scholarly journals Microbial Community and in situ Bioremediation of Groundwater by Nitrate Removal in the Zone of a Radioactive Waste Surface Repository

2018 ◽  
Vol 9 ◽  
Author(s):  
Alexey V. Safonov ◽  
Tamara L. Babich ◽  
Diyana S. Sokolova ◽  
Denis S. Grouzdev ◽  
Tatiyana P. Tourova ◽  
...  
Keyword(s):  
Microbial Community ◽  
Radioactive Waste ◽  
Nitrate Removal ◽  
In Situ Bioremediation

Critical review on microbial community during in-situ bioremediation of heavy metals from industrial wastewater

2021 ◽  
pp. 101826
Author(s):  
Pooja Sharma ◽  
Ashutosh Kumar Pandey ◽  
Sang-Hyoun Kim ◽  
Surendra Pratap Singh ◽  
Preeti Chaturvedi ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Microbial Community ◽  
Critical Review ◽  
Industrial Wastewater ◽  
In Situ Bioremediation

scholarly journals Responses of microbial community functional structures to pilot-scale uranium in situ bioremediation

2010 ◽  
Vol 4 (8) ◽  
pp. 1060-1070 ◽  
Author(s):  
Meiying Xu ◽  
Wei-Min Wu ◽  
Liyou Wu ◽  
Zhili He ◽  
Joy D Van Nostrand ◽  
...  
Keyword(s):  
Microbial Community ◽  
Pilot Scale ◽  
In Situ Bioremediation

scholarly journals Sustained ability of a natural microbial community to remove nitrate from groundwater

2021 ◽  
Author(s):  
Charles J. Paradis ◽  
John I. Miller ◽  
Ji-Won Moon ◽  
Sarah J Spencer ◽  
Lauren Michelle Lui ◽  
...  
Keyword(s):  
Microbial Community ◽  
Electron Donor ◽  
Nitrate Removal ◽  
Well Control ◽  
Selective Enrichment ◽  
Sulfate Removal ◽  
Natural Microbial Community ◽  
History Of ◽  
And Control

Microbial-mediated nitrate removal from groundwater is widely recognized as the predominant mechanism for nitrate attenuation in contaminated aquifers and is largely dependent on the presence of a carbon-bearing electron donor. The repeated exposure of a natural microbial community to an electron donor can result in the sustained ability of the community to remove nitrate; this phenomenon has been clearly demonstrated at the laboratory scale. However, in situ demonstrations of this ability are lacking. For this study, ethanol (electron donor) was repeatedly injected into a groundwater well (treatment) for six consecutive weeks to establish the sustained ability of a microbial community to remove nitrate. A second well (control) located up-gradient was not injected with ethanol during this time. The treatment well demonstrated strong evidence of sustained ability as evident by concomitant ethanol and nitrate removal and subsequent sulfate removal upon consecutive exposures. Both wells were then monitored for six additional weeks under natural (no injection) conditions. During the final week, ethanol was injected into both treatment and control wells. The treatment well demonstrated sustained ability as evident by concomitant ethanol and nitrate removal whereas the control did not. Surprisingly, the treatment well did not indicate a sustained and selective enrichment of a microbial community. These results suggested that the predominant mechanism(s) of sustained ability likely exist at the enzymatic- and/or genetic-levels. The results of this study demonstrated that the in situ ability of a microbial community to remove nitrate can be sustained in the prolonged absence of an electron donor. Moreover, these results implied that the electron-donor exposure history of nitrate-contaminated groundwater can play an important role nitrate attenuation.

In situ bioremediation of cyanide, PAHs and organic compounds using an engineered SEquenced REactive BARrier (SEREBAR)

2006 ◽  
Vol 14 (2) ◽  
pp. 478-482
Author(s):  
Jamie Robinson ◽  
Russell Thomas ◽  
Steve Wallace ◽  
Paddy Daly ◽  
Robert Kalin
Keyword(s):  
Organic Compounds ◽  
In Situ Bioremediation ◽  
Reactive Barrier

New Technologies for Decontamination of Radioactive Substances Scattered by Nuclear Accident / Nowe Technologie Dekontaminacji Radioaktywnych Substancji Rozproszonych Przez Awarie Nuklearna

2013 ◽  
Vol 58 (1) ◽  
pp. 283-290 ◽  
Author(s):  
Y. Nishizaki ◽  
H. Miyamae ◽  
S. Ichikawa ◽  
K. Izumiya ◽  
T. Takano ◽  
...  
Keyword(s):  
Radioactive Waste ◽  
New Technologies ◽  
Ferric Hydroxide ◽  
Nuclear Accident ◽  
Radioactive Cesium ◽  
Cesium Ions ◽  
Naoh Solution ◽  
High Concentrations ◽  
Water Rinsing

Our effort for decontamination of radioactive cesium scattered widely by nuclear accident in March 2011 in Fukushima, Japan has been described. Radioactive cesium scattered widely in Japan has been accumulating in arc or plasma molten-solidified ash in waste incinerating facilities up to 90,000 Bq/kg of the radioactive waste. Water rinsing of the ash resulted in dissolution of cesium ions together with high concentrations of potassium and sodium ions. Although potassium inhibits the adsorption of cesium on zeolite, we succeeded to precipitate cesium by in-situ formation of ferric ferrocyanide and iron rust in the radioactive filtrate after rinsing of the radioactive ash with water. Because the regulation of no preservation of any kind of cyanide substances, cesium was separated from the precipitate consisting of cesium-captured ferric ferrocyanide and ferric hydroxide in diluted NaOH solution and subsequent filtration gave rise to the potassium-free radioactive filtrate. Cesium was captured by zeolite from the potassium-free radioactive filtrate. The amount of this final radioactive waste of zeolite was significantly lower than that of the arc-molten-solidified ash.

In Situ Bioremediation of Perchlorate in Groundwater

2009 ◽  
Author(s):  
Paul Hatzinger ◽  
Jay Diebold
Keyword(s):  
In Situ Bioremediation

On-site and in situ bioremediation of wood-preservative contaminated groundwater

2000 ◽  
Vol 42 (5-6) ◽  
pp. 371-376 ◽  
Author(s):  
J.A. Puhakka ◽  
K.T. Järvinen ◽  
J.H. Langwaldt ◽  
E.S. Melin ◽  
M.K. Männistö ◽  
...  
Keyword(s):  
Iron Oxidation ◽  
Wood Preservative ◽  
Pilot Scale ◽  
High Rate ◽  
Contaminated Groundwater ◽  
Groundwater Temperature ◽  
In Situ Bioremediation ◽  
Contaminated Aquifer ◽  
Fluidized Bed Process

This paper reviews ten years of research on on-site and in situ bioremediation of chlorophenol contaminated groundwater. Laboratory experiments on the development of a high-rate, fluidized-bed process resulted in a full-scale, pump-and-treat application which has operated for several years. The system operates at ambient groundwater temperature of 7 to 9°C at 2.7 d hydraulic retention time and chlorophenol removal efficiencies of 98.5 to 99.9%. The microbial ecology studies of the contaminated aquifer revealed a diverse chlorophenol-degrading community. In situ biodegradation of chlorophenols is controlled by oxygen availability, only. Laboratory and pilot-scale experiments showed the potential for in situ aquifer bioremediation with iron oxidation and precipitation as a potential problem.

In‐situ Bioremediation

2021 ◽  
pp. 1-14
Author(s):  
Shamsul Haq ◽  
Asma Absar Bhatti ◽  
Suhail Ahmad Bhat ◽  
Shafat Ahmad Mir ◽  
Ansar ul Haq
Keyword(s):  
In Situ Bioremediation
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