Zinc isotopic composition of particulate matter generated during the combustion of coal and coal + tire-derived fuels
Environmental Science & Technology
By: D.M. Borrok, R. Gieré, M. Ren, and E. R. Landa
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Abstract
Atmospheric Zn emissions from the burning of coal and tire-derived fuel (TDF) for power generation can be considerable. In an effort to lay the foundation for tracking these contributions, we evaluated the Zn isotopes of coal, a mixture of 95 wt % coal + 5 wt % TDF, and the particulate matter (PM) derived from their combustion in a power-generating plant. The average Zn concentrations and δ(66)Zn were 36 mg/kg and 183 mg/kg and +0.24‰ and +0.13‰ for the coal and coal + TDF, respectively. The δ(66)Zn of the PM sequestered in the cyclone-type mechanical separator was the lightest measured, -0.48‰ for coal and -0.81‰ for coal+TDF. The δ(66)Zn of the PM from the electrostatic precipitator showed a slight enrichment in the heavier Zn isotopes relative to the starting material. PM collected from the stack had the heaviest δ(66)Zn in the system, +0.63‰ and +0.50‰ for the coal and coal + TDF, respectively. Initial fractionation during the generation of a Zn-rich vapor is followed by temperature-dependent fractionation as Zn condenses onto the PM. The isotopic changes of the two fuel types are similar, suggesting that their inherent chemical differences have only a secondary impact on the isotopic fractionation process.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Zinc isotopic composition of particulate matter generated during the combustion of coal and coal + tire-derived fuels |
| Series title | Environmental Science & Technology |
| DOI | 10.1021/es102439g |
| Volume | 44 |
| Issue | 23 |
| Year Published | 2010 |
| Language | English |
| Publisher | ACS Publications |
| Publisher location | Washington, D.C. |
| Contributing office(s) | Toxic Substances Hydrology Program, University of Texas at El Paso |
| Description | 6 p. |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Environmental Science and Technology |
| First page | 9219 |
| Last page | 9224 |
| Country | United States |
| Google Analytic Metrics | Metrics page |