scholarly journals Environmental effect of sediment dredging in lake:IV influences of dredging on microbial activity and functional diversity of microbial community in sediments and its significance

2010 ◽  
Vol 22 (1) ◽  
pp. 21-28 ◽  
Author(s):  
ZHONG Jicheng ◽  
◽  
LIU Guofeng ◽  
FAN Chengxin ◽  
BAI Xiuling ◽  
...  
Keyword(s):  
Microbial Community ◽  
Microbial Activity ◽  
Functional Diversity ◽  
Environmental Effect ◽  
Sediment Dredging

Vegetation alters how soil properties and climate influence microbial activity and functional diversity in rhizosphere and bulk soil along an elevation gradient

2021 ◽  
pp. 108485
Author(s):  
Daniel Hernández-Cáceres ◽  
Alexia Stokes ◽  
Guillermo Angeles-Alvarez ◽  
Josiane Abadie ◽  
Fabien Anthelme ◽  
...  
Keyword(s):  
Soil Properties ◽  
Microbial Activity ◽  
Functional Diversity ◽  
Elevation Gradient ◽  
Bulk Soil

scholarly journals Detecting Redox Potentials Using Porous Boron Nitride/ATP-DNA Aptamer/Methylene Blue Biosensor to Monitor Microbial Activities

Micromachines ◽  
2022 ◽  
Vol 13 (1) ◽  
pp. 83
Author(s):  
Kai Guo ◽  
Zirui Song ◽  
Gaoxing Wang ◽  
Chengchun Tang
Keyword(s):  
Methylene Blue ◽  
Microbial Community ◽  
Boron Nitride ◽  
Redox Potential ◽  
Microbial Activity ◽  
Potential Change ◽  
Dna Aptamer ◽  
Redox Potentials ◽  
Microplate Reader

Microbial activity has gained attention because of its impact on the environment and the quality of people’s lives. Most of today’s methods, which include genome sequencing and electrochemistry, are costly and difficult to manage. Our group proposed a method using the redox potential change to detect microbial activity, which is rooted in the concept that metabolic activity can change the redox potential of a microbial community. The redox potential change was captured by a biosensor consisting of porous boron nitride, ATP-DNA aptamer, and methylene blue as the fluorophore. This assembly can switch on or off when there is a redox potential change, and this change leads to a fluorescence change that can be examined using a multipurpose microplate reader. The results show that this biosensor can detect microbial community changes when its composition is changed or toxic metals are ingested.

scholarly journals Environmental effect of sediment dredging in lake (I): the role of sediment dredging in reducing internal phosphorous release

2009 ◽  
Vol 21 (1) ◽  
pp. 84-93 ◽  
Author(s):  
ZHONG Jicheng ◽  
◽  
LIU Guofeng ◽  
FAN Chengxin ◽  
Zhang Lu ◽  
...  
Keyword(s):  
Environmental Effect ◽  
Sediment Dredging ◽  
Phosphorous Release

scholarly journals Steam treatment of contaminated groundwater aquifers – development of pathogenic micro-organisms in soil

2005 ◽  
Vol 7 ◽  
pp. 37-40
Author(s):  
Carsten Suhr Jacobsen ◽  
Susanne Elmholt ◽  
Carsten Bagge Jensen ◽  
Pia Bach Jakobsen ◽  
Mikkel Bender
Keyword(s):  
Microbial Community ◽  
Microbial Activity ◽  
Environmental Protection Agency ◽  
Steam Injection ◽  
Vapour Phase ◽  
Steam Treatment ◽  
Deep Aquifer ◽  
Vacuum Suction ◽  
Water Saturated ◽  
Micro Organisms

Steam treatment of contaminated soil and aquifer sediment is a promising method of cleaning soil. The treatment is based on steam injection into a water saturated porous aquifer (Gudbjerg et al. 2004), by which the heat transfers the contaminants into the vapour phase, allowing entrapment in an active carbon filter connected to a large vacuum suction device. The treatment is effective against several important groundwater contaminants, including pentachlorophenole and perchloroethylene, typically found in association with industrial processes or dry cleaning facilities. Furthermore, as an example of removal of non-aqueous phase liquids (NAPLs) large amounts of creosote have been recovered after steam injection in a deep aquifer (Kuhlmann 2002; Tse & Lo 2002). Steam treatment is dependent on the complete heating of the soil volume under treatment. The steam has a strongly adverse impact on trees and other plants with deep root systems within the soil, but no other visible effects have been reported. The aim of the activities undertaken during collaborative projects carried out by the Geological Survey of Denmark and Greenland (GEUS) and the Danish Institute of Agricultural Sciences (DJF) for the Danish Environmental Protection Agency and the local authorities in Copenhagen (Københavns Amt) was to establish to what extent the microbial community was affected by the steam treatment of the soil. A few results from the literature indicate that the microbial activity increases in steam treated soil (Richardson et al. 2002), probably due to microbial degradation of the soil contaminants in combination with microbial utilisation of heatkilled organisms. It is, however, not known whether this increased microbial activity is associated with the development of pathogenic micro-organisms; these are typically able to grow at higher temperatures than the general microbial community in soil.

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