Influence of rhamnolipids, produced by Pseudomonas aeruginosa NCAIM(P), B001380 on Cr(VI) removal capacity in liquid medium
| Autor: | M Ivanka Karadzic, D Snezana Nikolic-Mandic, S Natasa Avramovic |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
Electrospray ionization
chemistry.chemical_element law.invention Metal lcsh:Chemistry chemistry.chemical_compound Chromium Bioremediation law bioremediation Pseudomonas rhamnolipids chromium (VI) Chromatography biology Strain (chemistry) Rhamnolipid General Chemistry biology.organism_classification chemistry lcsh:QD1-999 visual_art visual_art.visual_art_medium Atomic absorption spectroscopy Nuclear chemistry |
| Zdroj: | Journal of the Serbian Chemical Society, Vol 78, Iss 5, Pp 639-651 (2013) |
| ISSN: | 0352-5139 |
| Popis: | Pseudomonas aeruginosa NCAIM(P), B001380, a propitious bacterial strain isolated from mineral cutting oil was identified to be chromium tolerant and a producer of biosurfactant rhamnolipid (RL) with potential application in heavy metal bioremediation. Culture growth, RL production and Cr(VI) removal capacity of the strain in the presence of 50 mg L-1 (I) and 100 mg L-1 of Cr(VI) (II) were studied. Maximum of RL production were found in the late-stationary phase at 72 h for both Cr(VI)-amended cultures: I (236 mg L-1) and II (160 mg L-1), as well as the maximum of Cr(VI) removal capacity: 70 % (I) and 57 % (II). The amount of Cr in RL preparation II was 22 mg mg-1 determined by flame atomic absorption spectroscopy (FAAS). Appearance of a new band at 914 cm-1 in infrared (IR) spectrum of RL (II) indicated a significant proof for possible coordination of CrO42-ion with RL. The effect of Cr(VI) on monorhamnolipids (RL1) and dirhamnolipids (RL2) distribution and its ratio were studied by electrospray ionization mass spectrometry (ESI-MS). An increase was observed in a RL2/RL1 ratio for II compared to control. |
| Databáze: | OpenAIRE |
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