Pilot-Scale Pyrolytic Remediation of Crude-Oil-Contaminated Soil in a Continuously-Fed Reactor: Treatment Intensity Trade-Offs
Year: 2019
Type: article
Abstract: Pyrolytic treatment offers the potential for the rapid remediation of contaminated soils. However, soil fertility restoration can be highly variable, underscoring the need to understand how treatment conditions affect soil detoxification and the ability to support plant growth. We report here the first pilot-scale study of pyrolytic remediation of crude-oil-contaminated soil using a continuously fed rotary kiln reactor. Treatment at 420 °C with only 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 (i.e., Lactuca sativa biomass dry weight yield after 21 days increased from 3.0 ± 0.3 mg for contaminated soil to 8.8 ± 1.1 mg for treated soil, which is similar to 9.0 ± 0.7 mg for uncontaminated soil). Viability assays with a human bronchial epithelial cell line showed that pyrolytic treatment effectively achieved detoxification of contaminated soil extracts. As expected, 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. Overall, this study highlights trade-offs between pyrolytic treatment intensity, hydrocarbon removal efficiency, and fertility restoration while informing the design, optimization, and operation of large-scale pyrolytic systems to efficiently remediate crude-oil-contaminated soils.
Language: English
Subfield: Pollution
Field: Environmental Science
Domain: Physical Sciences
Open Access status: green
Funders: Chevron, Shanghai Tongji Gao Tingyao Environmental Science and Technology Development Foundation, National Natural Science Foundation of China, National Institutes of Health, National Heart, Lung, and Blood Institute, National Institute on Drug Abuse, National Institute of Environmental Health Sciences, Government of Shandong Province
Awards: Prenatal exposure to PAHs and hyperoxic lung injury: Role of the microbiome, Role of cytochrome P4501B1 in oxygen-mediated pulmonary injury, Novel in vivo regulatory mechanisms of human CYP3A4, 磁性秸秆吸附剂耦合微生物还原高氯酸盐的行为与机制研究, G383276815, 改性农作物秸秆吸附和厌氧还原联用去除高氯酸盐的效能、行为和机制研究, Molecular mechanisms of cytochrome P4501A regulation by hyperoxia, Molecular mechanism of cytochrome P4501A1 expression., Functional roles of Nrf2 and NQO1 genetic variants in hyperoxic lung injury-ARDS, Mechanistic roles of Cytochrome P4501A enzymes in hyperoxic lung injury, Mechanistic role of P4501 enzymes in the prevention of PAH carcinogenesis by omega 3 fatty acids, G7748928437, Roles of pulmonary and hepatic P4501A enzymes in hyperoxic lung injury in mice, G8145939807, Gulf Coast Center for Precision Environmental Health, POLYCYCLIC AROMATIC HYDROCARBONS: ULTRASENSITIVE DETECTION,EARLY LIFE EXPOSURES-CLINICAL OUTCOMES (PRETERM BIRTHS, CHRONICLUNG DISEASE, AND NEUROCOGNITIVE DEFICITS), PREVENTION ANDREMEDIATION
OpenAlex ID: W2913847778