IL 3; Experiment 1
October 31, 1996
The Study of Akali Metal Contamination in Road Side Soil
Abstract
Six soil samples were taken from a roadside that was expected to exhibit characteristic of road salt contamination. This contamination is characterized by the presence of magnesium, calcium and sodium. The relationship between akali metal concentration and distance from the pavement was examined and determined to be nonexistent. Additionally, atomic absorbtion and atomic emission spectroscopy were compared and and atomic absorbtion was found to be 1.89 times as sensitive as atomic emission.
Introduction
A common technique in snow and ice removal on roadways is the application of magnesium, calcium, and sodium chloride salts to the surface of the road. When the ice melts it dissolves these salts and causes them to migrate into soil that is adjacent to the pavement. Over time, the accumulation akali metal salts can change the chemical profile of the soil which can lead to detrimental biological effects.
Sodium Chloride
Sodium chloride crystallization at Badwater Basin
English: Flame photometric assessment of calcium i...Flame atomic spectroscopy provides a technique that can quantify metal concentrations in the extracts of the soil samples and consequently examine the relationship between distance from the point of road salt application and akali metal concentrations.
Experimental
Soil preparation: Six surface soil samples were collected at the intersection of Cold Spring Lane and the exit ramp of Interstate 83, in northwest Baltimore city. These samples were collected at distances from the roadway of 0m, 2m, 4m, 6m, 10m, and 20m. These samples were dried in a convection oven at 110ç for over 24 hours then crushed. Aliquots of approximately one gram were weighed and then extracted with 10.0 mL of 1M ammonium acetate. The extract was filtered with an inline filter disc with a pore size of 5mm and then diluted to 100.0 mL.
Instrumental: The extracts were analyzed for...