Civil and Environmental Engineering: Recent submissions
Now showing items 321-340 of 856
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Colloid retention and mobilization mechanisms under different physicochemical conditions in porous media: A micromodel study
( Elsevier , 2021 , Article)Clear understanding of pore-scale mechanisms that control transport and retention of colloids in porous media at different physicochemical conditions is critical to improve design and efficient cleanup methodologies of ... -
Effects of soaking process on CH4-CO2 replacement efficiency for hydrate-bearing sediments
( Elsevier , 2021 , Article)CH4-CO2 replacement method has the advantages of sequestering carbon dioxide and sediment stability compared to other methods such as depressurization and thermal stimulation. However, the production efficiency using CH4-CO2 ... -
Bioinspired modeling and biogeography-based optimization of electrocoagulation parameters for enhanced heavy metal removal
( Elsevier , 2022 , Article)Electrocoagulation is an effective wastewater treatment process for the removal of heavy metals. This study focuses on deriving optimal conditions for removing heavy metals, viz. Lead (Pb), Cobalt (Co), and Manganese (Mn) ... -
LiDAR based hydro-conditioned hydrological modeling for enhancing precise conservation practice placement in agricultural watersheds
( Springer Science and Business Media B.V. , 2022 , Article)High resolution Light Detection and Ranging (LiDAR)-derived Digital Elevation Models (DEMs) improve hydrologic modeling and aid in identifying the targeted locations of best conservation practices (CPs) in agricultural ... -
Discrepancy in the Critical State Void Ratio of Poorly Graded Sand due to Shear Strain Localization
( American Society of Civil Engineers (ASCE) , 2020 , Article)The critical state (CS) concept is a theoretical framework that models the constitutive behavior of soils, including sand and other granular materials. It supports the notion of a unique postfailure state, where the soil ... -
Enhancement of Naphthalene Degradation by a Sequential Sulfate Injection Scenario in a (Semi)-Arid Coastal Soil: a Flow-Through Reactor Experiment
( Springer , 2020 , Article)Engineered sulfate injection has been introduced as an effective technology to enhance the remediation of soil and groundwater contaminated by petroleum hydrocarbons. While some studies indicate that sulfate injection is ... -
Effects of dissolved organic phase composition and salinity on the engineered sulfate application in a flow-through system
( Springer , 2020 , Article)Engineered sulfate application has been proposed as an effective remedy to enhance the rate-limited biodegradation of petroleum-hydrocarbon-contaminated subsurface environments, but the effects of dissolved organic phase ... -
3D measurements of hydrate surface area during hydrate dissociation in porous media using dynamic 3D imaging
( Elsevier , 2020 , Article)A better understanding of the kinetics of hydrate dissociation is essential to reliably predict gas production potential from natural hydrate reservoirs. Most hydrate dissociation models assume hydrates to be a constant ... -
Three-Dimensional Evaluation of Sand Particle Fracture Using Discrete-Element Method and Synchrotron Microcomputed Tomography Images
( American Society of Civil Engineers (ASCE) , 2020 , Article)Recent research showed that fracture of sand particles plays a significant role in determining the plastic bulk volumetric changes of granular materials under different loading conditions. One of the major tools used to ... -
Effects of CH4-CO2 replacement in hydrate-bearing sediments on S-wave velocity and electrical resistivity
( Elsevier , 2020 , Article)CH4-CO2 replacement has been considered as a method for methane production from hydrate-bearing sediments to maintain sediment stability. Sediment stability has been studied at both the particle scale and mesoscale. However, ... -
Dynamic 3D imaging of gas hydrate kinetics using synchrotron computed tomography
( EDP Sciences , 2020 , Conference)The availability of natural gas hydrates and the continuing increase in energy demand, motivated researchers to consider gas hydrates as a future source of energy. Fundamental understanding of hydrate dissociation kinetics ... -
3D synchrotron computed tomography study on the influence of fines on gas driven fractures in Sandy Sediments
( Elsevier , 2020 , Article)Production of methane from hydrate-bearing sediments requires hydrate dissociation for releasing mobile methane gas in sediments prior to gas production operations. Fines may migrate through or clog the pore space of ... -
Removal of petroleum hydrocarbons and sulfates from produced water using different bioelectrochemical reactor configurations
( Elsevier , 2019 , Article)Produced water (PW) is a wastewater generated in large quantities from the extraction of oil and gas. PW found to have high amounts of dissolved solids (TDS) and residual petroleum hydrocarbons causing considerable damage ... -
Effects of Fine-Grained Particles' Migration and Clogging in Porous Media on Gas Production from Hydrate-Bearing Sediments
( Hindawi Limited , 2019 , Article)The migration of fine particles in porous media has been studied for different applications, including gas production from hydrate-bearing sediments. The clogging behavior of fine particles is affected by fine particle-pore ... -
Impact of fines type on gas flow using 3D micro-computed tomography
( Society of Petroleum Engineers , 2019 , Conference)Methane hydrates are promising unconventional energy source with natural reserves above 1,000 Trillion m3. Hydrates are found in saturated sandy sediments, where multi-phase flow of gas takes place through sediment's pores, ... -
Hydrate surface area measurements during dissociation using dynamic 3d synchrotron computed tomography
( European Association of Geoscientists and Engineers, EAGE , 2019 , Conference)Availability of natural hydrates and ongoing rise in demand for energy, motivated researchers to consider hydrates as a potential energy source. Prior to gas production operations from hydrate-bearing sediments, hydrate ... -
Pore networks to characterize formation damage due to fines at varied confinement and sand shape
( European Association of Geoscientists and Engineers, EAGE , 2019 , Conference)Carbon sequestration in geological formations is in demand for many applications, especially energy production from hydrates. During gas production in a sandy hydrate reservoir, two phase flow and changes in confinement ... -
Grouping minimum REV of porosity and tortuosity based on descriptors of sand grains
( European Association of Geoscientists and Engineers, EAGE , 2019 , Conference)In sandy reservoirs, selecting a representative elementary volume (REV) for the pore scale, is essential for predictive upscaling toward the reservoir scale. The porosity and tortuosity of a sand media are used for REV ... -
Pore-scale mechanisms associated with permeability impairment in porous media: A micromodel study
( European Association of Geoscientists and Engineers, EAGE , 2019 , Conference)Recently, researchers are attracted towards the gas production from hydrate bearing sediments considering its abundance in marine continental margins and persisting demand for alternate energy. Dissociation of hydrate into ... -
Biological anodic oxidation and cathodic reduction reactions for improved bioelectrochemical treatment of petroleum refinery wastewater
( Elsevier , 2018 , Article)Bioelectrochemical systems (BESs) were evaluated for the bioelectrochemical treatment (BET) of petroleum refinery wastewater (PRW) by applying mild electrochemical potential in the range of 400-1000 mV on a single chamber ...
