scholarly journals Efficient removal of cadmium(II) with SBA-15 nanoporous silica: studies on equilibrium, isotherm, kinetics and thermodynamics

2019 ◽  
Vol 9 (6) ◽  
Author(s):  
Qing-Zhou Zhai ◽  
Xiao-Dong Li
Keyword(s):  
Nanoporous Silica ◽  
Equilibrium Isotherm ◽  
Efficient Removal ◽  
Kinetics And Thermodynamics

scholarly journals Highly efficient removal of basic blue 41 with nanoporous silica

2014 ◽  
Vol 5 ◽  
pp. 49-57 ◽  
Author(s):  
Mansoureh Zarezadeh-Mehrizi ◽  
Alireza Badiei
Keyword(s):  
Nanoporous Silica ◽  
Efficient Removal ◽  
Highly Efficient

Kinetics and Thermodynamics Study of Thiosulfate Removal from Water by Calcined MgAl-CO3 Layered Double Hydroxides

2011 ◽  
Vol 396-398 ◽  
pp. 880-885
Author(s):  
Cui Yu Geng ◽  
Xiao Yu ◽  
Zheng Chang ◽  
Xiao Dong Lei ◽  
Xiao Ming Sun ◽  
...  
Keyword(s):  
Memory Effect ◽  
Layered Double Hydroxides ◽  
Reaction Rate ◽  
Langmuir Equation ◽  
Contaminated Water ◽  
Equilibrium Isotherm ◽  
Kinetics And Thermodynamics ◽  
Pseudo Second Order ◽  
Uptake Process ◽  
Double Hydroxides

Layered double hydroxides (LDHs) are potential scavengers for anionic contaminants due to their “memory effect”. Here we report the removal of thiosulfate anion from contaminated water by calcined MgAl–CO3 LDH (CLDH). The results indicate that CLDH exhibits a good performance in adsorption of thiosulfate.We studied the kinetics and thermodynamics of adsorption of thiosulfate from water. The equilibrium isotherm showed that the uptake of thiosulfate anion well agrees with the Langmuir equation, the positive value of △HӨ demonstrates the endothermic feature of the adsorption, the pseudo-second order kinetics model can be uItalic textsed to describe the uptake process and the value of Ea was calculated to be 75.898 kJ/mol. Our results suggest that the process of thiosulfate uptaking was controlled by the reaction rate of thiosulfate with the CLDH rather than diffusion.

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