Title

Microbially controlled selenate reduction in nutrient limited systems.

Date of Award

2005

Degree Type

Thesis

Degree Name

M.Sc.

Department

Geology

Keywords

Geochemistry.

Rights

CC BY-NC-ND 4.0

Abstract

The global cycling of toxic metals is of great concern to people world wide. Understanding the factors, biotic and abiotic, controlling metal mobility and persistence in natural aquatic environments has been the topics of many studies in recent decades. One of the toxic metals whose mobility and toxicity is of great concern is selenium. Selenium poisoning in fish and aquatic birds can cause terratogenic mutations and increased mortality in contaminated systems. Selenium mobility, and therefore bioavailability is dominated by its oxidation state. The selenium oxyanions selenate and selenite are far more mobile than elemental selenium. Elemental selenium precipitates and binds out of aquatic systems. As such, the goal of many modern remediation strategies has been to reduce selenate and selenite to elemental selenium. Bacteria have been explored as potential natural remediators of selenium and other toxic ions in natural systems. (Abstract shortened by UMI.) Paper copy at Leddy Library: Theses & Major Papers - Basement, West Bldg. / Call Number: Thesis2005 .K43. Source: Masters Abstracts International, Volume: 44-03, page: 1307. Thesis (M.Sc.)--University of Windsor (Canada), 2005.