Theses and Dissertations - UTB/UTPA
Date of Award
12-2010
Document Type
Thesis
Degree Name
Master of Science (MS)
Department
Chemistry
First Advisor
Dr. Elamin E. Ibrahim
Second Advisor
Dr. Kenneth R. Summy
Third Advisor
Dr. Jason Parsons
Abstract
Studies were conducted to investigate the use of spectral reflectance by foliage of common sunflower as a potential indicator of arsenic contamination of soil. Germination method was developed for sunflower seeds, and cohorts of sunflower seedlings in hydroponic tanks were established. The cohorts were exposed to 0 ppm, 5 ppm, 7.5 ppm, and 10 ppm treatments of As (V) and reflectance measurements of foliage were collected using a spectroradiometer during two experiments.Results demonstrated the feasibility of using spectral reflectance by foliage of common sunflower as a potential indicator of arsenic contamination. In both experiments, arsenic concentrations in leaf tissues were directly proportional to arsenic concentrations in hydroponic solutions in which such plants were grown. Although the effect(s) of arsenic accumulation had minimal impact on reflectance of visible wavelengths, the effects on NIR reflectance were substantial and resulted in a progressive decrease in reflectance as arsenic concentrations in foliage increased.
Granting Institution
University of Texas-Pan American
Comments
Copyright 2010 Yuridia Patricia Peralta de Gandy. All Rights Reserved.
https://www.proquest.com/dissertations-theses/spectral-reflectance-as-indicator-foliar/docview/853095048/se-2?accountid=7119