scholarly journals Equilibrium adsorption isotherm studies of Cu (II) and Co (II) in high concentration aqueous solutions on Ag-TiO2-modified kaolinite ceramic adsorbents

2016 ◽  
Vol 7 (5) ◽  
pp. 2279-2286 ◽  
Author(s):  
E. Ajenifuja ◽  
J. A. Ajao ◽  
E. O. B. Ajayi
Keyword(s):  
Adsorption Isotherm ◽  
Aqueous Solutions ◽  
Equilibrium Adsorption ◽  
High Concentration ◽  
Equilibrium Adsorption Isotherm

scholarly journals Adsorption Study for Trifluralin on Iraqi ? –Alumina

2012 ◽  
Vol 9 (1) ◽  
pp. 153-159 ◽  
Author(s):  
Baghdad Science Journal
Keyword(s):  
Adsorption Isotherm ◽  
Aqueous Solutions ◽  
Contact Time ◽  
Adsorption Process ◽  
Kinetic Equations ◽  
Adsorption Study ◽  
Adsorption Capacities ◽  
Experimental Parameters ◽  
Freundlich Adsorption Isotherm ◽  
Equilibrium Adsorption Isotherm

Equilibrium adsorption isotherm for the removal of trifluralin from aqueous solutions using ? –alumina clay has been studied. The result shows that the isotherms were S3 according Giels classification. The effects of various experimental parameters such as contact time, adsorbent dosage, effect of pH and temperature of trifluralin on the adsorption capacities have been investigated. The adsorption isotherms were obtained by obeying freundlich adsorption isotherm with (R2 = 0.91249-0.8149). The thermodynamic parameters have been calculated by using the adsorption process at five different temperature, the values of ?H, ?G and ?S were (_1.0625) kj. mol-1, (7.628 - 7.831) kj.mol-1 and (_2.7966 - _2.9162) kg. k-1. mol-1 respectively. The kinetic study of adsorption process has been studied depending on three kinetic equations: 1- Allergen equation 2- Morris –weber eguation 3- Reichenberg eguation. In general, the result shows the isotherm were on ?- alumina according to Giels classification.? –alumina and thermodynamic

Equilibrium Adsorption Isotherm Mechanism of Water Vapor on Zeolites 3A, 4A, X, and Y

2017 ◽  
Author(s):  
Amged Al Ezzi ◽  
Hongbin Ma
Keyword(s):  
Water Vapor ◽  
Adsorption Isotherm ◽  
Water Vapor Adsorption ◽  
Equilibrium Adsorption ◽  
Characteristic Energy ◽  
Adsorption Sites ◽  
X Zeolites ◽  
Energy Signature ◽  
Adsorptive Properties ◽  
Equilibrium Adsorption Isotherm

Many researchers have analyzed the equilibrium adsorption isotherm mechanism of water vapor molecules on 4A, 3A, Y and X zeolites for decades. The demand for moisture removal continues to increase along with the increasing stringency of requirements for product quality control and production energy efficiency. Due to the negative charge of the zeolite framework, exchangeable compensation cations such as Na+, Li+, K+, Ba2+, Mg2+, and Ca2+ might be added. These cations are located at different sites within the framework and with different concentrations. Each cation shows a strong affinity to bond with water molecules. Adsorption sites must show a characteristic energy signature corresponding to the adsorbed amount. The values of enthalpies and entropies at each site are different since the bonding strength between the moisture molecules and cations of the site is also different. These exchangeable cations have a very important contribution in determining the zeolites adsorptive properties and selectivity. This investigation of the water vapor adsorption mechanism reveals that size, location, and type of exchangeable compensation cations have a concrete relationship to the adsorption process and zeolite cage capacity.

Removal of dark blue-GL from wastewater using water hyacinth: a study of equilibrium adsorption isotherm

2014 ◽  
Vol 56 (6) ◽  
pp. 1520-1525 ◽  
Author(s):  
Md. Jahangir Alam ◽  
Bipul Chandra Das ◽  
Md. Wasikur Rahman ◽  
Biplob Kumar Biswas ◽  
Md. Maksudur Rahman Khan
Keyword(s):  
Adsorption Isotherm ◽  
Water Hyacinth ◽  
Equilibrium Adsorption ◽  
Equilibrium Adsorption Isotherm ◽  
Dark Blue
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