Novel sodium alginate–Na+MMT hybrid composite membranes for pervaporation dehydration of isopropanol, 1,4-dioxane and tetrahydrofuran

Bhat, Santoshkumar D.; Aminabhavi, Tejraj M.

doi:10.1016/j.seppur.2005.12.025

Cited by 78 publications

(37 citation statements)

References 48 publications

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“…10), in which the improved performance is attributed to a preferential affinity of the CNTs toward benzene as well as modification of the PVA polymer-chain packing, which leads to a tailored free volume cavity size of the PVA membrane. [129] Other biohybrid systems for pervaporation dehydration processes found in the literature are based on the assembly of sodium alginate with a wide variety of inorganic solids, which include mesoporous molecular sieves (MCM-41), [130] sodium montmorillonite, [131] TiO 2 particles, [132] magnesium aluminium silicate, [133] and polyaniline-coated titanium dioxide [134] for dehydration of different organic solvents such as isopropyl alcohol, 1,4-dioxane, and tetrahydrofuran. In all these examples, the alginate-based biohybrid membranes were prepared by solution casting and then cross-linked with glutaraldehyde.…”

Section: Biohybrid Materials As Green Nanocompositesmentioning

confidence: 99%

Advances in Biomimetic and Nanostructured Biohybrid Materials

et al. 2010

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The rapid increase of interest in the field of biohybrid and biomimetic materials that exhibit improved structural and functional properties is attracting more and more researchers from life science, materials science, and nanoscience. Concomitant results offer valuable opportunities for applications that involve disciplines dealing with engineering, biotechnology, medicine and pharmacy, agriculture, nanotechnology, and others. In the current contribution we collect recent illustrative examples of assemblies between materials of biological origin and inorganic solids of different characteristics (texture, structure, and particle size). We introduce here a general overview on strategies for the preparation and conformation of biohybrids, the synergistic effects that determine the final properties of these materials, and their diverse applications, which cover areas as different as tissue engineering, drug delivery systems, biosensing devices, biocatalysis, green nanocomposites, etc.

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Section: Biohybrid Materials As Green Nanocompositesmentioning

confidence: 99%

Advances in Biomimetic and Nanostructured Biohybrid Materials

et al. 2010

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“…This effect is more favorable for water transport because water molecules occupy most of the free channels in the hydrophilic clay region of the hybrid membranes. 25 This also justifies a marked increase in water flux with temperature making hybrid membranes of this study highly water selective.…”

Section: Performance Evaluationmentioning

confidence: 53%

Novel self‐supported natural and synthetic polymer membranes for air humidification

Bhat

Manokaran

Sahu

et al. 2009

J of Applied Polymer Sci

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Novel self-supported natural and synthetic polymer membranes of chitosan-hydroxy ethyl cellulosemontmorillonite (CS-HEC-MMT) and polyvinyl alcohol (PVA)-polystyrene sulfonic acid (PSSA) are prepared by solution casting method followed by crosslinking. These membranes are employed for air humidification at varying temperatures between 30 C and 70 C and their performances are compared with commercial Nafion V R membranes. High water fluxes with desired humidified-air output have been achieved for CS-HEC-MMT and PVA-PSSA hybrid membranes at air-flow rates of 1-10 slpm. Variation in the air/water mixing ratio, dew point, and relative humidity that ultimately results in desired water flux with respect to air-flow rates are also quantified for all the membranes. Water flux values for CS-HEC-MMT are less than those for Nafion V R and PVA-PSSA membranes, but the operational stability of CS-HEC-MMT membrane is higher than PVA-PSSA and comparable with Nafion V R both of which can operate up to 70 C at repetitive cycles of humidification.

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“…Therefore, remediation processes for AMD have been limited to physical and chemical methods such as chemical precipitation, coagulation, and membrane processes, in spite of the high cost of operation and the difficulty of treating sludge with such methods (Abu Al-Rub et al, 2004;Kiran et al, 2005;Prasad and Mortimer, 2011). Recently, the use of alginate refined from seaweed as a biosorbent has been attempted for the removal of heavy metals from aqueous solutions in neutral pH environments due to its high sorption capacity, high mechanical strength in reacted solid form, and high chemical stability for recycling (Bhat and Aminabhavi, 2006;Lagoa and Rodrigues, 2009;An et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Removal of copper and cadmium in acid mine drainage using Ca-alginate beads as biosorbent

Park

Lee

2017

Geosci J

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Biosorption experiments were performed to investigate the ability of Ca-alginate beads as biosorbent for the removal of Cu and Cd in acid mine drainage (AMD). From the results of batch experiments, the removal efficiencies of both Cu and Cd for Ca-alginate beads were found to increase to 95% within 3 hours in the temperature range of 15-40 °C, indicating that it is possible to treat AMD using Ca-alginate beads within a short time period under various field conditions. For the column experiments, 381.8 g of Ca-alginate beads was packed in a Pyrex column (2.5 cm in diameter and 100 cm in height) and 119.7 liters (900 pore volumes) of AMD from the Ilgwang mine in Korea was successfully treated. The Cu and Cd removal efficiencies were maintained at levels higher than the Korean remediation goal (86% for Cu and 58% for Cd) and it was possible to treat more than 300 mL of AMD using only 1 g of Ca-alginate beads. Although AMD with a pH below 3 was injected into the column, the pH of the effluents was maintained above 3 for 1,140 pore volumes of flushing due to the buffer action of the beads. In SEM/EDS analysis of the Ca-alginate beads after the experiment, void spaces of the beads were found to be filled with precipitates of heavy metals, showing that Ca-alginate beads can be successfully used as a biosorbent for the removal of Cu and Cd in AMD.

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Novel sodium alginate–Na+MMT hybrid composite membranes for pervaporation dehydration of isopropanol, 1,4-dioxane and tetrahydrofuran

Cited by 78 publications

References 48 publications

Advances in Biomimetic and Nanostructured Biohybrid Materials

Advances in Biomimetic and Nanostructured Biohybrid Materials

Novel self‐supported natural and synthetic polymer membranes for air humidification

Removal of copper and cadmium in acid mine drainage using Ca-alginate beads as biosorbent

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