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- Title
Volatility of Arsenic in Contaminated Clay at High Temperatures.
- Authors
Gray, Deborah B.; Watts, Frank; Overcamp, Thomas J.
- Abstract
Experiments were conducted in a tube furnace on the volatility of arsenic from contaminated kaolin clay. The experimental temperatures ranged from 522 to 1125°C. The gas compositions used were nitrogen, oxygen and nitrogen, carbon monoxide and nitrogen, and hydrogen chloride and nitrogen. At 522°C, 10 to 22% or less of the arsenic volatilized in all experiments. At 1125°C under inert and oxidizing atmospheres, about 40% of the arsenic volatilized. Arsenic volatility was higher for the reducing and the hydrogen chloride-containing atmospheres. At 950°C and residence times of 1 h or longer, 80% or more of the arsenic was lost for both the reducing and the hydrogen-chloride containing atmospheres. At 1125°C, arsenic volatilization ranged from 82 to 92% for the reducing atmosphere and 91 to 98% for the hydrogen chloride-containing atmosphere. The low arsenic volatility in the oxidizing experiments is similar to results in pilot- and full-scale incinerator tests.
- Publication
Environmental Engineering Science, 2001, Vol 18, Issue 1, p1
- ISSN
1092-8758
- Publication type
Article
- DOI
10.1089/109287500750070216