Effect of oxidizing gas pressure on laboratory-scale decontamination of soils polluted by hydrocarbons |
| |
| Affiliation: | 1. College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China;2. CQM-Centro de Química da Madeira, Campus da Penteada, Universidade da Madeira, 9000-390 Funchal, Portugal;3. Laboratory of Quality and Safety Risk Assessment for Aquatic Products on Storage and Preservation (Shanghai), Ministry of Agriculture, Shanghai 201306, China;4. Shanghai Engineering Research Center of Aquatic-Product Processing & Preservation, Shanghai 201306, China;1. The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Nankai University, Tianjin, 300071, PR China;2. Cangzhou Institutes for Food and Drug Control, Cangzhou, 061000, PR China;3. Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin’s Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin, 300060, PR China;1. The Affiliated Hospital of Nantong University, Nantong University, Nantong 226001, PR China;2. School of Pharmacy and Jiangsu Province Key Laboratory for Inflammation and Molecular Drug Target, Nantong University, Nantong 226001, PR China;3. State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, PR China;1. Department of Gastroenterology, Sir Run Run Shaw Hospital, Zhejiang University School of medicine, Hangzhou 310016, Zhejiang, China;2. Inflammatory Bowel Disease Center, Sir Run Run Shaw Hospital, Zhejiang University School of medicine, Hangzhou 310016, Zhejiang, China;3. Institute of Gastroenterology, Zhejiang University, Hangzhou 310016, Zhejiang, China |
| |
| Abstract: | Three standard European soils were artificially contaminated with hexachlorobenzene, 4-chlorobiphenyl, and naphthalene. Small piles (ca. 30 mg) of contaminated soil, or neat soil in control runs, were then heated in the crucible of a thermogravimetric analyzer from room temperature to ca. 450°C at 5°C/min. To investigate effects of ambient gas pressure on contaminants removal, soil specimens were subjected to closely similar heating schedules under either 0.1 or 0.01 MPa pressure of air. The lower pressure augmented decontamination, reducing by as much as 20–45°C the temperature necessary for a given extent of pollutant removal, and increasing the maximum rate of decontamination. The precise magnitude and duration of such pressure-induced improvements in decontamination varied with pollutant and soil type. Predictions of a contaminant evaporation-diffusive transport model were in reasonable agreement with experimentally observed pressure trends. Higher diffusion coefficients for pollutant vapor under reduced pressure are believed to be responsible for the observed pressure effects. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
