Preparation of NiFe 2 O 4 /polythiophene nanocomposite and its enhanced adsorptive uptake of Janus green B and Fuchsin basic from aqueous solution: Isotherm and kinetics studies

2019 ◽  
Vol 39 (3) ◽  
Author(s):  
Daud Hussain ◽  
M. Fuzail Siddiqui ◽  
Tabrez A. Khan
Keyword(s):  
Aqueous Solution ◽  
Janus Green ◽  
Kinetics Studies

Biosorption of copper ions from aqueous solution using Chlorella pyrenoidosa: Optimization, equilibrium and kinetics studies

2019 ◽  
Vol 145 ◽  
pp. 119-129 ◽  
Author(s):  
V.R. Moreira ◽  
Y.A.R. Lebron ◽  
S.J. Freire ◽  
L.V.S. Santos ◽  
F. Palladino ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Copper Ions ◽  
Chlorella Pyrenoidosa ◽  
Kinetics Studies ◽  
Equilibrium And Kinetics

Removal of brilliant green from aqueous solution by Pirus pashia leaves powder as an adsorbent: equilibrium, thermodynamic and kinetics studies

2021 ◽  
Vol 220 ◽  
pp. 409-420
Author(s):  
Rashida Fiaz ◽  
Muhammad Hafeez ◽  
Mahmood Rashid ◽  
Abrar Niaz ◽  
Azeem Bibi
Keyword(s):  
Aqueous Solution ◽  
Brilliant Green ◽  
Equilibrium Thermodynamic ◽  
Kinetics Studies

Thermodynamic and kinetics studies on adsorption of Indigo Carmine from aqueous solution by activated carbon

2019 ◽  
Vol 144 ◽  
pp. 180-189 ◽  
Author(s):  
Zahia Harrache ◽  
Moussa Abbas ◽  
Tounsia Aksil ◽  
Mohamed Trari
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Indigo Carmine ◽  
Kinetics Studies

Tautomerization tendencies of 2-acetylcycloalkanones, 2-acetyl-1,3-cycloalkanediones, and cyclic β-keto esters of five- and six-membered rings

2001 ◽  
Vol 79 (4) ◽  
pp. 448-454 ◽  
Author(s):  
Antonio Rojas ◽  
Alfonso Perez-Encabo ◽  
Ignacio Herraiz-Sierra ◽  
Carlos A Blanco
Keyword(s):  
Aqueous Solution ◽  
Rate Constants ◽  
Nmr Spectra ◽  
Tautomeric Equilibrium ◽  
Concentration Effects ◽  
Keto Esters ◽  
H Nmr ◽  
Kinetics Studies ◽  
Dilute Aqueous Solution ◽  
C Nmr

NMR and kinetics studies of the tautomeric equilibrium of 2-acetylcycloalkanones, 2-acetyl-1,3-cycloalkanediones, and methyl 2-oxocycloalkanecarboxylates of five- and six-membered rings have been carried out. By comparing 1H NMR and 13C NMR spectra recorded in D2O–DOCD3 and CDCl3, with those results derived using a bromination kinetic procedure in dilute aqueous solution, information concerning tautomeric interconversion is provided. Some discussions considering ionisation equilibria and rate constants involved have also been considered. Solvent and concentration effects on keto-enol equilibria have also been discussed.Key words: 2-acetylcycloalkanones, 2-acetyl-1,3-cycloalkanediones, methyl 2-oxocycloalkanecarboxylates, equilibrium, tautomerization, ionization.

Adsorption of Congo Red from Aqueous Solution onto Chitosan/Rectorite Composite

2013 ◽  
Vol 690-693 ◽  
pp. 438-441 ◽  
Author(s):  
Tao Feng ◽  
Lei Xu
Keyword(s):  
Aqueous Solution ◽  
Adsorption Kinetics ◽  
Congo Red ◽  
Adsorption Process ◽  
Order Equation ◽  
Interlayer Distance ◽  
Kinetics Studies ◽  
Pseudo Second Order ◽  
Cr Concentration ◽  
Cr Uptake

The chitosan/rectorite composite was prepared and characterized by XRD. The interlayer distance of rectorite was enlarged from 2.53 nm to 3.01 nm. Congo red (CR) was selected as a model anionic dye and the adsorption tests of CR onto chitosan/rectorite composite were carried out. The results showed that the CR adsorption process is dependent on pH and initial CR concentration and temperature. The maximal CR uptake by chitosan/rectorite composite was 73.8 mg g-1 in the test. Adsorption kinetics studies indicated that the sorption processes were better fitted by pseudo-second order equation.

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