Chem Analysis

3081 words - 13 pages phosphorus is the eutrophication of surface water. This is where the uncontrollable growth of algae occurs. Waterways should not exceed a concentration of phosphorus greater than 0.05mg/L. Increased levels of phosphates in water are attributed by fertilisers and sewage due to human factors will cause the water surface to glow green or red, depending on the type of algae. The most importantly consequence of this is that algae depletes the amount of

Freshwater Ecosystem

1721 words - 7 pages , fundamental nutrient cycles are altered in ways that completely change the biology and chemistry of a system. In extreme cases this can lead to eutrophication (when high nutrient loads stimulate blooms of algae in the water, in turn stimulating microbial activity) (Botkin & Keller, 2011). Oxygen is depleted and massive amounts of organisms may begin to die off as a result. This is why all construction projects should have a sustainable scope and

The Indian Pharmaceutical Industry

826 words - 4 pages formation of N-nitrosamines, a possible carcinogen in stomach another issue of ecological concern is causing of algal blooms or eutrophication in water bodies (Chih-Hsiang Liao et al., 2003). The pharmaceutical effluents were treated by traditional techniques such as flocculation, coagulation, conventional biological treatment, filtration, reverse osmosis, precipitation ,incineration, and triple effect evaporator because of high TDS. In these


698 words - 3 pages high energy needed to break the triple bond. A broad term that includes any forms of acids that accumulate in the atmosphere, for instance, acid rain, fog, haze. The primary causes of acid rain are pollutants like sulfur dioxide and nitrogen oxides. Eutrophication is the leaching of pollutants from the soil into the ground water, ponds, lakes and rivers. Result of the use of chemical fertilizers or pesticides on farmers' fields. The

Heavy Metals Pollution in Water

840 words - 4 pages concentrations these wastes result in bacterial contamination and excessive nutrient loading (eutrophication). Inorganic industrial wastes are much tricker to control and potentially more hazardous Industries discharge a variety of toxic compounds and heavy metals, and wastewater from industrial process may also be too hot or too low in dissolved oxygen to support life. First of all, we want to mention about the heavy metal sources which cause to

Related Essays

Fertilizers And Pesticides Essay

1040 words - 5 pages note leas its eutrophication, “eutrophication is the enrichment of bodies of fresh water by inorganic plant nutrients (e.g. nitrate, phosphate). It may occur naturally but can also be the result of human activity (cultural eutrophication from fertilizer runoff and sewage discharge) and is particularly evident in slow-moving rivers and shallow lakes … Increased sediment deposition can eventually raise the level of the lake or river bed, allowing

Air And Water Essay

1059 words - 5 pages produce a number of adversary effects on ones respiratory system. This air pollutant can also cause a wide array of environmental damage because it helps form acid rain. Nitrogen oxide can also cause eutrophication and visibility impairment (Berg & Hager, 2007). A secondary air pollutant not directly emitted from a source, but instead is cause by the reaction of primary pollutants with the environment is ozone. Ozone is a gas that is comprised

Overpopulation Essay

871 words - 4 pages usual manner. The sewage plants do their best, but the secondary discharge that gets into the water supply causes great problems. The excess waste acts as a food source for algae and the growth rate is uncontrollable. Everyone has been in a lake where there is a lot of dead algae on the shore and the water is clouded with algae. This situation is known as eutrophication, where algae growth is out of control and the water becomes oxygen depleted

Environmental History Essay

2821 words - 12 pages years to flush & change water in lakes & reservoirs. 2. Lakes & reservoirs are much more vulnerable to runoff contamination of all kinds of materials. 4. Chemical concentrations build up as they pass through the food webs in lakes. B. Human activities can overload lakes with plant nutrients that reduce dissolved oxygen & kill some aquatic species. 1. Natural nutrient enrichment of lakes from runoff is called eutrophication