Sequestering of thorium ions from aqueous media on rice husk: Equilibrium, kinetic and thermodynamic studies

2015 ◽  
Vol 103 (5) ◽  
Author(s):  
Shagufta Zafar ◽  
Nasir Khalid ◽  
Muhammad Latif Mirza
Keyword(s):  
Metal Concentration ◽  
Rice Husk ◽  
Aqueous Media ◽  
Equilibration Time ◽  
Adsorption Behaviour ◽  
Batch Method ◽  
Radiotracer Technique ◽  
Thermodynamic Studies ◽  
Kinetic And Thermodynamic Studies

AbstractThe adsorption behaviour of thorium on rice husk has been studied by optimizing different parameters like nature of electrolyte, amount of adsorbent, equilibration time, metal concentration, and temperature, employing batch method and radiotracer technique. Maximum adsorption was observed at 0.0001 mol L

Zirconium decontamination from aqueous media using lateritic minerals

2005 ◽  
Vol 93 (7) ◽  
Author(s):  
Nasir Khalid ◽  
Muhammad Daud ◽  
Shujaat Ahmad
Keyword(s):  
Aqueous Solutions ◽  
Aqueous Media ◽  
Sorption Behavior ◽  
Equilibration Time ◽  
Chemical Parameters ◽  
Batch Method ◽  
Radiotracer Technique ◽  
Physico Chemical ◽  
Selection Of

AbstractThe sorption behavior of zirconium on minerals from a lateritic weathering has been carried out to evaluate its potential for the decontamination of zirconium ions from aqueous solutions. Various physico-chemical parameters such as selection of appropriate electrolyte, equilibration time, amount of adsorbent, concentration of adsorbate, effect of diverse ions and temperature were studied in order to simulate the best conditions under which this material can be used as an adsorbent, employing batch method and radiotracer technique. Maximum adsorption was observed at 0.005 mol L

Nitrile-calixarene grafted magnetic graphene oxide for removal of arsenic from aqueous media: Isotherm, kinetic and thermodynamic studies

Chemosphere ◽  
2021 ◽  
Vol 268 ◽  
pp. 129348
Author(s):  
Shahabaldin Rezania ◽  
Muhammad Afzal Kamboh ◽  
Sadaf Sadia Arian ◽  
Abdulwahed F. Alrefaei ◽  
Hussein H. Alkhamis ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Aqueous Media ◽  
Magnetic Graphene Oxide ◽  
Thermodynamic Studies ◽  
Magnetic Graphene ◽  
Removal Of Arsenic ◽  
Kinetic And Thermodynamic Studies

REMOVAL OF CADMIUM (II) FROM AQUEOUS MEDIA USING COOH/TUD-1 MESOPOROUS SOLID. KINETIC AND THERMODYNAMIC STUDIES

2014 ◽  
Vol 13 (10) ◽  
pp. 2675-2686 ◽  
Author(s):  
Ioana Fechete ◽  
Nabila Bensacia ◽  
Saad Moulay ◽  
Saida Debbih-Boustila ◽  
Anne Boos ◽  
...  
Keyword(s):  
Aqueous Media ◽  
Thermodynamic Studies ◽  
Kinetic And Thermodynamic Studies

Adsorptive removal of phenol from aqueous solutions using chemically activated rice husk ash: equilibrium, kinetic, and thermodynamic studies

2019 ◽  
Vol 158 ◽  
pp. 233-244 ◽  
Author(s):  
Ahmad Jonidi Jafari ◽  
Ahamd Alahabadi ◽  
Mohmmad Hossien Saghi ◽  
Zahra Rezai ◽  
Ayoob Rastegar ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Thermodynamic Studies ◽  
Adsorptive Removal ◽  
Kinetic And Thermodynamic Studies

scholarly journals Sorption of Coated and Uncoated Nanocrystalline Zinc Oxide from Aqueous Solutions onto Raw and Acetylated Cellulose Sago Hampas: Equilibrium, Kinetic and Thermodynamic Studies

2021 ◽  
Vol 411 ◽  
pp. 37-54
Author(s):  
Eric Kwabena Droepenu ◽  
Boon Siong Wee ◽  
Suk Fun Chin ◽  
Kuan Ying Kok
Keyword(s):  
Zinc Oxide ◽  
Sorption Process ◽  
Equilibration Time ◽  
Zno Nps ◽  
Thermodynamic Studies ◽  
Water And Wastewater ◽  
Physical And Chemical ◽  
Kinetic And Thermodynamic Studies ◽  
Nanocrystalline Zinc Oxide ◽  
Maximum Removal

In this study, sorption efficiency of coated (C-) and uncoated (U-) zinc oxide nanoparticles (ZnO-NPs) in aqueous solution onto raw sago hampas (RSH) and acetylated sago hampas (ACSH) was studied. Physical and chemical characteristics of both the sorbate and sorbents were analysed using various characterization techniques. The mechanism of the sorption process was evaluated using equilibrium isotherms, kinetic and thermodynamic studies. From the study, maximum percentage removal of both sorbate ions were achieved at an equilibration time of 100 minutes with an optimum sorbate mass of 2.0 g per 50 ml. The study recorded a maximum % removal of 85.1% & 87.6% for C-and U-ZnO-NPs (< 50 nm) onto RSH and 90.0% & 91.1% onto ACSH. Langmuir isotherm fitted well for the sorption process with the highest efficiency of 0.793 mg/g recorded for C-ZnO-NPs onto RSH. Pseudo-second model best described the sorption process. An exothermic and non-spontaneous sorption process was realised in all the sorption studies except that of U-ZnO-NPs (< 50 nm) onto ACSH which became spontaneous as temperature increased. Based on the findings from the multiple approaches employed, both sorbents could be proposed as viable alternatives to act as a green sorbent in the removal of ZnO-NPs from water and wastewater.

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