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Bacteria as indicators for finding oil and gas reservoirs:A case study of the Bikaner-Nagaur Basin,Rajasthan,India

Petroleum Science 2011年第3期8卷 264-268页

作者： Mohammed Abdul Rasheed mutnuri lakshmi Deshoju Srinu Anurodh Mohan Dayal Microbiology Laboratory Petroleum Geochemistry DivisionNational Geophysical Research InstituteCouncil for Scientific and Industrial Research (CSIR)Uppal RoadHyderabad-500606India

Geo-microbial prospecting for hydrocarbons is an exploration method based on the seepage of light gaseous hydrocarbons from oil/gas reservoirs to the surface and their utilization by hydrocarbon oxidizing bacteria. These bacteria utilize hydrocarbon gases as their sole source of food and are found to be enriched in the near surface soils/sediments above the oil and gas reservoirs. The detection of anomalous populations of n-pentane and n-hexane oxidizing bacteria in the surface soils can help to evaluate the prospects for hydrocarbon exploration. A geo-microbial survey has been carried out in the Bikaner Nagaur basin to investigate the prospects for hydrocarbon exploration. In the present study, bacterial counts for n-pentane utilizing bacteria range between 2.0× 10^2 and 1.26× 10^6 cfu/gm and n-hexane utilizing bacteria range between 2.0× 10^2 and 1.21 × 10^6 cfu/gm. The bacterial concentration distribution maps show four distinct anomalies in the study area. The possibility of discovering oil or gas reservoirs using the microbiological method is emphasized by the tact that the hydrocarbon-oxidizing bacteria range between 103 and 106 cfu/gm in soil/sediment receiving hydrocarbon micro-seepages. In the present study area of the Bikaner Nagaur basin, n-pentane and n-hexane utilizing bacteria are found between 105 and 106 cfu/gm of soil sample, which is significant and thereby substantiates the seepage of lighter hydrocarbon accumulations from oil and gas reservoirs. Geo-microbial prospecting studies suggest that hydrocarbon micro-seepage of subsurface origin is present in the study area and indicate that the area has positive prospects for petroleum exploration.

关键词： Hydrocarbon utilizing bacteria microbial prospecting micro-seepage petroleum exploration

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Erratum to:Bacteria as indicators for finding oil and gas reservoirs:A case study of the Bikaner-Nagaur Basin,Rajasthan,India

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Petroleum Science 2011年第4期8卷 462-462页

作者： Rasheed, Mohammed Abdul lakshmi, mutnuri Srinu, Deshoju Dayal, Anurodh Mohan Microbiology Laboratory Petroleum Geochemistry Division National Geophysical Research Institute Council for Scientific and Industrial Research (CSIR) Hyderabad India

关键词： Erratum to case

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Probing the degradation of pharmaceuticals in urine using MFC and studying their removal efficiency by UPLC-MS/MS

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Journal of Pharmaceutical Analysis 2021年第3期11卷 320-329页

作者： Priya Sharma Devendra Kumar Srikanth mutnuri Applied Environmental Biotechnology Laboratory Birla Institute of Technology&Science(BITS)Pilani403726ZuarinagarIndia Central Sophisticated Instrumentation Facility Birla Institute of Technology&Science(BITS)Pilani403726ZuarinagarIndia Department of Pharmaceutical Sciences College of PharmacyUniversity of Nebraska Medical CenterOmahaNE68198-602USA

Nutrient recovery from source-separated human urine has attracted interest as it is rich in nitrogen and phosphorus that can be utilized as ***,urine also contains pharmaceuticals,steroid hormones,*** their removal is crucial as they have detrimental effects on the environment and human *** current study focuses on investigating the degradation of pharmaceuticals using a double-chamber microbial fuel cell(MFC).Urine was spiked with four pharmaceuticals(trimethoprim,lamivudine,levofloxacin,and estrone)at a concentration of 2 mg/*** MFC was operated for 7 months in batch mode with this spiked urine as *** degradation efficiency of the MFC was studied,for which a selective liquid chromatography-tandem mass-spectrometric method was developed for the quantitation of compounds used in the spiking experiments and was validated with a lower limit of quantification of 0.39 ng/*** maximum removal rate achieved was 96%±2%.The degradation mechanism involved processes like sorption and anoxic *** voltage curve obtained showed that the presence of pharmaceuticals had an initial negative impact on power generation along with increased organic content;however,after the reactor acclimatization,increased power output was achieved with maximum organics removal at 30 h of retention *** work opens a new perspective for the anoxic biodegradation of pharmaceuticals and can be useful in future bioremediation studies.

关键词： Pharmaceuticals Urine MFC Biodegradation Liquid chromatography mass spectroscopy

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