Enhanced biodegradation of beta- and delta-hexachlorocyclohexane in the presence of alpha- and gamma-isomers in contaminated soils
The chlorinated insecticide hexachlorocyclohexane (HCH) has been used extensively in the past, and contaminated sites are present throughout the world. Toward their bioremediation, we isolated a bacterium Pseudomonas aeruginosa ITRC-5 that mediates the degradation of all the four major isomers of HCH under aerobic conditions, both in liquid-culture and contaminated soils. In liquid-culture, the degradation of alpha- and gamma-HCH is rapid and is accompanied with the release of 5.6 micromole chloride ions and 4.1 micromole CO2 micromole(-1) HCH-isomer. The degradation of beta- and delta-isomers is slow, accompanied with the release of 0.9 micromole chloride ions micromole(-1) HCH-isomer, and results in a transient metabolite 2,3,4,5,6-pentachlorocyclohexan-1-ol. The strain ITRC-5 also mediates the degradation of alpha-, beta-, gamma-, and delta-isomers in contaminated soils, where degradation of otherwise persistent beta- and delta-HCH is enhanced severalfold in the presence of alpha- or gamma-HCH. The degradation of soil-applied beta- and delta-HCH under aerobic conditions has not been reported earlier. The isolate ITRC-5 therefore demonstrates potential for the bioremediation of HCH-wastes and contaminated soils.
| Medienart: |
Artikel |
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| Erscheinungsjahr: |
2005 |
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| Erschienen: |
2005 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:39 |
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| Enthalten in: |
Environmental science & technology - 39(2005), 11 vom: 01. Juni, Seite 4005-11 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Kumar, Manish [VerfasserIn] |
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| Anmerkungen: |
Date Completed 06.10.2005 Date Revised 15.07.2019 published: Print Citation Status MEDLINE |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM156234106 |
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| 100 | 1 | |a Kumar, Manish |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Enhanced biodegradation of beta- and delta-hexachlorocyclohexane in the presence of alpha- and gamma-isomers in contaminated soils |
| 264 | 1 | |c 2005 | |
| 336 | |a Text |b txt |2 rdacontent | ||
| 337 | |a ohne Hilfsmittel zu benutzen |b n |2 rdamedia | ||
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| 500 | |a Date Completed 06.10.2005 | ||
| 500 | |a Date Revised 15.07.2019 | ||
| 500 | |a published: Print | ||
| 500 | |a Citation Status MEDLINE | ||
| 520 | |a The chlorinated insecticide hexachlorocyclohexane (HCH) has been used extensively in the past, and contaminated sites are present throughout the world. Toward their bioremediation, we isolated a bacterium Pseudomonas aeruginosa ITRC-5 that mediates the degradation of all the four major isomers of HCH under aerobic conditions, both in liquid-culture and contaminated soils. In liquid-culture, the degradation of alpha- and gamma-HCH is rapid and is accompanied with the release of 5.6 micromole chloride ions and 4.1 micromole CO2 micromole(-1) HCH-isomer. The degradation of beta- and delta-isomers is slow, accompanied with the release of 0.9 micromole chloride ions micromole(-1) HCH-isomer, and results in a transient metabolite 2,3,4,5,6-pentachlorocyclohexan-1-ol. The strain ITRC-5 also mediates the degradation of alpha-, beta-, gamma-, and delta-isomers in contaminated soils, where degradation of otherwise persistent beta- and delta-HCH is enhanced severalfold in the presence of alpha- or gamma-HCH. The degradation of soil-applied beta- and delta-HCH under aerobic conditions has not been reported earlier. The isolate ITRC-5 therefore demonstrates potential for the bioremediation of HCH-wastes and contaminated soils | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Research Support, Non-U.S. Gov't | |
| 650 | 7 | |a Chlorides |2 NLM | |
| 650 | 7 | |a Ions |2 NLM | |
| 650 | 7 | |a Soil Pollutants |2 NLM | |
| 650 | 7 | |a Carbon Dioxide |2 NLM | |
| 650 | 7 | |a 142M471B3J |2 NLM | |
| 650 | 7 | |a pentachlorocyclohexene |2 NLM | |
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| 650 | 7 | |a alpha-hexachlorocyclohexane |2 NLM | |
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| 650 | 7 | |a delta-hexachlorocyclohexane |2 NLM | |
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| 650 | 7 | |a Hexachlorocyclohexane |2 NLM | |
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| 650 | 7 | |a beta-hexachlorocyclohexane |2 NLM | |
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| 700 | 1 | |a Chaudhary, Pankaj |e verfasserin |4 aut | |
| 700 | 1 | |a Dwivedi, Manish |e verfasserin |4 aut | |
| 700 | 1 | |a Kumar, Ranjan |e verfasserin |4 aut | |
| 700 | 1 | |a Paul, Debarati |e verfasserin |4 aut | |
| 700 | 1 | |a Jain, Rakesh K |e verfasserin |4 aut | |
| 700 | 1 | |a Garg, Satyendra K |e verfasserin |4 aut | |
| 700 | 1 | |a Kumar, Ashwani |e verfasserin |4 aut | |
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| 773 | 1 | 8 | |g volume:39 |g year:2005 |g number:11 |g day:01 |g month:06 |g pages:4005-11 |
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