Kinetics of strontium ion adsorption on natural clay samples

2005 ◽  
Vol 266 (2) ◽  
pp. 289-293 ◽  
Author(s):  
Z. Nemes ◽  
N. M. Nagy ◽  
J. Kónya
Keyword(s):  
Ion Adsorption ◽  
Natural Clay ◽  
Kinetics Of ◽  
Strontium Ion

Effect of the synthesis temperature of sodium nonatitanate on batch kinetics of strontium-ion adsorption from aqueous solution

Adsorption ◽  
2011 ◽  
Vol 17 (6) ◽  
pp. 967-975 ◽  
Author(s):  
Aurélie Merceille ◽  
Evelyne Weinzaepfel ◽  
Yves Barré ◽  
Agnès Grandjean
Keyword(s):  
Aqueous Solution ◽  
Synthesis Temperature ◽  
Ion Adsorption ◽  
Batch Kinetics ◽  
Sodium Nonatitanate ◽  
Kinetics Of ◽  
Strontium Ion

Synthesis of SBA-15 encapsulated ammonium molybdophosphate using Qaidam natural clay and its use in cesium ion adsorption

RSC Advances ◽  
2015 ◽  
Vol 5 (45) ◽  
pp. 35453-35460 ◽  
Author(s):  
Chunyan Sun ◽  
Feng Zhang ◽  
Shengfang Li ◽  
Fangqin Cheng
Keyword(s):  
Mesoporous Silica ◽  
Qaidam Basin ◽  
Synthesis Method ◽  
Low Grade ◽  
Ion Adsorption ◽  
Natural Clay ◽  
One Pot ◽  
Hexagonal Mesoporous Silica ◽  
Ammonium Molybdophosphate ◽  
Cesium Ion

The ordered hexagonal mesoporous silica (SBA-15) encapsulated ammonium molybdophosphate (AMP) was successfully synthesized using low-grade natural clay from Qaidam Basin as silica and aluminum source, through a one-pot synthesis method.

Kinetics of plutonium and americium sorption to natural clay

2012 ◽  
Vol 108 ◽  
pp. 41-49 ◽  
Author(s):  
Galina Lujanienė ◽  
Petr Beneš ◽  
Karel Štamberg ◽  
Tomas Ščiglo
Keyword(s):  
Natural Clay ◽  
Kinetics Of

scholarly journals Adsorption of uranyl ion on acid-modified zeolitic mineral clinoptilolite

2009 ◽  
Vol 63 (5) ◽  
pp. 407-414 ◽  
Author(s):  
Srdjan Matijasevic ◽  
Aleksandra Dakovic ◽  
Deana Iles ◽  
Sonja Milicevic
Keyword(s):  
Solid Phase ◽  
Exchange Capacity ◽  
Uranyl Ion ◽  
Ion Adsorption ◽  
Fluorometric Method ◽  
Kinetics Of Adsorption ◽  
Ph Values ◽  
Modified Clinoptilolite ◽  
Kinetics Of

In this paper, the results of adsorption of uranyl ion on acid-modified zeolitic mineral clinoptilolite are presented. Adsorption was investigated at different amounts of solid phase in suspension, as well as at different pH values. The modified clinoptilolite samples were obtained by treatment of clinoptilolite with acids: hydrochloric, oxalyc and citric. Starting and modified clinoptilolites were characterized by chemical analysis, thermal (DT/TG) analysis and by determination of cation exchange capacity, while starting and nonadsorbed amounts of uranyl ion were determined by fluorometric method. Uranyl ion adsorption experiments on natural unmodified zeolitic mineral showed that uranyl ion adsorption was low (29.2%) and that treatment of clinoptilolite with acids significantly increases the adsorption of uranyl ion (>90%). In the case of acid treated clinoptilolites, the highest adsorption of uranyl ion was achieved on clinoptilolite modified with hydrochloric acid. Kinetics of adsorption showed that adsorption of uranyl ion begins very fast and that the most of uranyl ion was adsorbed in first 30 min. Practically, there were no changes in uranyl ion adsorption within next 72 h.

Kinetic study of the pyrolysis of polypropylene over natural clay

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Jan Nisar ◽  
Yousaf Khan ◽  
Ghulam Ali ◽  
Afzal Shah ◽  
Zahoor H. Farooqi ◽  
...  
Keyword(s):  
Activation Energy ◽  
Decomposition Reaction ◽  
Plastic Waste ◽  
Pyrolysis Oil ◽  
Natural Clay ◽  
Efficient Catalyst ◽  
Thermogravimetric Data ◽  
Potential Applications ◽  
High Fraction ◽  
Kinetics Of

Abstract Clay is widely used in numerous industrial activities; however, its application as an efficient catalyst for the decomposition of plastic waste on a commercial scale is scanty. Therefore, in this study, we have made efforts to use natural clay as the catalyst for the thermal decomposition of polypropylene in a pyrolysis setup. The pyrolysis oil obtained was found rich in hydrocarbons ranging from C8–C35. Kinetics of the pyrolysis reaction was determined utilizing thermogravimetric data and the activation energy (E) and A-factor were observed as 70.33–94.80 kJ/mol and 6 × 105–2.3 × 108 min−1 using the Ozawa-Flynn-Wall method and 58.19–74.82 kJ/mol and 4.1 × 102–4.2 × 103 min−1 applying Tang Wanjun equation. The activation energy was found to increase with enhancement in conversion presenting a complex decomposition reaction. Comparing the activation energy determined in this work with previous studies confirmed that natural clay has reduced E of decomposition reaction at high fraction conversion. The pyrolysis results supported with the kinetic investigation in this work would have potential applications in disposing of plastic waste on an industrial scale and a step forward in the field of waste management.

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