Towards a method for the partial extraction of metals in soils
LE3 .A278 2017
Bachelor of Science
Partial extraction geochemical methods have been proposed as a technique for determining buried mineral deposits at depth. A series of partial extractions were performed on a soil sample from the Acadia Woodland Trail using dilute acid and base solutions, as well as a deionized water control as partial extracting reagents. A batch matrix partial extraction was conducted at four different water-to-soil ratios to determine the optimum extraction conditions. Total dissolved metal concentrations in the extract solutions were measured using inductively-coupled plasma mass spectrometry (ICP-MS). A standard phenanthroline method was used to determine the amount of dissolved ferrous iron. The batch matrix partial extractions yielded similar results for the trace and major elements. A significant increase in concentration was observed for pH below 5 and above 8.8. A minimum in the measurement of dissolved trace and major concentrations occurs within the pH range of 5.5-7.5, depending on the element of interest. The batch matrix partial extractions for oxyanions showed a significant increase in the dissolved metal concentration at high pH, round 7.5 or 8
The author grants permission to the University Librarian at Acadia University to reproduce, loan or distribute copies of my thesis in microform, paper or electronic formats on a non-profit basis. The author retains the copyright of the thesis.