نتایج جستجو برای: high permeable zone

تعداد نتایج: 2156844  

2006
M. Oostrom

At the Hanford Site, an extensive In Situ Redox Manipulation (ISRM) permeable reactive barrier was installed to prevent chromate from reaching the Columbia River. However, chromium has been detected in several wells, indicating a premature loss of the reductive capacity in the aquifer. Laboratory experiments have been conducted to investigate whether barrier reductive capacity can be enhanced b...

Journal: :Frontiers in cellular neuroscience 2016
Prasanna Sakha Aino Vesikansa Ester Orav Joonas Heikkinen Tiina-Kaisa Kukko-Lukjanov Alexandra Shintyapina Sami Franssila Ville Jokinen Henri J. Huttunen Sari E. Lauri

Kainate type of glutamate receptors (KARs) are highly expressed during early brain development and may influence refinement of the circuitry, via modulating synaptic transmission and plasticity. KARs are also localized to axons, however, their exact roles in regulating presynaptic processes remain controversial. Here, we have used a microfluidic chamber system allowing specific manipulation of ...

Journal: Geopersia 2018

Rock typing is known as the best way in heterogeneous reservoirs characterization. The rock typing methods confine to various aspects of the rocks such as multi-scale and multi-modal pore types and size, rock texture, diagenetic modifications and integration of static/dynamic data. Integration of static and dynamic behavior of rocks and their sedimentary features are practiced in this study. Po...

Journal: :Water environment research : a research publication of the Water Environment Federation 2007
Chi-hsu Hsieh Allen P Davis Brian A Needelman

Bioretention is a low-impact technology used for the treatment of stormwater runoff in developed areas. The fates of mineral nitrogen compounds in two bioretention columns (RP1 and RP2) with different media-layering characteristics were investigated under multiple loadings of simulated urban runoff. The immediate capture of nitrogen was evaluated, with nitrogen transformation reactions that occ...

Journal: :PROCEEDINGS OF CIVIL ENGINEERING IN THE OCEAN 1991

2010
Sangsoo Lee Chanwoo Park

Heat and mass transfer in a permeable fabric system used for Personal Protective Equipment (PPE) was investigated using hot air jet impingement conditions to mimic the jet exhaust of Short Take-Off and Vertical Landing (STOVL) aircraft. The STOVL aircraft uses a thrust-vectoring nozzle of the jet engine and a lift fan in order to vertically land and take off a short runaway. The jet engine exha...

Journal: Geopersia 2013

Accurate permeability estimation has always been a concern in determining flow units, assigning appropriate capillary pressure andrelative permeability curves to reservoir rock types, geological modeling, and dynamic simulation.Acoustic method can be used as analternative and effective tool for permeability determination. In this study, a four-step approach is proposed for permeability estimati...

2002
Carolyn B. Dowling Robert J. Poreda Asish R. Basu Scott L. Peters Pradeep K. Aggarwal

[1] To investigate arsenic mobility in the Bengal Basin groundwater, we sampled water wells and sediments throughout the region. There are strong correlations among high levels of dissolved arsenic and iron, ammonia, and methane, especially in samples from a single site (Laxmipur). No linkage is seen between As and agricultural tracers such as phosphate. The association of As and Fe occurs beca...

ژورنال: سلامت و محیط زیست 2015
اسلامی, اکبر, عبادی, تقی, قنبری, فرشید, مرادی, مهسا,

Background and objectives: Perchloroethylene (PCE) is categorized as contaminant of concern because of its adverse health effects and persistence in drinking water resources. Permeable reactive barrier with zero valent iron (ZVI-PRB) is a passive zone in which chlorinated ethenes are degraded in situ through the chemical reduction mechanism. The objective of the present investigation was optimi...

Journal: :Chemical Engineering Journal 2021

• Membrane for water/gases separation under high temperature and pressure is reviewed. Water permeable membrane reactors applied in various CO 2 hydrogenations The mechanism of harsh conditions discussed. Key requirements zeolite membranes applying hydrogenation Converting to valuable chemicals via catalytic presents a promising way utilization. However, many types are generally conducted (T?20...

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