ORCID Profile
0000-0001-8173-7159
Current Organisations
CNRS en Alpes
,
Grenoble Alpes University
,
Victoria University
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Publisher: Elsevier BV
Date: 2012
Publisher: Elsevier BV
Date: 06-2011
Publisher: Elsevier BV
Date: 02-2012
DOI: 10.1016/J.WATRES.2011.10.052
Abstract: In vapour permeation the feed is a vapour, not a liquid as in pervaporation. The process employs a polymeric membrane as a semi-permeable barrier between the feed side under high pressure and the permeate side under low pressure. Separation is achieved by the different degrees to which components are dissolved in and diffuse through the membrane, the system working according to a solution-diffusion mechanism. The materials used in the membrane depend upon the types of compounds being separated, so water transport is favoured by hydrophilic material, whether organic or inorganic. The process is used for the dehydration of natural gas and various organic solvents, notably alcohol as biofuel, as well as the removal of water from air and its recovery from waste steam. Waste steam can be found in almost every plant/factory where steam is used. It is frequently contaminated and cannot be reused. Discharging the spent steam to the atmosphere is a serious energy loss and environmental issue. Recycling the steam can significantly improve the overall energy efficiency of an industry, which is responsible for massive CO(2) emissions. Steam separation at high fluxes and temperatures has been accomplished with a composite poly(vinyl alcohol) membrane containing silica nanoparticles, and also, less efficiently, with an inorganic zeolite membrane.
Publisher: Elsevier BV
Date: 08-2003
Publisher: Elsevier BV
Date: 11-2021
Publisher: Elsevier BV
Date: 1996
Publisher: Elsevier BV
Date: 10-1997
Publisher: American Chemical Society (ACS)
Date: 30-06-2007
DOI: 10.1021/IE070085D
Publisher: Springer Science and Business Media LLC
Date: 10-05-2018
Publisher: Royal Society of Chemistry (RSC)
Date: 1991
DOI: 10.1039/JM9910100423
Publisher: Elsevier BV
Date: 09-2007
DOI: 10.1016/J.WATRES.2007.06.008
Abstract: The fouling of a spiral wound reverse osmosis (RO) membrane after nearly 1 year of service in a brackish water treatment plant was investigated using optical and electron microscopic methods, Fourier transform infrared spectroscopy (FTIR) and inductively coupled plasma atomic emission spectrometry (ICP-AES). Both the top surface and the cross-section of the fouled membrane were analysed to monitor the development of the fouling layer. It has been found that the extent of fouling was uneven across the membrane surface with regions underneath or in the vicinity of the strands of the feed spacer being more severely affected. Fouling appeared to have developed through different stages. In particular, it consisted of an initial thin fouling layer of an amorphous matrix with embedded particulate matter. The amorphous matrix comprised organic-Al-P complexes and the particulate matter was mostly aluminium silicates. Subsequently, as the fouling layer reached a thickness of about 5-7microm, further amorphous material, which is suggested to include extracellular polymeric substances such as polysaccharides, started to deposit on top of the existing fouling layer. This secondary amorphous material did not seem to contain any particulate matter nor any inorganic elements within it, but acted as a substrate upon which aluminium silicate crystals grew exclusively in the absence of other foulants, including natural organic matter (NOM).
Publisher: Elsevier
Date: 2015
Publisher: MIT Press - Journals
Date: 08-2013
DOI: 10.1162/JOCN_A_00397
Abstract: Using large natural scenes filtered in spatial frequencies, we aimed to demonstrate that spatial frequency processing could not only be retinotopically mapped but could also be lateralized in both hemispheres. For this purpose, participants performed a categorization task using large black and white photographs of natural scenes (indoors vs. outdoors, with a visual angle of 24° × 18°) filtered in low spatial frequencies (LSF), high spatial frequencies (HSF), and nonfiltered scenes, in block-designed fMRI recording sessions. At the group level, the comparison between the spatial frequency content of scenes revealed first that, compared with HSF, LSF scene categorization elicited activation in the anterior half of the calcarine fissures linked to the peripheral visual field, whereas, compared with LSF, HSF scene categorization elicited activation in the posterior part of the occipital lobes, which are linked to the fovea, according to the retinotopic property of visual areas. At the in idual level, functional activations projected on retinotopic maps revealed that LSF processing was mapped in the anterior part of V1, whereas HSF processing was mapped in the posterior and ventral part of V2, V3, and V4. Moreover, at the group level, direct interhemispheric comparisons performed on the same fMRI data highlighted a right-sided occipito-temporal predominance for LSF processing and a left-sided temporal cortex predominance for HSF processing, in accordance with hemispheric specialization theories. By using suitable method of analysis on the same data, our results enabled us to demonstrate for the first time that spatial frequencies processing is mapped retinotopically and lateralized in human occipital cortex.
Publisher: Elsevier BV
Date: 12-2012
Publisher: Elsevier BV
Date: 11-2011
Publisher: CSIRO Publishing
Date: 1991
DOI: 10.1071/CH9910645
Abstract: The morphology observed by transmission electron microscopy of rare earth oxides, prepared by two different routes, has been related to adsorption characteristics for nitrogen at 77 K. The most common morphology was that of thin sheets, then small equiaxed particles, and, more rarely, rod-like particles. The presence of small equiaxed particles was found to be a prerequisite for adsorption hysteresis. Evaluation of linear 't' plots indicated freedom from micropores in all s les, but positive deviations in the presence of sheet morphology at high relative pressures left open the possibility of wedge-like pores in these s les.
Publisher: Elsevier BV
Date: 07-2013
Publisher: Elsevier BV
Date: 04-2013
Publisher: Elsevier BV
Date: 09-2014
Publisher: Elsevier BV
Date: 04-2009
DOI: 10.1016/J.WATRES.2008.12.052
Abstract: Wastewater containing low levels of ammonia (100 mg/L) has been simulated in experiments with sweep gas membrane distillation at pH 11.5. The effects of feed temperature, gas flow rate and feed flow rate on ammonia removal, permeate flux and selectivity were investigated. The feed temperature is a crucial operating factor, with increasing feed temperature increasing the permeate flux significantly, but reducing the selectivity. The best-performing conditions of highest temperature and fastest gas flow rate resulted in 97% removal of the ammonia, to give a treated water containing only 3.3 mg/L of ammonia.
Publisher: Elsevier BV
Date: 09-2002
Publisher: Elsevier BV
Date: 10-1997
Publisher: IWA Publishing
Date: 09-2015
Publisher: Inderscience Publishers
Date: 2008
Publisher: Elsevier BV
Date: 05-2015
Publisher: Elsevier BV
Date: 08-1998
Publisher: Elsevier BV
Date: 02-2004
Publisher: The Chemical Society of Japan
Date: 08-1998
DOI: 10.1246/CL.1998.793
Publisher: Elsevier BV
Date: 07-2014
Publisher: Elsevier BV
Date: 11-2006
DOI: 10.1016/J.JCIS.2006.07.038
Abstract: The sorption capacity of high-yield kraft fibers for Cd2+, Co2+, and Ni2+ increased with pH and concentration of the cations in the liquid phase. Within the concentration range for the experiments, which was less than 2 mM, the experimental results fitted the Langmuir, Freundlich, and Sips models with regression coefficient greater than 0.97. Of the three cations investigated, Ni2+ had the highest sorption affinity, followed by Cd2+ and Co2+. The effect of the hydrated radius on the sorption affinity was discussed. Thermodynamically, the sorption was spontaneous and exothermic in the temperature range 283-308 K.
Publisher: Springer Science and Business Media LLC
Date: 06-01-2022
DOI: 10.1057/S41599-021-01018-Y
Abstract: In Vietnam, a country where religious expression is widespread, many gods and goddesses are commonly worshipped. Among those, Bà Tổ Cô (Family Goddess) is widely worshipped in the North of Vietnam due to her exceptional background as unmarried, young, and having spiritual roots, unlike other national and heroic figures. This article examines the sanctity of the Family Goddess by decoding the terms, worshippers, beliefs and practices, sacred encounters and supports. The research is a final result of decade-long field trips, archival study, and in-depth interviews with various stakeholders. The research findings show that the veneration of the Family Goddess in Northern Vietnam is a continuity of a long-standing tradition of worshipping female deities in Asia and thus emphasising the need to maintain this unique intangible heritage as a crucial part of Vietnamese cultural ersity.
Publisher: Elsevier BV
Date: 06-1999
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4SM00589A
Abstract: A sufficient and well dispersed silica network stabilizes the nanostructure in cross-linked poly(ethylene glycol) diacrylate templated from hexagonal lyotropic liquid crystals (LLC).
Publisher: Wiley
Date: 18-10-2012
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C1SM06526B
Publisher: Springer Science and Business Media LLC
Date: 28-09-2010
Publisher: Springer Science and Business Media LLC
Date: 05-1997
DOI: 10.1007/BF02477508
Publisher: Elsevier BV
Date: 04-2014
Publisher: Elsevier BV
Date: 09-2009
Publisher: Elsevier BV
Date: 03-2011
Publisher: Elsevier BV
Date: 09-1993
Publisher: Wiley
Date: 12-2011
DOI: 10.1002/APP.33397
Publisher: Elsevier BV
Date: 12-2022
Publisher: Elsevier BV
Date: 07-1993
Publisher: Elsevier BV
Date: 07-2005
DOI: 10.1016/J.JCIS.2005.02.005
Abstract: The sorption of Na+ and Ca2+ from aqueous solutions onto unbleached kraft fiber was investigated. The sorption kinetics was found to be highly dependent on pH, initial concentration, and temperature. The sorption rate increased as the initial concentration and pH were increased. Thermodynamic and kinetic results indicated that the sorption of Na+ and Ca2+ onto kraft fiber was exothermic, reversible, and spontaneous with activation energies of 11.0 and 23.3 kJ/mol, respectively. The sorption kinetics followed a pseudo-second-order model and the equilibrium data followed the Langmuir isotherms. The fiber sorption capacities calculated from the Langmuir isotherms were similar to the fiber charges determined by potentiometric titration at pH > 7.
Publisher: Informa UK Limited
Date: 10-2011
Publisher: Pleiades Publishing Ltd
Date: 06-2010
Publisher: MDPI AG
Date: 03-09-2018
Abstract: Desalination by pervaporation is a membrane process that is yet to be realized for commercial application. To investigate the feasibility and viability of scaling up, a process engineering model was developed to evaluate the energy requirement based on the experimental study of a hybrid polyvinyl alcohol/maleic acid/tetraethyl orthosilicate (PVA/MA/TEOS) Pervaporation Membrane. The energy consumption includes the external heating and cooling required for the feed and permeate streams, as well as the electrical power associated with pumps for re-circulating feed and maintaining vacuum. The thermal energy requirement is significant (e.g., up to 2609 MJ/m3 of thermal energy) and is required to maintain the feed stream at 65 °C in recirculation mode. The electrical energy requirement is very small ( .2 kWh/m3 of required at 65 °C feed temperature at steady state) with the vacuum pump contributing to the majority of the electrical energy. The energy required for the pervaporation process was also compared to other desalination processes such as Reverse Osmosis (RO), Multi-stage Flash (MSF), and Multiple Effect Distillation (MED). The electrical energy requirement for pervaporation is the lowest among these desalination technologies. However, the thermal energy needed for pervaporation is significant. Pervaporation may be attractive when the process is integrated with waste heat and heat recovery option and used in niche applications such as RO brine concentration or salt recovery.
Publisher: Elsevier BV
Date: 1997
Publisher: Elsevier BV
Date: 09-2006
DOI: 10.1016/J.JCIS.2006.05.051
Abstract: In a binary system the sorption of Na(+) and Ca(2+) by kraft pulps follows a second order kinetics, and the isotherms follow the Langmuir model. The sorption capacity is dependent on pH and temperature. The thermodynamic parameters indicate that the sorption is exothermic and spontaneous. In a single-component system, the sorption capacity of the kraft pulp for Na(+) and Ca(2+) increases with the degree of dissociation of ionizable cellulosic components of the kraft pulp fibres. In a binary system the exchange of Na(+) and Ca(2+) is highly dependent on pH. SEM and X-ray analysis indicated that at pH above 11.0 calcium forms a precipitate bound to the surface of the fibres.
Publisher: Elsevier BV
Date: 06-2016
Publisher: Springer Science and Business Media LLC
Date: 1992
DOI: 10.1007/BF02403646
Publisher: Springer Science and Business Media LLC
Date: 14-07-2007
Publisher: Elsevier BV
Date: 05-2010
Publisher: Elsevier BV
Date: 08-2004
Publisher: Elsevier BV
Date: 2009
Publisher: Trans Tech Publications, Ltd.
Date: 07-10-2011
DOI: 10.4028/WWW.SCIENTIFIC.NET/AMR.356-360.1708
Abstract: Two kinds of SnS 2 materials were prepared through the hydrothermal route, respectively using thioacetamide (TAA) and thiourea as the sulfur source. The as-prepared SnS 2 s les were characterized with X-ray diffraction (XRD), scanning electron microscopy (SEM) and N 2 -sorption. The results showed that the SnS 2 s le prepared with TAA had a lengthening shape, a smaller size and surface area, but a better adsorption of rhodamine B (RhB). X-ray photoelectron spectroscopy (XPS) analysis was used to confirm that there was an interaction between RhB molecule and SnS 2 contributing to the strong adsorption of RhB.
Location: Australia
No related grants have been discovered for Manh Hoang.