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Research Focus
The influence of humic acid on arsenic adsorption and speciation
Description of
Research
Arsenic is a widely occurring element. Naturally, arsenic is released by the earth’s crust and volcanoes. Human sources of arsenic include pesticides, mining, and the burning of fossil fuels. Arsenic is a known carcinogen and also causes the decay of body tissues, leaving behind open lesions. Perhaps even more troubling is that arsenic is virtually undetectable to humans once dissolved in water.
Humic substances are formed by the decay of plant, animal, and microbial matter, and are the major source of natural organic matter in both soil and water. Humic acids are the fraction of humic substances that dissolve in base, but not acid. Research has shown that under certain conditions, arsenic can bind to humic acid, rendering it less mobile in the surrounding environment.
Currently, most humic acids used for research are obtained by commercial chemical supply companies. I am working with humic acids extracted from sediments collected from natural aqueous systems, thus producing results that are relevant to the environment.
Example of How My
Research is Integrated into My GK-12 Experience
My experience within the classroom has allowed me to implement lessons that are based on my research and my overall area of specialty. As an environmental scientist, I hope to educate students about the importance of environmental protection and conservation at both the local and global levels. My first lesson plan involved a water filtration activity in which students designed and tested the effectiveness of their water filter. This activity related to the importance of water conservation in the students’ community and educated students on the early stages of wastewater treatment.
Profile date:
February 21, 2009
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