BIODEGRADATION OF MONOAROMATIC HYDROCARBONS IN AQUIFER COLUMNS AMENDED WITH HYDROGEN PEROXIDE AND NITRATE
| Autor: | Timothy M. Vogel, Pedro J. J. Alvarez, Paul J. Anid |
|---|---|
| Přispěvatelé: | University of Michigan [Ann Arbor], University of Michigan System |
| Jazyk: | angličtina |
| Rok vydání: | 1993 |
| Předmět: |
Environmental Engineering
hydrogen peroxide BTEX 010501 environmental sciences 01 natural sciences Ethylbenzene biodegradation 03 medical and health sciences chemistry.chemical_compound benzene Nitrate nitrate Organic chemistry toluene Hydrogen peroxide Benzene Waste Management and Disposal 0105 earth and related environmental sciences Water Science and Technology Civil and Structural Engineering xylenes 0303 health sciences electron acceptor aquifer 030306 microbiology Ecological Modeling Xylene Biodegradation Pollution Toluene 6. Clean water 3. Good health ethylbenzene chemistry Environmental chemistry [SDE]Environmental Sciences indigenous microbes [CHIM.OTHE]Chemical Sciences/Other |
| Zdroj: | Water Research Water Research, IWA Publishing, 1993, 27 (4), pp.685-691. ⟨10.1016/0043-1354(93)90178-K⟩ |
| ISSN: | 0043-1354 |
| DOI: | 10.1016/0043-1354(93)90178-K⟩ |
| Popis: | International audience; The ability of indigenous microorganisms to degrade benzene, toluene, ethylbenzene and xylenes (BTEX) in laboratory scale flow-through aquifer columns was tested separately with hydrogen peroxide (1 l0 rag/l) and nitrate (330 mg/l as NOi') amendments to air-saturated influent nutrient solution. The continuous removal of individual components from all columns relative to the sterile controls provided evidence for biodegradation. In the presence of hydrogen peroxide, the indigeneous microorganisms degraded benzene and toluene (>95%), meta-plus para-xyleue (80%) and ortho-xylene (70%). Nitrate addition resulted in 90% removal of toluene and 25% removal of ortho-xylene. However, benzene, ethylbenzene, meta. and para-xylene concentrations were not significantly reduced after 42 days of operation. Following this experiment, low dissolved oxygen (< 1 mg/l) conditions were initiated with the nitrate-amended column influent in order to mimic contaminated groundwater conditions distal from a nutrient injection well. Toluene continued to be effectively degraded (> 90%), and more than 25% of the benzene, 40% of the ethylbenzene, 50% of the meta-plus para-xylenes and 60% of the ortho-xylene were removed after several months of operation. |
| Databáze: | OpenAIRE |
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