Eutrophication Essay example

1911 Words Mar 6th, 2015 8 Pages
Running head: EFFECTS OF N AND P ENRINCHMENT ON WATER SAMPLES 1

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

Phoenix College

EFFECTS OF N AND P ENRINCHMENT ON WATER SAMPLES 2

Abstract
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 increase in nitrogen concentration showed minimal
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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 stock solution was created by

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