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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/9114
Title: Biodegradation of toluene under seasonal and diurnal fluctuations of soil-water temperature
Authors: Yadav B.K.
Shrestha S.R.
Hassanizadeh S.M.
Published in: Water, Air, and Soil Pollution
Abstract: An increasing interest in bioremediation of hydrocarbon polluted sites raises the question of the influence of seasonal and diurnal changes on soil-water temperature on biodegradation of BTEX, a widespread group of (sub)-surface contaminants. Therefore, we investigated the impact of a wide range of varying soil-water temperature on biodegradation of toluene under aerobic conditions. To see the seasonal impact of temperature, three sets of batch experiments were conducted at three different constant temperatures: 10°C, 21°C, and 30°C. These conditions were considered to represent (1) winter, (2) spring and/or autumn, and (3) summer seasons, respectively, at many polluted sites. Three additional sets of batch experiments were performed under fluctuating soil-water temperature cases (21<>10°C, 30<>21°C, and 10<>30°C) to mimic the day-night temperature patterns expected during the year. The batches were put at two different temperatures alternatively to represent the day (high-temperature) and night (low-temperature) times. The results of constant- and fluctuating-temperature experiments show that toluene degradation is strongly dependent on soil-water temperature level. An almost two-fold increase in toluene degradation time was observed for every 10°C decrease in temperature for constant-temperature cases. Under fluctuating-temperature conditions, toluene degraders were able to overcome the temperature stress and continued thriving during all considered weather scenarios. However, a slightly longer time was taken compared to the corresponding time at daily mean temperature conditions. The findings of this study are directly useful for bioremediation of hydrocarbon-polluted sites having significant diurnal and seasonal variations of soil-water temperature. © 2012 The Author(s).
Citation: Water, Air, and Soil Pollution (2012), 223(7): 3579-3588
URI: https://doi.org/10.1007/s11270-011-1052-x
http://repository.iitr.ac.in/handle/123456789/9114
Issue Date: 2012
Keywords: Biodegradation
BTEX
Soil-water pollution
Toluene
Varying temperature
ISSN: 496979
Author Scopus IDs: 57209494362
55210038100
7003438301
Author Affiliations: Yadav, B.K., Environmental Hydrogeology Group, Faculty of Geosciences, University of Utrecht, Budapestlaan 4, 3508 TA Utrecht, Netherlands, Department of Civil Engineering, Indian Institute of Technology Delhi, New Delhi, Hauz Khas 110016, India
Shrestha, S.R., Environmental Hydrogeology Group, Faculty of Geosciences, University of Utrecht, Budapestlaan 4, 3508 TA Utrecht, Netherlands
Hassanizadeh, S.M., Environmental Hydrogeology Group, Faculty of Geosciences, University of Utrecht, Budapestlaan 4, 3508 TA Utrecht, Netherlands
Funding Details: Acknowledgements We would like to acknowledge the King Abdullah University of Science and Technology (KAUST) for extending the financial support to this research as part of the SOWACOR Project. The authors are also thankful to the Department of Science and Technology (DST), India, for extending the financial aid in the form of the Ramanujan research award.
Corresponding Author: Yadav, B.K.; Department of Civil Engineering, Indian Institute of Technology Delhi, New Delhi, Hauz Khas 110016, India; email: brijeshy@gmail.com
Appears in Collections:Journal Publications [HY]

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