scholarly journals Methylene blue adsorption onto modified lignin from sugar cane bagasse

2007 ◽  
Vol 32 (4) ◽  
pp. 63-70 ◽  
Author(s):  
N. Consolin Filho ◽  
E. C. Venancio ◽  
M. F. Barriquello ◽  
A. A. W. Hechenleitner ◽  
E. A. G. Pineda
Keyword(s):  
Methylene Blue ◽  
Acetic Acid ◽  
Ionic Strength ◽  
Sugar Cane ◽  
Sodium Acetate ◽  
Adsorption Process ◽  
Sugar Cane Bagasse ◽  
Langmuir Model ◽  
Mechanical Stirring ◽  
Modified Lignin

The adsorption kinetics and equilibrium of methylene blue (MB) onto reticulated formic lignin (RFL) from sugar cane bagasse was studied. The adsorption process is pH, temperature and ionic strength (µ) dependent and obeys the Langmuir model. Conditions for higher adsorption rate and capacity were determined. The faster adsorption (12 hours) and higher adsorption capacity (34.20 mg.g-1) were observed at pH = 5.8 (acetic acid-sodium acetate aqueous buffer), 50 ºC and 0.1 ionic strength. Under temperature (50 ºC) control and occasional mechanical stirring it took from 1 to 10 days to reach the equilibrium.

EUROPIUM OXALATE ION ASSOCIATION IN WATER

1966 ◽  
Vol 44 (24) ◽  
pp. 3057-3062 ◽  
Author(s):  
P. G. Manning
Keyword(s):  
Acetic Acid ◽  
Ionic Strength ◽  
Stability Constant ◽  
Stability Constants ◽  
Aqueous Phase ◽  
Sodium Acetate ◽  
Ion Association ◽  
Sodium Oxalate ◽  
Aqueous Sodium ◽  
Oxalate Ion

The partitioning of radiotracer 152/151Eu between aqueous sodium oxalate (Na2L) solutions and toluene solutions of thenoyltrifluoroacetone (HTTA) has been studied as a function of the oxalate concentration. The pH of the aqueous phase was controlled by means of sodium acetate – acetic acid mixtures and the ionic strength (I) by NaCl or NaClO4.At low ionic strengths (~0.05) and [L] ~10−4 M EuL+ formed, but at I = 0.95 and [L] ~10−3 M EuL2− also formed. Stability constants for the 1:1 and 1:2 (metal:ligand) complexes are reported.The magnitudes of the stepwise stability constant ratios are discussed.

Kinetics Studies of Methylene Blue Adsorption onto Spherical Chitosan Resin

2011 ◽  
Vol 233-235 ◽  
pp. 567-570
Author(s):  
Juan Qin Xue ◽  
Wei Bo Mao ◽  
Dan Dan Wen ◽  
Jing Xian Li ◽  
Yu Jie Wang
Keyword(s):  
Methylene Blue ◽  
Kinetic Equation ◽  
Ionic Strength ◽  
Adsorption Process ◽  
Sorption Kinetics ◽  
Methylene Blue Adsorption ◽  
Initial Concentration ◽  
Kinetics Studies ◽  
Kinetics Of ◽  
Chitosan Resin

Investigated the sorption kinetics of methylene blue on spherical chitosan resin. Studied the influences of ionic strength, pH， initial concentration on the adsorption process. The adsorption of methylene blue increases with the decreasing ionic strength and the increasing pH and the initial concentration of the system. Furthermore, the adsorption process correspondes with Lagergren pseudo-second kinetic equation and the finess (R2) of the model was above 0.99.

Study of the main extracted species of cobalt(II) ion with dodecylthioglycolic acid as extractor

1986 ◽  
Vol 64 (1) ◽  
pp. 15-18 ◽  
Author(s):  
P. Beneitez ◽  
S. J. Ortiz ◽  
J. Ortega
Keyword(s):  
Acetic Acid ◽  
Ionic Strength ◽  
Sodium Nitrate ◽  
Thermal Gravimetric Analysis ◽  
Sodium Acetate ◽  
Aqueous Media ◽  
Gravimetric Analysis ◽  
Thermal Gravimetric ◽  
Buffer Solutions ◽  
Organic Extractant

The distribution of cobalt(II) between water and an organic extractant (dodecylthioglycolic acid) dissolved in kerosene has been studied using a tracer of 60Co. The aqueous media wee always constituted by buffer solutions (acetic acid – sodium acetate) and the ionic strength was adjusted with sodium nitrate to 1 mol dm−3. The main species of cobalt(II) originating in the organic phase has been isolated and characterized on the basis of elemental analysis, thermal gravimetric analysis, and ir spectra.

scholarly journals SYNTHESIS AND STORAGE OF SINGLE PHENYLTIN COMPOUNDS SYNTHESIZED FROM ISOTOPICALLY ENRICHED TIN METAL

2009 ◽  
Vol 12 (17) ◽  
pp. 42-54
Author(s):  
Van Nguyen Dong ◽  
Wolfgang Frech ◽  
Solomon Tesfalidet
Keyword(s):  
Acetic Acid ◽  
Ionic Strength ◽  
Aqueous Phase ◽  
Sodium Acetate ◽  
Single Species ◽  
Liquid Extraction ◽  
Liquid Liquid Extraction ◽  
Tin Metal ◽  
And Storage ◽  
Better Than

A method combining liquid liquid extraction and chromatographic fractionation has been developed for the preparation of pure monophenyltin (MPT), diphenyltin (DPhT), and triphenyltin (TPhT), synthesized from isotope enriched Sn-metal using phenylation of SnI4 in diethylether (DEE) followed by quenching with HBr and water. After two successive extractions of the aqueous HBr phase with DEE, more than 99% of the DPT and TPhT were recovered in the combined DEE phase and 94% of the MPT remained in the aqueous phase. The MPT in the aqueous phase was extracted into dichloromethane. The organic phases were vaporised and the PhTs were re-dissolved in MeOH/water/acetic acid/sodium acetate (59/30/6/8, v/v/v/w), which was also used as storing solution. Aliquots of the two solutions containing either DPhT and TPhT or MPhT were injected into a silica based C18 column for isolating and purifying single species. The yield of the purification of MPhT, DPT, and TPht was better than 99%. At -20 °C, all the fractionated phenyltin species were stable in the storing solution for at least 197 days. When these standards were stored at 4 °C or 22°C, 4% to 6% of DPhT and TPhT degraded during 27 days. The degradation of DPT and TPht increased with the ionic strength and acidity of the storage solution.

scholarly journals Microcrystalline Cellulose from Groundnut Shell as Potential Adsorbent of Crystal Violet and Methylene Blue. Kinetics, Isotherms and Thermodynamic Studies

2020 ◽  
Vol 14 (4) ◽  
pp. 563-571
Author(s):  
Zakariyya Uba Zango ◽  
◽  
Saifullahi Shehu Imam ◽  
◽  
◽  
...  
Keyword(s):  
Methylene Blue ◽  
Free Energy ◽  
Microcrystalline Cellulose ◽  
Crystal Violet ◽  
Adsorption Process ◽  
Langmuir Model ◽  
Thermodynamic Studies ◽  
Groundnut Shell

The isolation of microcrystalline cellulose from a groundnut shell is reported. Adsorption experiments were carried out for the removal of cationic crystal violet and methylene blue and it follows Langmuir model. Positive enthalpy and negative free energy changes have shown endothermic and favorable processes. The results reflect good adsorption process.

scholarly journals THE EFFECT OF ADSORBENT TYPE AND RATIO ON REMOVAL AND ISOTHERM ADSORPTION OF METHYLENE BLUE

2020 ◽  
Vol 21 (3) ◽  
pp. 115
Author(s):  
Lia Cundari ◽  
Eki Saputra ◽  
Agus Suranto ◽  
Yandriani Yandriani ◽  
Rosalina Rosalina
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Textile Industry ◽  
Adsorption Process ◽  
Cocos Nucifera ◽  
Langmuir Model ◽  
Betel Nut ◽  
Isotherm Adsorption ◽  
Coconut Shell Activated Carbon ◽  
Blue Methylene

THE EFFECT OF ADSORBENT TYPE AND RATIO ON REMOVAL AND ISOTHERM ADSORPTION OF METHYLENE BLUE. Methylene Blue (MB) is one of the dye that are widely used in the textile industry. The wastewater from textile industry that contain MB can reduce the oxygen level in water bodies. This study aims to determine the efficiency of the adsorbent in MB removal and to analyze the isotherm adsorption. The variations conducted in this research was the type of adsorbent and its ratio. The activated carbon that used as adsorbent was fresh betel nut (Cyrtostachys lakka) activated carbon (A), regenerated betel nut activated carbon (B), and coconut shell activated carbon (Cocos nucifera) (C). The type of adsorbent was AB, AC, and BC with ratio of 1:1, 1:2, 1:3, 2:1, and 3:1. The MB concentration was analyzed by using UV-Vis spectrophotometer. Isotherm adsorption was calculated based on Freundlich and Langmuir. The best results showed that the combination of fresh and regenerated betel nuts (AB) with ratio of 3:1 can remove 97.77% of MB. The adsorption process of MB in aqueous solution followed the Langmuir model with regression over 0.99 and adsorption capacity in the range of 2.14 mg/g - 3.53 mg/g.

scholarly journals UTILIZAÇÃO DO RESÍDUO DE ERVA-MATE COMO MATERIAL ADSORVENTE DO CORANTE AZUL DE METILENO

2018 ◽  
Vol 39 (1) ◽  
pp. 227
Author(s):  
Márcia T. Veit ◽  
S. Bedin ◽  
S. M. Palácio ◽  
M. R. Fagundes-Klen ◽  
G. C. Gonçalves
Keyword(s):  
Methylene Blue ◽  
Kinetic Data ◽  
Adsorption Process ◽  
Langmuir Model ◽  
Ilex Paraguariensis ◽  
Particle Sizes ◽  
Equilibrium Data ◽  
Pseudo Second Order ◽  
The One ◽  
Kinetic Equilibrium

The residue of erva-mate (Ilex paraguariensis St. Hil) was used as a potential adsorbent to remove methylene blue in aqueous solutions. Three particle sizes and three agitation speeds were evaluated on the adsorption process. The kinetic equilibrium was reached about 350 minutes. The kinetic model of pseudo-second order was the one that best described the kinetic data of adsorption. The equilibrium data were better represented by Langmuir model with a qmax of 44.84 mg.g-1 for a temperature of 30°C. The residue of erva-mate proved to be an alternative adsorbent with potential to removal of this dye.

Synthesis and Caracterization of some New 1H-3-aryl-7-etoxycarbonyl-6-methyl-pyrazolo[5,1-c][1,2,4]triazoles

2008 ◽  
Vol 59 (1) ◽  
pp. 41-44
Author(s):  
Maria-Daniela Sofei ◽  
Maria Ilici ◽  
Valentin Badea ◽  
Carol Csunderlik ◽  
Vasile-Nicolae Bercean
Keyword(s):  
Mass Spectrometry ◽  
Acetic Acid ◽  
Nmr Spectroscopy ◽  
Sodium Acetate ◽  
Glacial Acetic Acid ◽  
Ir And Nmr Spectroscopy

The synthesis of 1H-3-aryl-7-ethoxycarbonyl-6-methyl-pyrazolo[5,1-c][1,2,4]triazoles (2) was carried out by cyclization of 1H-5-arylidenehydrazino-4-ethoxycarbonyl-3-methyl-pyrazoles (1) in the presence of bromine using glacial acetic acid as solvent and sodium acetate as base. The new nine obtained compounds were characterized by IR and NMR spectroscopy and mass spectrometry.

Novel Synthesis of 4-Benzylidene-2-((1-phenyl-3,4-dihydroisoquinoline-2(1H)-yl)methyl) oxazol-5(4H)-one Derivatives Using 1,2,3,Tetrahydroisoquinoline and their Antimicrobial Activity

2020 ◽  
Vol 17 (5) ◽  
pp. 396-403
Author(s):  
Nalla Krishna Rao ◽  
Tentu Nageswara Rao ◽  
Botsa Parvatamma ◽  
Y. Prashanthi ◽  
Ravi Kumar Cheedarala
Keyword(s):  
Antimicrobial Activity ◽  
Antibacterial Activity ◽  
Acetic Acid ◽  
Sodium Acetate ◽  
Good Activity ◽  
Activity Profile ◽  
Aryl Aldehydes ◽  
Chemical Structures ◽  
Novel Synthesis ◽  
Target Molecules

Aims: A series of six 4-benzylidene-2-((1-phenyl-3,4-dihydro isoquinoline-2(1H)-yl)methyloxazol- 5(4H)-one derivatives were synthesized by condensation of substituted aryl aldehydes with 2-(2-(1-phenyl-3,4- dihydro isoquinoline-2(1H)-acetamido)acetic acid in the presence of sodium acetate, acetic anhydride and zinc oxide as catalysts. Background: Novel Synthesis of 4-Benzylidene-2-((1-phenyl-3,4-dihy droisoquinoline-2(1H)-yl)methyl)oxazol- 5(4H)-one derivatives using 1,2,3,Tetrahydroisoquinoline and their antimicrobial activity. Objective: The title compounds can be synthesized from 1,2,3,4-tetrahydroisoquinoline. Methods: The target molecules, i.e., 4-benzylidene-2-((1-phenyl-3, 4-dihydro isoquinoline-2(1H)-yl) methyl) oxazol-5(4H)-one derivatives (8a-8f) have been synthesized from 1,2,3,4-tetrahydroisoquinoline which was prepared from benzoic acid in few steps. Results: All the six compounds were evaluated based on advanced spectral data (1H NMR, 13C NMR & LCMS), and the chemical structures of all compounds were determined by elemental analysis. Conclusion: Antibacterial activity of the derivatives was examined for the synthesized compounds and results indicate that compound with bromine substitution has a good activity profile.

Sign in / Sign up

Export Citation Format

Share Document