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PILOT-SCALE PYROLYTIC REMEDIATION OF CRUDE-OIL-CONTAMINATED SOIL IN A CONTINUOUSLY-FED REACTOR: TREATMENT INTENSITY TRADE-OFFS
Song, W., J.E. Vidonish, R. Kamath, P. Yu, C. Chu, B. Moorthy, B. Gao, K. Zygourakis, et al.
Environmental Science and Technology 53(4):2045-2053(2019)

A pilot-scale study assessed the effectiveness of pyrolytic remediation of crude-oil-contaminated soil using a continuously fed rotary kiln reactor. Treatment at 420°C with 15 min of residence time resulted in high removal efficiencies for both total petroleum hydrocarbons (TPH) (99.9%) and polycyclic aromatic hydrocarbons (PAHs) (94.5%) and restored fertility to clean soil levels. TPH and PAH removal efficiencies increased with increasing treatment intensity (i.e., higher temperatures and longer residence times). However, higher treatment intensities decreased soil fertility, suggesting that there is an optimal system-specific intensity for fertility restoration.



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