New Approaches to Metal Speciation in Natural Waters Based on Modified and Microvoltammetric Electrodes

Summary report compiled by C.T. Ortega Klett.

The proliferation of heavy-metal contaminants in water has focused attention on their determination and characterization. The challenging research field of metal speciation (or the identification of a metal species) in natural waters, is in its early stages and numerous problems remain. This project resulted in more effective, reliable tools for speciation analysis of natural waters, thus offering a better understanding of the presence, toxicity, and transport of trace metals. Results could be included in future water quality legislation and used for measuring speciation-related water quality parameters.

Specifically, advanced electrode technology was developed to overcome the organicadsorption problem. Overcoming this problem allows for speciation studies in non-saline waters, like much of the water in New Mexico. Results also offered new information on size distribution of metal species, and expanded the technology toward additional trace elements.