Enhanced degradation of 2-nitrotoluene by immobilized cells of Micrococcus sp. strain SMN-1
| Autor: | Sikandar I. Mulla, Manjunatha P. Talwar, Robertcyril S. Hoskeri, Harichandra Z. Ninnekar, Zabin K. Bagewadi |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Environmental Engineering
food.ingredient Health Toxicology and Mutagenesis Sodium Polyacrylamide Micrococcus chemistry.chemical_element chemistry.chemical_compound food Environmental Chemistry Agar 2-Nitrotoluene Chromatography Strain (chemistry) biology Public Health Environmental and Occupational Health General Medicine General Chemistry Biodegradation biology.organism_classification Pollution Biodegradation Environmental chemistry Degradation (geology) Environmental Pollutants Toluene |
| Zdroj: | Chemosphere. 90(6) |
| ISSN: | 1879-1298 |
| Popis: | Nitrotoluenes are the toxic pollutants of the environment because of their large scale use in the production of explosives. Biodegradation of such chemicals by microorganisms may provide an effective method for their detoxification. We have studied the degradation of 2-nitrotoluene by cells of Micrococcus sp. strain SMN-1 immobilized in various matrices such as polyurethane foam (PUF), sodium alginate (SA), sodium alginate–polyvinyl alcohol (SA–PVA), agar and polyacrylamide. The rate of degradation of 15 and 30 mM 2-nitrotoluene by freely suspended cells and immobilized cells in batches and fed-batch with shaken cultures were compared. The PUF-immobilized cells achieved higher degradation of 15 and 30 mM 2-nitrotoluene than freely suspended cells and the cells immobilized in SA–PVA, polyacrylamide, SA and agar. The PUF-immobilized cells could be reused more than 24 cycles without loosing their degradation capacity and showed more tolerance to pH and temperature changes than freely suspended cells. These results revealed the enhanced rate of degradation of 2-nitrotoluene by PUF-immobilized cells of Micrococcus sp. strain SMN-1. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect