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Partitioning of metals in rotary-kiln incineration

Technical Report ·
OSTI ID:7259608
This research project investigated the fate of trace metals in rotary-kiln incineration with venturi- and packed tower-scrubber particulate- and acid gascontrol. A test plan was developed, using a factorial experimental design, to study the partitioning of metals among kiln ash, scrubber water, flue gas particulate, and flue-gas vapor. Synthetic waste formulations included the hazardous trace elements arsenic, lead, cadmium, chromium, and barium, as well as the non-hazardous trace elements copper, magnesium, bismuth and strontium, spiked into a clay absorbent material. The independent variables chosen for evaluation were chlorine content of the feed, kiln temperature, and afterburner temperature. Cadmium, lead, and bismuth appeared volatile over the range of kiln temperatures tested, while the other six metals displayed refractory properties. Of the three independent variables tested, feed chlorine content had the strongest effect on changes in metal partitioning across the tests; as chlorine content increased, metal volatilization appeared to increase, while scrubber efficiency for metals decreased.
Research Organization:
Environmental Protection Agency, Cincinnati, OH (USA). Risk Reduction Engineering Lab.
OSTI ID:
7259608
Report Number(s):
PB-90-132812/XAB; EPA--600/D-89/208
Country of Publication:
United States
Language:
English