Mercury in US coal: observations using the COALQUAL and ICR data
| Autor: | Jeffrey C. Quick, T. C. Brill, David E. Tabet |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
business.industry
General Engineering Mineralogy chemistry.chemical_element complex mixtures respiratory tract diseases Mercury (element) chemistry Environmental chemistry otorhinolaryngologic diseases Earth and Planetary Sciences (miscellaneous) General Earth and Planetary Sciences Environmental Chemistry Environmental science Coal business General Environmental Science Water Science and Technology |
| Zdroj: | Environmental Geology. 43:247-259 |
| ISSN: | 1432-0495 0943-0105 |
| Popis: | The COALQUAL data set lists the mercury content of samples collected from the in-ground US coal resource, whereas the ICR data set lists the mercury content of samples collected from coal shipments delivered to US electric utilities. After selection and adjustment of records, the COALQUAL data average 0.17 µg Hg/g dry coal or 5.8 kg Hg/PJ, whereas the ICR data average 0.10 µg Hg/g dry coal or 3.5 kg Hg/PJ. Because sample frequency does not correspond to the in-ground or produced tonnage, these values are not accurate estimates of the mercury content of either in-ground or delivered US coal. Commercial US coal contains less mercury than previously estimated, and its mercury content has declined during the 1990s. Selective mining and more extensive coal washing may accelerate the current trend towards lower mercury content in coal burned at US electric utilities. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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