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A Simulation of the Interaction of Acid Rain with Soil Minerals
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Abstract
The environmental issue of acid rain is incorporated into a five-part laboratory project that employs quantitative analytical laboratory techniques, such as acid–base titrations and gravimetric analysis of aqueous cations. The student observes the effectiveness of soil at consuming excess acidity in rainwater and observes the mobilization of Al3+ and Ca2+ from these interactions. The first four parts of the project involve passing a sulfuric acid solution through a column containing aluminum hydroxide, limestone, montmorillonite clay, or synthetic zeolites (molecular sieves). After its passage through the column, the acid solution is analyzed by titration to determine the resulting acidity and by precipitation of the aqueous Al3+ or Ca2+ with 8-hydroxyquinoline. In the fifth part of the project, an aluminum sulfate solution is passed through a column containing molecular sieves to observe the absorption of Al3+ once it has been mobilized from minerals by acid rain. The five-part project can be treated as an individual student project to be completed during multiple consecutive lab sessions, or divided up as a group or class project that can be completed during one or two lab periods.
Keywords (Audience):
Second-Year UndergraduateKeywords (Domain):
Analytical ChemistryKeywords (Pedagogy):
Hands-On Learning / ManipulativesKeywords (Subject):
AluminumCiting Articles
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This article has been cited by 3 ACS Journal articles (3 most recent appear below).
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Michelle Meighan , Joseph MacNeil and Renee FalconerJournal of Chemical Education2008 85 (2), 254Determining the Solubility Product of Fe(OH)3: An Equilibrium Study with Environmental Significance
Michelle Meighan , Joseph MacNeil and Renee FalconerJournal of Chemical Education2008 85 (2), 254The relationship between pH and the aqueous solubility of heavy metals is explored by considering the environmental impact of acidic mine drainage. Acid mine drainage is an important environmental concern in many areas of the United States. Associated ...
A Pollutant Transformation Laboratory Exercise for Environmental Chemistry: The Reduction of Nitrobenzenes by Anaerobic Solutions of Humic Acid
Frank M. Dunnivant and Mark-Cody ReynoldsJournal of Chemical Education2007 84 (2), 315A Pollutant Transformation Laboratory Exercise for Environmental Chemistry: The Reduction of Nitrobenzenes by Anaerobic Solutions of Humic Acid
Frank M. Dunnivant and Mark-Cody ReynoldsJournal of Chemical Education2007 84 (2), 315This article presents a laboratory exercise for advanced undergraduate- or graduate-level environmental chemistry in which the student studies the chemical transformation (reduction) of substituted nitrobenzenes by natural organic matter under anaerobic ...
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- Received: August 03, 2009
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