Bioaugmented remediation of high concentration BTEX-contaminated groundwater by permeable reactive barrier with immobilized bead
| Autor: | Bao Ping Xin, Chih-Hung Wu, Cheng-Han Wu, Chi Wen Lin |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
DNA
Bacterial Bioaugmentation Environmental Engineering Alginates Environmental remediation Health Toxicology and Mutagenesis BTEX Ethylbenzene Mycobacterium Biostimulation chemistry.chemical_compound Bioremediation Glucuronic Acid Pseudomonas Benzene Derivatives Environmental Chemistry Groundwater Waste Management and Disposal Chemistry Hexuronic Acids Xylene Environmental engineering Pollution Oxygen Biodegradation Environmental Permeable reactive barrier Polyvinyl Alcohol Environmental chemistry Water Pollutants Chemical |
| Zdroj: | Journal of Hazardous Materials. :765-772 |
| ISSN: | 0304-3894 |
| DOI: | 10.1016/j.jhazmat.2012.11.007 |
| Popis: | Ineffective biostimulation requires immediate development of new technologies for remediation of high concentration BTEX-contaminated (benzene, toluene, ethylbenzene and xylene) groundwater. In this study, bioaugmentation with Mycobacterium sp. CHXY119 and Pseudomonas sp. YATO411 immobilized bead was used to remediate BTEX-contaminated groundwater with about 100 mg l −1 in total concentration. The batch test results showed that the CHXY119 and YATO411 immobilized bead completely biodegraded each BTEX compound, and the maximum biodegradation rates were 0.790 mg l −1 h −1 for benzene, 1.113 mg l −1 h −1 for toluene, 0.992 mg l −1 h −1 for ethylbenzene and 0.231 mg l −1 h −1 for p -xylene. The actual mineralization rates were 10.8% for benzene, 10.5% for toluene, 5.8% for ethylbenzene and 11.4% for p -xylene, which indicated that the bioremediation of BTEX by the immobilized bead requires a rather small oxygen supply. Degradation rates achieved by the bioaugmented permeable reactive barrier (Bio-PRB) system of the immobilized bead were 97.8% for benzene, 94.2% for toluene, 84.7% for ethylbenzene and 87.4% for p -xylene; and the toxicity of the groundwater fell by 91.2% after bioremediation by the bioaugmented PRB, which confirmed its great potential for remediating groundwater with high concentrations of contaminants. |
| Databáze: | OpenAIRE |
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