Alternative Management Methods for Acid Deposition in Lakes
Fri, 04/26/2013 - 18:09
Abstract: Acid deposition has been causing the acidification of lakes in the Northeast United States for decades. The result is lake ecosystems with abnormally low pH that stresses the organisms that live there. Management plans in place in the Adirondack Park have been working to remediate acidified lakes for the past few decades. Limestone (CaCO3) has been the generally accepted method for managing these lakes, in an attempt restore the lakes pre-impacted conditions. The purpose of this study was to evaluate the effectiveness of liming in reversing the effects of acidification, and to identify effective alternatives. Five alternatives were tested against limestone: Sodium carbonate (Na2CO3), Sodium bicarbonate (NaHCO3), Sodium acetate (CH3COONa), Magnesium carbonate (MgCO3), and Potassium carbonate (K2CO3). Double End-Point Titration tests were performed on all of the compounds, using both distilled water and lake water, to determine the relative alkalinity of each compound. Alkalinity is the measure of the ability of a solution to neutralize acid, also known as its "buffering capacity." Lake water was used in the titration tests in an attempt to mimic in-situ testing. The results of the titrations showed limestone proving to be the most effective in the lake water tests, with Magnesium carbonate and Potassium carbonate ranked closely behind. While limestone has proven to be an effective management method, its reliability is dependent upon the characteristics of the lake catchment, making it important to continue to look for alternative solutions.
Literary Rights: Off
Major: Environmental Sciences
File Attachments: AcidDeposition_Capstone.pptx
Impact of Wellness Policies on Public School A La Carte Food Sales
Mon, 04/22/2013 - 20:00
Abstract: While nutrition and wellness standards in schools have been a topic of concern for many nutrition experts, schools are sometimes reluctant to modify foods sold to meet healthier standards in fear it will negatively impact sales. The purpose of this quantitative, comparative study was to analyze the impact of varying types of wellness policies in Upstate New York public schools on a la carte food sales. Data was collected in the form of daily sales reports provided by school food service managers from schools with varying types of wellness policies in several Upstate New York public high schools and were compared to see the differences, similarities, and other notable patterns in sales of items sold. This will help schools in the process of producing wellness plans predict which a la carte sales will be most beneficial, as well as understand the implications of the USDA’s recently proposed guideline for school foods. This study will benefit school food services from a sales perspective while maintaining the effort to provide today’s youth with healthy options in schools.
Literary Rights: Off
Major: Food Service and Beverage Management
File Attachments: Capstone.docx