scholarly journals Nitrate Reduction by Redox-Activated, Polydiallyldimethylammonium-Exchanged Ferruginous Smectite

2012 ◽  
Vol 60 (5) ◽  
pp. 464-472 ◽  
Author(s):  
Kai Su ◽  
Adi Radian ◽  
Yael Mishael ◽  
Lizhong Yang ◽  
Joseph W. Stucki
Keyword(s):  
Nitrate Reduction ◽  
Ferruginous Smectite

Nitrate Reduction and Nitrite Utilization by Nitrifiers in an Unsaturated Hanford Sandy Loam

1975 ◽  
Vol 4 (2) ◽  
pp. 179-182 ◽  
Author(s):  
M. G. Volz ◽  
L. W. Belser ◽  
M. S. Ardakani ◽  
A. D. McLaren
Keyword(s):  
Nitrate Reduction ◽  
Sandy Loam

Rapid Nitrate Reduction Assay with Intact Microbial Cells or Spores

BIO-PROTOCOL ◽  
2014 ◽  
Vol 4 (12) ◽  
Author(s):  
Marco Fischer ◽  
Dörte Falke ◽  
R. Sawers
Keyword(s):  
Nitrate Reduction ◽  
Microbial Cells ◽  
Reduction Assay

NITRATE REDUCTION FROM TILE DRAINAGE IN A RESTORED OXBOW WETLAND

2016 ◽  
Author(s):  
Stephen J. Kalkhoff ◽  
◽  
Joseph Schubauer-Berigan
Keyword(s):  
Nitrate Reduction ◽  
Tile Drainage

scholarly journals Ratio of nitrate to ammonium mainly drives soil bacterial dynamics involved in nitrate reduction processes

2022 ◽  
Vol 169 ◽  
pp. 104164
Author(s):  
Tingting An ◽  
Feng Wang ◽  
Lingling Ren ◽  
Shihan Ma ◽  
Shuangyi Li ◽  
...  
Keyword(s):  
Nitrate Reduction ◽  
Reduction Processes ◽  
Bacterial Dynamics ◽  
Soil Bacterial

scholarly journals Effects of the Feeding Solution Composition on a Reductive/Oxidative Sequential Bioelectrochemical Process for Perchloroethylene Removal

Processes ◽  
2021 ◽  
Vol 9 (3) ◽  
pp. 405
Author(s):  
Edoardo Dell’Armi ◽  
Marco Zeppilli ◽  
Bruna Matturro ◽  
Simona Rossetti ◽  
Marco Petrangeli Papini ◽  
...  
Keyword(s):  
Reductive Dechlorination ◽  
Nitrate Reduction ◽  
Coulombic Efficiency ◽  
Reducing Power ◽  
Mineral Medium ◽  
Process Conditions ◽  
Microbial Electrolysis Cells ◽  
Dehalococcoides Mccartyi ◽  
In Series ◽  
Synthetic Groundwater

Chlorinated aliphatic hydrocarbons (CAHs) are common groundwater contaminants due to their improper use in several industrial activities. Specialized microorganisms are able to perform the reductive dechlorination (RD) of high-chlorinated CAHs such as perchloroethylene (PCE), while the low-chlorinated ethenes such as vinyl chloride (VC) are more susceptible to oxidative mechanisms performed by aerobic dechlorinating microorganisms. Bioelectrochemical systems can be used as an effective strategy for the stimulation of both anaerobic and aerobic microbial dechlorination, i.e., a biocathode can be used as an electron donor to perform the RD, while a bioanode can provide the oxygen necessary for the aerobic dechlorination reaction. In this study, a sequential bioelectrochemical process constituted by two membrane-less microbial electrolysis cells connected in series has been, for the first time, operated with synthetic groundwater, also containing sulphate and nitrate, to simulate more realistic process conditions due to the possible establishment of competitive processes for the reducing power, with respect to previous research made with a PCE-contaminated mineral medium (with neither sulphate nor nitrate). The shift from mineral medium to synthetic groundwater showed the establishment of sulphate and nitrate reduction and caused the temporary decrease of the PCE removal efficiency from 100% to 85%. The analysis of the RD biomarkers (i.e., Dehalococcoides mccartyi 16S rRNA and tceA, bvcA, vcrA genes) confirmed the decrement of reductive dechlorination performances after the introduction of the synthetic groundwater, also characterized by a lower ionic strength and nutrients content. On the other hand, the system self-adapted the flowing current to the increased demand for the sulphate and nitrate reduction, so that reducing power was not in defect for the RD, although RD coulombic efficiency was less.

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