Laser-induced breakdown spectroscopy (LIBS) for elemental analysis of barium and strontium in tree rings as a method of environmental monitoring

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Title	Laser-induced breakdown spectroscopy (LIBS) for elemental analysis of barium and strontium in tree rings as a method of environmental monitoring
Abstract	The present work determines barium and strontium in tree rings using laser induced breakdown spectroscopy (LIBS). A tree sample from Dimock, Pennsylvania adjacent to hydraulic fracturing activity with reported flowback discharge was selected, as well as a control. A spatio-temporal analysis of the rings was performed with LIBS to elucidate pollution history and any trace element enrichment. Intensity ratios show that barium and strontium are indeed present in the contaminated sample and had produced significantly higher signals than the controls, indicating that hydraulic fracturing may have contributed to barium and strontium contamination in water and soil. Barium showed greater signal levels and more fluctuations than strontium. Within the Dimock tree sample, there did not appear to be a strong relationship between elevated contaminant levels and recent rings, suggesting the difficulty of studying environmental archives. Improvements in calibration are necessary for quantitative analysis. Thus, a semi-quantitative approach was developed using LIBS-based tree ring analysis as a means to rapidly detect potential groundwater and soil contamination.
Creator	Bandak, Basel
Degree	Master of Arts in Clinical Chemistry
Department	Chemistry
Advisory Committee	Rusak, David A. Foley, Timothy Baumann, Christopher A.
Geographic Location	Scranton Pennsylvania
Publisher	The University of Scranton
Place of Publication	Scranton Pennsylvania
Date Created	2011-09-09
Academic Year	2011-2012
Decade	2010-2019
Type	Text
Language	eng
Rights	The author of this work retains the copyright. The author has granted to The University of Scranton a non-exclusive license to preserve and make the thesis available in the Electronic Theses Archives, with access open to the public. The author's signed Electronic Thesis Approval Form is on file in the Weinberg Memorial Library Digital Services Department.
Subject Keywords	Thesis Masters Chemistry Spectroscopy Tree rings Environmental Science
LCSH	University of Scranton -- dissertations Laser-induced breakdown spectroscopy Contaminated forests Dissertations, Academic
Source	Digital submission
Provenance	Submitted digitally by the author
Collection	University of Scranton Masters Theses
Format	application/pdf
Access Rights	Public
Host	The University of Scranton Weinberg Memorial Library

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Laser-induced breakdown spectroscopy (LIBS) for elemental analysis of barium and strontium in tree rings as a method of environmental monitoring

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