scholarly journals Fabrication of MoO3 Nanowire-based Membrane Devices for the Selective Adsorption of Cationic Dyes from Aqueous Solutions with High Performance and Reusability

Micromachines ◽  
2019 ◽  
Vol 10 (9) ◽  
pp. 586 ◽  
Author(s):  
Zhang ◽  
Park
Keyword(s):  
Methylene Blue ◽  
Methyl Orange ◽  
Aqueous Solutions ◽  
Rhodamine B ◽  
High Performance ◽  
Selective Adsorption ◽  
Treatment Method ◽  
Cationic Dyes ◽  
Adsorption Ability ◽  
Anionic Dye

A series of ultralong (up to tens of micrometers) MoO3 nanowire-based membranes were synthesized for the treatment of aqueous solutions containing the cationic dyes methylene blue (MB) and rhodamine B (RhB). This treatment method possesses extremely rapid and superhigh adsorbability (up to 521 and 321 mg/g for MB and RhB, respectively), as well excellent selective adsorption ability of cationic dyes with respect to the anionic dye methyl orange (MO). Moreover, the cationic dyes on the membrane can be desorbed easily, and reusability is good.

REMOVAL OF CATIONIC DYES FROM AQUEOUS SOLUTION USING CARBON-ENCAPSULATED SUPERPARAMAGNETIC COLLOIDAL NANOPARTICLES AS ADSORBENT

NANO ◽  
2013 ◽  
Vol 08 (01) ◽  
pp. 1350006 ◽  
Author(s):  
HUI WANG ◽  
XUHUI ZHOU ◽  
QIANWANG CHEN
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Aqueous Solutions ◽  
Removal Efficiency ◽  
Rhodamine B ◽  
Negative Charge ◽  
Methyl Violet ◽  
Cationic Dyes ◽  
Colloidal Nanoparticles ◽  
Ph Values

This paper demonstrates the application of negative charge-functionalized carbon-encapsulated superparamagnetic colloidal nanoparticles being as nanoadsorbents for the removal of cationic dyes from aqueous solutions. Adsorption characteristics of the magnetic nanoadsorbents were examined using methylene blue as adsorbates, exhibiting excellent ability to remove cationic dyes from aqueous solutions. In addition, the influences of uptake time, concentration of nanoadsorbents and pH values of aqueous solution on the removal of cationic dyes have been discussed. Results show that the removal efficiency can be up to 90% at a dye concentration of 100 mg L-1 when the uptake time is 1 min, which indicates rapidly removal ability of the magnetic nanoadsorbents. Furthermore, other cationic dyes including rhodamine B and methyl violet were used to examine the universality of nanoadsorbents.

scholarly journals Sulfobetaine Cryogels for Preferential Adsorption of Methyl Orange from Mixed Dye Solutions

Polymers ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 208
Author(s):  
Ramona B. J. Ihlenburg ◽  
Anne-Catherine Lehnen ◽  
Joachim Koetz ◽  
Andreas Taubert
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Methyl Orange ◽  
Dye Removal ◽  
Selective Adsorption ◽  
Water Soluble ◽  
Organic Substances ◽  
Preferential Adsorption ◽  
Dimethyl Ammonium ◽  
Dye Solutions

New cryogels for selective dye removal from aqueous solution were prepared by free radical polymerization from the highly water-soluble crosslinker N,N,N’,N’-tetramethyl-N,N’-bis(2-ethylmethacrylate)-propyl-1,3-diammonium dibromide and the sulfobetaine monomer 2-(N-3-sulfopropyl-N,N-dimethyl ammonium)ethyl methacrylate. The resulting white and opaque cryogels have micrometer sized pores with a smaller substructure. They adsorb methyl orange (MO) but not methylene blue (MB) from aqueous solution. Mixtures of MO and MB can be separated through selective adsorption of the MO to the cryogels while the MB remains in solution. The resulting cryogels are thus candidates for the removal of hazardous organic substances, as exemplified by MO and MB, from water. Clearly, it is possible that the cryogels are also potentially interesting for removal of other compounds such as pharmaceuticals or pesticides, but this must be investigated further.

Phase-controlled synthesis of bismuth oxide polymorphs for photocatalytic applications

2018 ◽  
Vol 2 (9) ◽  
pp. 1664-1673 ◽  
Author(s):  
Thangavel Selvamani ◽  
Sambandam Anandan ◽  
Luis Granone ◽  
Detlef W. Bahnemann ◽  
Muthupandian Ashokkumar
Keyword(s):  
Methylene Blue ◽  
Methyl Orange ◽  
Bismuth Oxide ◽  
Rhodamine B ◽  
Controlled Synthesis ◽  
Acid Orange 7 ◽  
Acid Orange ◽  
Photocatalytic Applications

Bismuth oxide polymorphs (β-Bi2O3 nanoparticles and α-Bi2O3 coral-like morphology) were synthesized and they show an enhanced efficacy for the degradation of rhodamine B and acid orange 7 as compared to that of methylene blue and methyl orange under simulated solar illumination.

MOFs containing a linear bis-pyridyl-tris-amide and angular carboxylates: exploration of proton conductivity, water vapor and dye sorptions

2019 ◽  
Vol 6 (1) ◽  
pp. 184-191 ◽  
Author(s):  
Satyanarayana K. Konavarapu ◽  
Anindita Goswami ◽  
Anaparthi Ganesh Kumar ◽  
Susanta Banerjee ◽  
Kumar Biradha
Keyword(s):  
Methylene Blue ◽  
Water Vapor ◽  
Proton Conductivity ◽  
Crystal Violet ◽  
Selective Adsorption ◽  
Cationic Dyes ◽  
Adsorption Of Water ◽  
Conductivity Water ◽  
Adsorption Of Water Vapor

Four new MOFs were shown to have appreciable proton conductivities, selective adsorption of water vapor over nitrogen and a tendency to selectively adsorb cationic dyes such as methylene blue and crystal violet.

scholarly journals Preparation of Graphene Oxide Sand Composites as Super Adsorbent for Water Purification Application

2018 ◽  
Vol 156 ◽  
pp. 05019 ◽  
Author(s):  
Eko Andrijanto ◽  
Gatot Subiyanto ◽  
Nina Marlina ◽  
Hanifa Citra ◽  
Cahya Lintang
Keyword(s):  
Methylene Blue ◽  
Graphene Oxide ◽  
Methyl Orange ◽  
Water Purification ◽  
Rhodamine B ◽  
Solution Method ◽  
Color Removal ◽  
Contaminated Water ◽  
Graphene Oxides ◽  
Xrd Diffraction

This paper describes a method to synthesize a graphene oxide sand composites (GSC) as filter media (absorbent) for water purification. Graphene oxides is synthesized from graphite using modification of Hummer's method. The graphene oxide sand composites is prepared through solution method at 100 °C. The graphene oxide is analyzed using XRD, FTIR to confirm its formation. The FTIR spectrum and XRD diffraction pattern confirmed that the graphene oxide synthesized by this method is able to convert graphite into graphene oxide. Performance tests were conducted using a column to purify contaminated water which was mimicked using dyes such as rhodamine B, methylene blue and methyl orange.The initial concentration for all dyes were set for 5, 10, 25, 50 and 100 ppm. The color removal for methylene blue was 100% at all concentrations. However, for the rhodamine B and methyl orange, the color removal achieved 100% for the first three concentration 5, 10 and 25 ppm. The higher concentration of 50 and 100 ppm, the removal were slightly reduced. For the 50 ppm, the color removal of rhodamine B was 98% and for methyl orange 87% respectively. At 100 ppm, the color removal for rhodamine B drops to 92% and for the methyl orange was only 77% respectively. The GSC was very effective to remove methylene blue dyes at any concentration followed by rhodamine B and methyl orange. This GSC composite material is potential to be applied for water purification.

Removal of Basic Dyes (Rhodamine B and Methylene Blue) from Aqueous Solutions Using Bagasse Fly Ash

2000 ◽  
Vol 35 (13) ◽  
pp. 2097-2113 ◽  
Author(s):  
VINOD K. GUPTA ◽  
DINESH MOHAN ◽  
SAURABH SHARMA ◽  
MONICA SHARMA
Keyword(s):  
Methylene Blue ◽  
Fly Ash ◽  
Aqueous Solutions ◽  
Rhodamine B ◽  
Bagasse Fly Ash ◽  
Basic Dyes
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