Adsorption of Pd(II) complexes from chloride solutions obtained by leaching chlorinated spent automotive catalysts on ion exchange resin Diaion WA21J

Shen, Shaobo; Pan, Tonglin; Liu, Xinqiang; Yuan, Liangjie; Zhang, Yongjian; Wang, Jinchao; Guo, Zhanchen

doi:10.1016/j.jcis.2010.01.049

Cited by 58 publications

(30 citation statements)

References 15 publications

(19 reference statements)

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“…The types of adsorption processes can be estimated by the ranges of E, and the E values of physical and ion-exchange adsorption are below 8 kJ mol −1 and among 8~16 kJ mol −1 , respectively [31,32].…”

Section: Adsorption Isotherm Modelsmentioning

confidence: 99%

Removal of Methylene Blue from Aqueous Solution by Bone Char

et al. 2018

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Bone char was prepared from bovine bone for the removal of methylene blue from aqueous solution. The effects of particle size, contact time, and adsorption temperature on the removal rate of methylene blue were investigated. It was found that bone char particle size had an insignificant effect. The equilibration time was found at approximately 80 min. The removal rate decreased with an increase in temperature. The intraparticle diffusion was the main rate-limiting step. The experimental data was analyzed by kinetic, isotherm, and thermodynamic equations. The results show that the pseudo-second-order kinetic model and Freundlich, Temkin, and Dubinin–Kaganer–Radushkevich isotherm models are true of the adsorption process. The spontaneous and exothermic ion-exchange adsorption process was certified by the negative values of free energy change and enthalpy change, and 13.29 kJ mol−1 of adsorption energy.

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Section: Adsorption Isotherm Modelsmentioning

confidence: 99%

Removal of Methylene Blue from Aqueous Solution by Bone Char

et al. 2018

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“…As it is well known, the heat of adsorption in physisorption process is normally lower than 80 kJ/mol while in chemisorption higher than this limit [4,5]. Concerning the adsorption energy, if below 8 kJ/mol the phenomenon is defi ned as physical adsorption, if between 8−16 kJ/ mol as ion exchange and if over 16 kJ/mol as chemical adsorption [6]. Furthermore, in physisorption process the activation energy is lower than 40 kJ/mol, while in chemisorption higher than this limit [7,8].…”

Section: Introductionmentioning

confidence: 99%

Heat of adsorption, adsorption energy and activation energy in adsorption and ion exchange systems

Inglezakis¹,

Zorpas

2012

Desalination and Water Treatment

155

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A B S T R AC TThe heat of adsorption, the adsorption energy and the activation energy are of the most important and frequently calculated parameters in adsorption and ion exchange systems. However, in many occasions these parameters are not clearly defi ned, appropriate calculated or analyzed in the related literature. A characteristic example is the use of different limits used in order to identify a process as physisorption, chemisorption or ion exchange. The present paper aims at clarifying the nature of these parameters and their interrelationship in theoretical basis and to present the paradigm of ion exchange systems involving zeolites and cations as a case study. All basic theoretical issues are presented, analyzed and discussed with the support of a large number of experimental data in order to draw secure conclusions on several critical issues. In total 46 activation energy, 32 adsorption energy and 34 heat of adsorption experimental values are collected and discussed.

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“…Recently, much attention has been paid on the development of an efficient treating process for industrial wastes because they have a probability of destroying the global environment [1,2]. Palladium, one of the precious group metals (PGMs) is a major pollutant from the chemical industry which utilizes palladium as catalysts as well as electrical and corrosion resistant materials.…”

Section: Introductionmentioning

confidence: 99%

Extraction of Palladium from Acidic Chloride Media into Emulsion Liquid Membranes using LIX 984N-C<sup>®</sup>

Praipruke¹,

Kriausakul²,

Tantayanon³

2012

IJNM

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The extraction of palladium from hydrochloric acid solutions into emulsion liquid membranes (ELMs) using LIX 984N-C as the extractant was investigated. The influential factors and the total capacities of palladium extraction were determined by a batch method. The behavior of palladium extraction by ELMs under the operational conditions-pH of the external feed phase, surfactant and extractant concentration, internal stripping phase concentration, treat ratio and agitation speed were reported. Using LIX 984N-C, palladium was effectively extracted from the external acidic chloride feed phase into the internal receiving phase of W/O emulsions. More than 92% of palladium could be extracted at a feed pH of 2 with 3% Span 80, 9% LIX 984N-C and 7M HCl at a stirring speed of 300 rpm.

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Adsorption of Pd(II) complexes from chloride solutions obtained by leaching chlorinated spent automotive catalysts on ion exchange resin Diaion WA21J

Cited by 58 publications

References 15 publications

Removal of Methylene Blue from Aqueous Solution by Bone Char

Removal of Methylene Blue from Aqueous Solution by Bone Char

Heat of adsorption, adsorption energy and activation energy in adsorption and ion exchange systems

Extraction of Palladium from Acidic Chloride Media into Emulsion Liquid Membranes using LIX 984N-C<sup>®</sup>

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Adsorption of Pd(II) complexes from chloride solutions obtained by leaching chlorinated spent automotive catalysts on ion exchange resin Diaion WA21J

Cited by 58 publications

References 15 publications

Removal of Methylene Blue from Aqueous Solution by Bone Char

Removal of Methylene Blue from Aqueous Solution by Bone Char

Heat of adsorption, adsorption energy and activation energy in adsorption and ion exchange systems

Extraction of Palladium from Acidic Chloride Media into Emulsion Liquid Membranes using LIX 984N-C&lt;sup&gt;&#174;&lt;/sup&gt;

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Product

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Extraction of Palladium from Acidic Chloride Media into Emulsion Liquid Membranes using LIX 984N-C<sup>®</sup>