Program type:


On Campus
Est. time to complete:

4-5 years
Credit Hours:

72 (with Bachelor's) or 42 (with Master's)
Explore the effects of environmental contaminants on local ecosystems and uncover new methods to mitigate the environmental effects of industrial activity.
Toxicology is the scientific study of the effects of chemicals on organisms; in environmental science, the focus tends to be on the distribution, effect, and fate of chemicals in the environment. The Toxicology concentration helps Ph.D. candidates refine their understanding of the effects of human-created wastes and other toxic chemicals and helps them create research to minimize harm and create thriving ecosystems.

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Why Earn a Toxicology Environmental Science Ph.D.?

The environmental science program is an interdisciplinary collaboration among the Department of Biological Sciences, the Department of Geography, the Department of Chemistry, the Department of Philosophy and Religion Studies and other departments at UNT to examine major environmental issues through an interdisciplinary perspective.

The program offers graduate studies in environmental science that lead to the PhD, granted through the Department of Biological Sciences. The course of study, involving both core and elective courses, is designed for those students who desire an interdisciplinary perspective concerning human-environmental interactions.

Marketable Skills
  • Communication to professional/lay audiences
  • Design field-based research protocols
  • Proficiency in environmental ethics
  • Recognition of national/international issues
  • Lead/direct research programs/projects

Toxicology Environmental Science Ph.D. Highlights

The rigorous curriculum has helped students receive prestigious appointments and awards from organizations including the Entomological Society of America.
The department’s facilities for research and graduate training occur in the Life Sciences Complex; Science Research Building; and the Environmental Education, Science and Technology Building.
The Life Sciences Complex, which has Gold-level Leadership in Energy and Environmental Design certification for sustainability, includes an aquatics laboratory and four climate-controlled rooftop research greenhouses.
Qualified students are supported through competitive teaching assistantships or research assistantships funded by research grants to faculty members. Nine-month stipends and tuition scholarships are available for entering master’s and doctoral students.
Our faculty members include internationally renowned researchers who have earned recognition from the National Science Foundation, the American Association for the Advancement of Science and the American Society for Microbiology, among others.

Toxicology Environmental Science Ph.D. Courses You Could Take

Biochemistry and Molecular Biology of the Gene (3 hrs)
Mechanisms and regulation of genetic expression, chromosome replication, mutagenesis and DNA repair, and gene cloning in prokaryotic and eukaryotic systems.
General Toxicology (3 hrs)
Introduction to the basic principles of toxicology. Focus on absorption, distribution, metabolism and elimination of toxicants; target organ toxicity; mechanisms of toxic action; carcinogenesis; and risk assessment.
Comparative Animal Physiology (3 hrs)
Comparison of structure and physiological function in a wide variety of animals. Emphasis on thermoregulation and on respiratory, circulatory, excretory, endocrine and digestive systems.
Sediment Toxicology (3 hrs)
Mechanisms of contaminant transport and fate in freshwater and marine sediments and pollutant effects at the individual, population and biotic community levels. Sediment contaminant bioavailability and bioaccumulation into food webs and the scientific aspects of legal control and remediation of hazardous sediments.
Ecological Risk Assessment (3 hrs)
Detailed treatment of aquatic and terrestrial methods and procedures used to assess the ecological hazard of chemicals in the environment. Emphasizes quantitative methods in testing site assessment, monitoring procedures, regulatory requirements and field and laboratory techniques useful to assess damage to aquatic, terrestrial and avian resources.
Environmental Chemistry (3 hrs)
Presents a scientific overview of environmental contaminants, their occurrence, sources and impact on humans and the environment.

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