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1. Enhanced remediation of Cr(VI)-contaminated groundwater by coupling electrokinetics with ZVI/Fe3O4/AC-based permeable reactive barrier

Author:
Cao, Ruolin; Liu, Shiqing; Yang, Xinyu; Wang, Chunfeng; Wang, Yanbin; Wang, Wanfeng; Pi, Yunqing
Source:
Journal of environmental sciences (China) 2022 v.112 pp. 280-290
ISSN:
1001-0742
Subject:
permeability,   etc   ; X-ray diffraction; X-ray photoelectron spectroscopy; chemical speciation; electron transfer; groundwater; heat treatment; iron; redox potential; remediation; China;     Show all 11 Subjects
Abstract:
... Although widely used in permeation reaction barrier (PRB) for strengthening the removal of various heavy metals, zero-valent iron (ZVI) is limited by various inherent drawbacks, such as easy passivation and poor electron transfer. As a solution, a synergistic system with PRB and electrokinetics (PRB-EK) was established and applied for the efficient removal of Cr(VI)-contaminated groundwater. As th ...
DOI:
10.1016/j.jes.2021.05.002

2. Electron beam induced modification of ZIF-8 membrane permeation properties

Author:
Miao, Yurun; Lee, Dennis T.; Dorneles de Mello, Matheus; Abdel-Rahman, Mohammed K.; Corkery, Peter; Boscoboinik, J. Anibal; Fairbrother, D. Howard; Tsapatsis, Michael
Source:
Chemical communications 2021 v.57 no.43 pp. 5250-5253
ISSN:
1364-548X
Subject:
permeability,   etc   ; exposure duration; irradiation;     Show all 3 Subjects
Abstract:
... Modification of the gas permeation properties of ZIF-8 membranes using electron beam irradiation is reported. 3.8 and 3.2 fold enhancements in ideal selectivity for CO₂/N₂ and CO₂/CH₄ can be achieved with less than 1 min exposure time. ...
DOI:
10.1039/d1cc00252j

3. Insight into particle detachment in clogging of porous media; a pore scale study using lattice Boltzmann method

Author:
Parvan, Amin; Jafari, Saeed; Rahnama, Mohammad; Norouzi-Apourvari, Saeid; Raoof, Amir
Source:
Advances in water resources 2021 v.151 pp. 103888
ISSN:
0309-1708
Subject:
permeability,   etc   ; porosity; topology; water;     Show all 4 Subjects
Abstract:
... Clogging of porous media is controlled by attachment of particles and their subsequent detachment. In this study, we explore particle transport at the pore scale by considering attachment and detachment processes. We use pore structures of three samples which have similar topological properties but different initial porosities. The main focus is on particle detachment, after they are attached to t ...
DOI:
10.1016/j.advwatres.2021.103888

4. Oil/water separation membranes with a fluorine island structure for stable high flux

Author:
He, Mingrui; Wang, Panpan; Zhang, Runnan; Jiang, Zhongyi; He, Xu; Ma, Jun
Source:
Journal of materials chemistry A 2021 v.9 no.11 pp. 6905-6912
ISSN:
2050-7496
Subject:
permeability,   etc   ; fluorine; hydrophilicity; oils;     Show all 4 Subjects
Abstract:
... Stable high flux is a big challenge for oil/water separation membranes due to the adhesivity and spreadability of oil droplets. Membranes with hydrophilic modification usually have high basic flux, but suffer from a serious flux decline. Membranes with synergic hydrophilic and low-surface-energy (LSE) modification show a remarkably relieved flux decline, but at the expense of low basic flux. The L ...
DOI:
10.1039/d0ta10197d

5. Permeability and Porosity Development during the Carbonization of Coals of Different Coking Pressures

Author:
Casal, M. Dolores; Díaz-Faes, Elvira; Barriocanal, Carmen
Source:
Energy & fuels 2021 v.35 no.7 pp. 5808-5817
ISSN:
1520-5029
Subject:
permeability,   etc   ; carbonization; energy; porosity;     Show all 4 Subjects
Abstract:
... To obtain a better understanding of the development of coking pressure during the carbonization process, the plastic and semicoke layers of nine coking coals were investigated. The permeability of the plastic layer to the passage of gas and the porosity of the semicoke were analyzed at two temperatures, 500 and 800 °C. In the case of dangerous coals, there was a wide zone of low permeability cover ...
DOI:
10.1021/acs.energyfuels.0c04219

6. Equivalency and Replaceability between Different Permeability Models of Hydrate-Bearing Porous Media When Applied to Numerical Modeling of Hydrate Dissociation: Implications for Model Selection and Parameter Assignment

Author:
Wang, Ziming; Wang, Qilin; Fan, Zhiqiang; Wei, Wei; Li, Mengxin; Wang, Yanfeng; Huang, Xuehua; Song, Yongchen; Wang, Dayong
Source:
Energy & fuels 2021 v.35 no.7 pp. 6090-6100
ISSN:
1520-5029
Subject:
permeability,   etc   ; dissociation; energy; temperature;     Show all 4 Subjects
Abstract:
... As a key input parameter in laboratory-scale numerical simulations of the hydrate dissociation process, effective and intrinsic permeability is among the most important factors controlling the hydrate dissociation dynamics and the productivity of hydrate-bearing porous media. A wide variety of permeability models have been developed to capture the effective permeability variations due to hydrate d ...
DOI:
10.1021/acs.energyfuels.1c00015

7. Non-local diffusion models for fractured porous media with pressure tests applications

Author:
Hernández, D.; Herrera-Hernández, E.C.
Source:
Advances in water resources 2021 v.149 pp. 103854
ISSN:
0309-1708
Subject:
permeability,   etc   ; oils; porosity; water;     Show all 4 Subjects
Abstract:
... In this work, different Generalized Double Porosity Models for anomalous fluid flow in fractured porous media are presented, and transient production decline applications discussed. The effects of subdiffusive and superdiffusive flows in fracture networks coupled to subdiffusive transport inside the matrix are explored, and some insights into how to identify these types of flow in geological forma ...
DOI:
10.1016/j.advwatres.2021.103854

8. Systematic experimental assessment of concentration polarization and inhibition in Pd-based membranes for hydrogen purification

Author:
Tosto, Eleonora; Martinez-Diaz, David; Sanz, Raúl; Azzato, Giulia; Calles, José Antonio; Medrano, José Antonio; Fernandez, Ekain; Pacheco Tanaka, David Alfredo; Gallucci, Fausto; Alique, David; Caravella, Alessio
Source:
Fuel processing technology 2021 v.213 pp. 106661
ISSN:
0378-3820
Subject:
permeability,   etc   ; equipment; hydrogen; temperature;     Show all 4 Subjects
Abstract:
... In this work, we show the application of a systematic general experimental analysis to estimate in a relatively easy way the paired effects of concentration polarization and inhibition in the hydrogen permeation through diverse supported Pd-based membranes as functions of temperature and mixture composition. For this purpose, three different membranes are fabricated and tested under pure‑hydrogen ...
DOI:
10.1016/j.fuproc.2020.106661

9. Theoretical investigation of unsteady MHD flow within non-stationary porous plates

Author:
Manzoor, Tareq; Nazar, K.; Iqbal, S.; Manzoor, Habib Ullah
Source:
Heliyon 2021 v.7 no.3 pp. e06567
ISSN:
2405-8440
Subject:
permeability,   etc   ; magnetic fields; models;     Show all 3 Subjects
Abstract:
... Porous-permeable structures with magnetohydrodynamics (MHD) flow have a lot of applications in various disciplines of engineering. Transport of ferro-fluid in magnetic field has attained more focus in recent years. In this work, an analysis is accomplished to investigate the MHD transport of in-compressible viscid ferro-fluid (electrically conductive) amid two movable porous-permeable plates (PPP) ...
DOI:
10.1016/j.heliyon.2021.e06567

10. Synthesis of high-performance Co-based ZIF-67 membrane for H2 separation by using cobalt ions chelated PIM-1 as interface layer

Author:
Wu, Rong; Li, Yanhong; Huang, Aisheng
Source:
Journal of membrane science 2021 v.620 pp. 118841
ISSN:
0376-7388
Subject:
permeability,   etc   ; cobalt; polymers;     Show all 3 Subjects
Abstract:
... So far, the reports of ZIF-67 membranes with high permselectivity are rather scarce because ZIF-67 prefers to homogeneous nucleation and growth in the reaction solution rather than heterogeneous nucleation and growth on the substrates. Inspired by the fact that homologous metal ions is helpful to be acted as nucleation centers to promote the preparation of continuous MOF membranes, in this work, w ...
DOI:
10.1016/j.memsci.2020.118841

11. Concurrent characterization of through-thickness permeability and compaction of fiber reinforcements

Author:
Kabachi, M.A; Stettler, L.; Arreguin, S.; Ermanni, P.
Source:
Composites 2021 v.141 pp. 106203
ISSN:
1359-835X
Subject:
permeability,   etc   ; cameras; glass fibers;     Show all 3 Subjects
Abstract:
... Flow-induced fiber-bed compaction has considerable effects on through-thickness permeability due to resulting changes in fiber-volume-fractions. This study introduces a novel method for the simultaneous characterization of compaction and unsaturated out-of-plane permeability of engineering textiles in one single experiment. The measurement technique relies on visually tracking flow-front positions ...
DOI:
10.1016/j.compositesa.2020.106203

12. The validity of the time-lag method for the characterization of mixed-matrix membranes

Author:
Wu, Haoyu; Thibault, Jules; Kruczek, Boguslaw
Source:
Journal of membrane science 2021 v.618 pp. 118715
ISSN:
0376-7388
Subject:
permeability,   etc   ; diffusivity; polymers; solubility;     Show all 4 Subjects
Abstract:
... The time-lag method is commonly used for the characterization of gas separation membranes. It allows the determination of the diffusion, permeability, and solubility coefficients from a single dynamic gas permeation experiment. This method is widely used for any membrane material, including glassy polymers, polymers with intrinsic microporosity, and mixed-matrix membranes. However, it is understoo ...
DOI:
10.1016/j.memsci.2020.118715

13. The Use of Alternative Strategies for Enhanced Nanoparticle Delivery to Solid Tumors

Author:
Izci, Mukaddes; Maksoudian, Christy; Manshian, Bella B.; Soenen, Stefaan J.
Source:
Chemical reviews 2021 v.121 no.3 pp. 1746-1803
ISSN:
1520-6890
Subject:
permeability,   etc   ; blood flow; neoplasms;     Show all 3 Subjects
Abstract:
... Nanomaterial (NM) delivery to solid tumors has been the focus of intense research for over a decade. Classically, scientists have tried to improve NM delivery by employing passive or active targeting strategies, making use of the so-called enhanced permeability and retention (EPR) effect. This phenomenon is made possible due to the leaky tumor vasculature through which NMs can leave the bloodstrea ...
DOI:
10.1021/acs.chemrev.0c00779

14. Characterization of effective permeability of prepreg fibers under autoclave molding process conditions using process model simulations

Author:
Maji, Prosenjit; Jain, Arpit; Dutta, Nibedita; Siddiqui, Ahmed Ovais; Niyogi, Debdarsan; Neogi, Swati
Source:
The journal of the Textile Institute 2021 v.112 no.1 pp. 1-7
ISSN:
1754-2340
Subject:
permeability,   etc   ; fabrics; prediction;     Show all 3 Subjects
Abstract:
... During autoclave molding process of prepreg composites, resin flow occurs through the fibers in the transverse direction of the layup due to applied external pressure. The extent of resin flow depends largely on the permeability of the reinforcement used in prepreg, and hence, the permeability is an important parameter for process modeling and simulations of composites fabrication processes. Most ...
DOI:
10.1080/00405000.2020.1748803

15. Influence of air void structures on the coefficient of permeability of asphalt mixtures

Author:
Chen, Siyu; You, Zhanping; Yang, Song-Lin; Garcia, Alvaro; Rose, Luke
Source:
Powder technology 2021 v.377 pp. 1-9
ISSN:
0032-5910
Subject:
permeability,   etc   ; air; anisotropy; bitumen;     Show all 4 Subjects
Abstract:
... The objectives of this study are (i) to investigate the air void properties and (ii) predict the three-dimensional coefficient of permeability of asphalt mixtures by means of the Lattice Boltzmann Method (LBM). Asphalt mixtures with five different gradations and air voids content ranging from 13.7% to 26% were used in this study. The three-dimensional structures of air voids in asphalt mixtures we ...
DOI:
10.1016/j.powtec.2020.08.082

16. Methods for Delivery and Distribution of Amendments for Subsurface Remediation: A Critical Review

Author:
Muller, Katherine A.; Johnson, Christian D.; Bagwell, Christopher E.; Truex, Michael J.
Source:
Ground water monitoring & remediation 2021 v.41 no.1 pp. 46-75
ISSN:
1069-3629
Subject:
permeability,   etc   ; groundwater; remediation;     Show all 3 Subjects
Abstract:
... The ability to reliably deliver and widely distribute remedial amendments through the subsurface environment is of paramount importance to achieve cleanup objectives for contaminated sediments and groundwater for protection of sensitive environmental habitats and natural resources. A wide range of amendments, delivery techniques, and subsurface access methods are available. However, the applicabil ...
DOI:
10.1111/gwmr.12418

17. Methods to determine the kinetic performance limit of contemporary chromatographic techniques

Author:
Broeckhoven, Ken; Desmet, Gert
Source:
Journal of separation science 2021 v.44 no.1 pp. 323-339
ISSN:
1615-9306
Subject:
permeability,   etc   ; chromatography; liquids; separation;     Show all 4 Subjects
Abstract:
... By combining separation efficiency data as a function of flow rate with the column permeability, the kinetic plot method allows to determine the limits of separation power (time vs. efficiency) of different chromatographic techniques and methods. The technique can be applied for all different types of chromatography (liquid, gas, or supercritical fluid), for different types of column morphologies ...
DOI:
10.1002/jssc.202000779

18. Management of Urban Stormwater at Block-Level (MUST-B): A New Approach for Potential Analysis of Decentralized Stormwater Management Systems

Author:
Khurelbaatar, Ganbaatar; van Afferden, Manfred; Ueberham, Maximilian; Stefan, Michael; Geyler, Stefan; Müller, Roland A.
Source:
Water 2021 v.13 no.3
ISSN:
2073-4441
Subject:
permeability; soil permeability,   etc   ; rain; stormwater; stormwater management; Germany;     Show all 6 Subjects
Abstract:
... Cities worldwide are facing problems to mitigate the impact of urban stormwater runoff caused by the increasing occurrence of heavy rainfall events and urban re-densification. This study presents a new approach for estimating the potential of the Management of Urban STormwater at Block-level (MUST-B) by decentralized blue-green infrastructures here called low-impact developments (LIDs) for already ...
DOI:
10.3390/w13030378

19. Chiral separation of β-cyclodextrin modified graphene oxide membranes with a complete enantioseparation performance

Author:
Li, Xiaoxiao; Chen, Qibin; Tong, Xuefeng; Zhang, Shaoze; Liu, Honglai
Source:
Journal of membrane science 2021 v.634 pp. 119350
ISSN:
0376-7388
Subject:
permeability,   etc   ; enantiomers; enantioselectivity; graphene oxide;     Show all 4 Subjects
Abstract:
... The separation of racemates remains a great challenge as they are enantiomers with similar chemical structures and physicochemical properties in achiral environments. Recently, graphene oxide (GO) based membranes modified with various chiral selectors had been proved to allow for both high permeation flux and enantioselectivity. Herein, mono(6-amino-6-deoxy)-beta-cyclodextrin (β-CD) was selected t ...
DOI:
10.1016/j.memsci.2021.119350

20. Effect of concentration on virus removal for ultrafiltration membrane in drinking water production

Author:
Jacquet, N.; Wurtzer, S.; Darracq, G.; Wyart, Y.; Moulin, L.; Moulin, P.
Source:
Journal of membrane science 2021 v.634 pp. 119417
ISSN:
0376-7388
Subject:
permeability,   etc   ; bacteriophages; chlorine; groundwater; ultrafiltration;     Show all 5 Subjects
Abstract:
... Removal of pathogenic microorganisms as viruses during drinking water production was evaluated by ultrafiltration. Two enteric viruses (ADV 41 and CV-B5) were compared to the MS2 bacteriophage, largely used in literature and by membrane producers as enteric virus surrogate. The effect of feed concentration of viruses on the ultrafiltration efficiency has been assessed. For the three viruses, low r ...
DOI:
10.1016/j.memsci.2021.119417