2012 ◽  
Vol 20 (6) ◽  
pp. 3743-3750 ◽  
Author(s):  
Huan Feng ◽  
Yu Qian ◽  
Frank J. Gallagher ◽  
Meiyin Wu ◽  
Weiguo Zhang ◽  
...  

2016 ◽  
Vol 41 ◽  
pp. 172-182 ◽  
Author(s):  
Huan Feng ◽  
Yu Qian ◽  
Frank J. Gallagher ◽  
Weiguo Zhang ◽  
Lizhong Yu ◽  
...  

2015 ◽  
Vol 3 (4) ◽  
pp. SAB43-SAB56 ◽  
Author(s):  
Carlos A. Mendonça ◽  
Rory Doherty ◽  
Nathan D. Amaral ◽  
Blathnaid McPolin ◽  
Michael J. Larkin ◽  
...  

The accumulation of biogenic greenhouse gases (methane, carbon dioxide) in organic sediments is an important factor in the redevelopment and risk management of many brownfield sites. Good practice with brownfield site characterization requires the identification of free-gas phases and pathways that allow its migration and release at the ground surface. Gas pockets trapped in the subsurface have contrasting properties with the surrounding porous media that favor their detection using geophysical methods. We have developed a case study in which pockets of gas were intercepted with multilevel monitoring wells, and their lateral continuity was monitored over time using resistivity. We have developed a novel interpretation procedure based on Archie’s law to evaluate changes in water and gas content with respect to a mean background medium. We have used induced polarization data to account for errors in applying Archie’s law due to the contribution of surface conductivity effects. Mosaics defined by changes in water saturation allowed the recognition of gas migration and groundwater infiltration routes and the association of gas and groundwater fluxes. The inference on flux patterns was analyzed by taking into account pressure measurements in trapped gas reservoirs and by metagenomic analysis of the microbiological content, which was retrieved from suspended sediments in groundwater sampled in multilevel monitoring wells. A conceptual model combining physical and microbiological subsurface processes suggested that biogas trapped at depth may have the ability to quickly travel to the surface.


2013 ◽  
Vol 438-439 ◽  
pp. 1830-1835 ◽  
Author(s):  
Pierluigi Morano ◽  
Francesco Tajani

The involvement of the private investor in urban regeneration projects makes the verification of the financial feasibility of the initiative inevitable. Thus, the applicability of Break Even Analysis (BEA) is tested in this study. BEA is a financial analysis technique that allows to study the impact that technical, economic and organizational decisions may have on the financial feasibility of the project. The main methodological and operational aspects of BEA are discussed, with the application of an urban regeneration of a former brownfield site located in a city of Southern Italy being developed. The success of the experiment confirms the possibility to use BEA for the financial analysis of projects, especially in the early design stages.


2021 ◽  
Vol 8 ◽  
Author(s):  
Andrea Teixeira Ustra ◽  
Carlos Mendonça ◽  
Aruã da Silva Leite ◽  
Melina Macouin ◽  
Rory Doherty ◽  
...  

In this work we present results of the magnetic properties characterization of sediment samples from a brownfield site that is generating methane biogas in São Paulo–Brazil. We applied interpretation procedures (frequency dependent susceptibility and time-dependent Isothermal Remanent Magnetization) appropriate to study the ultrafine magnetic fraction response of the samples. The higher content of superparamagnetic (SP) particles correlates well with the detected biogas pockets, suggesting that the methanogens activity produces these ultrafine particles, different from the magnetic particles at other depth levels. We propose the use of two simple measurement and interpretation techniques to identify such magnetic particles fingerprints. The results presented here support the use of environmental magnetism techniques to investigate biogeochemical processes of anaerobic microbial activity.


2021 ◽  
Author(s):  
Lewis Ellison

<p>Phenomena such as industrialisation and urbanisation </p><p>are associated with the built environment. Both contribute to </p><p>pollution of urban soil, water and air in various ways. This in turn </p><p>contributes in part to climate change and biodiversity loss. It </p><p>is therefore the responsibility of the built environment, and the </p><p>professionals associated with its design and functioning, to </p><p>remediate the aforementioned effects. </p><p>This research investigates the spatial arrangement of </p><p>bioremediation techniques (the process of using fungus, </p><p>bacteria, and plants to break down and purify environmental </p><p>pollutants) within architecture in order to remediate brownfield </p><p>sites to a state where they contribute to a regenerative built </p><p>environment. </p><p>This investigation utilises a design-led research approach </p><p>of examining the spatial arrangement of bioremediation </p><p>techniques within architecture and proposes a series of design </p><p>interventions at one of New Zealand’s most contaminated </p><p>sites. This research proposes practical methods of applying </p><p>restoration design to remediate brownfield sites to move </p><p>towards a regenerative development model. The land and </p><p>waterways that make up brownfield sites should be celebrated </p><p>for their ecological significance, and remediated, rather than </p><p>ignored so as to build positive human-nature relationships. </p><p>Research findings include that bioremediation and </p><p>architecture cannot exist separately if brownfield site </p><p>remediation and development is to contribute to a regenerative </p><p>built environment. It is critical to use architecture itself as one </p><p>means of educating users about the ecological processes </p><p>of brownfield site bioremediation. This is important in order </p><p>to establish a stewardship role within individuals and local </p><p>communities as a way to work towards the protection and </p><p>successful restoration of these degraded sites. This research </p><p>also found that the restoration of brownfield sites towards </p><p>regenerative development requires architecture and built </p><p>environment infrastructure to be adaptive to future climate </p><p>change conditions. The bioremediation techniques examined </p><p>in this research could be used to retrofit existing buildings and </p><p>designed into new additions and/or retrofits so that architecture </p><p>can adapt to climate change impacts, particularly sea-level rise </p><p>and increased storm surge.</p>


2020 ◽  
Vol 36 (6) ◽  
pp. 550-564
Author(s):  
M. Vallefuoco ◽  
S. Tamburrino ◽  
M. Sacchi ◽  
A. Guarino ◽  
G. Di Martino ◽  
...  

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