Application of insoluble cellulose xanthate for the removal of heavy metals from aqueous solution

Kim, Hyong-Tae; Lee, Kisay

doi:10.1007/bf02707116

Cited by 26 publications

(12 citation statements)

References 12 publications

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“…However, complex formation occurs between four sulfur atoms and one divalent metal ion (Scheme 1). It is postulated that Pb 2+ adsorption process could undergo both ion exchange and complex formation [9,35]. Because lead belongs to transition metals, which have empty orbitals that can be occupied by electrons to form complex, and considering steric hindrance, mechanism (b) is the most possible adsorption process.…”

Section: Mechanism Of Adsorptionmentioning

confidence: 99%

“…6 shows the application of pseudo-second-order model for both temperatures. Obviously, the adsorption process could be well described by the pseudo-secondorder equation, indicating the process mechanism to be chemical adsorption [34].…”

Section: Adsorbent Langmuirmentioning

confidence: 99%

“…Some sulfur-bearing compounds include sulfides, thiols, dithiocarbamates, dithiophosphates and xanthates. Xanthates are most prominent because they are easy to prepare with relatively inexpensive reagents, highly insoluble and have high stability constant values of the metal complexes formed [9]. According to HSAB (hard and soft acids and bases) classification system, sulfur can be considered as a soft ligand group having strong * Corresponding author.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Application of orange peel xanthate for the adsorption of Pb2+ from aqueous solutions

Liang

Guo

Feng

et al. 2009

Journal of Hazardous Materials

158

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Section: Mechanism Of Adsorptionmentioning

confidence: 99%

Section: Adsorbent Langmuirmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Application of orange peel xanthate for the adsorption of Pb2+ from aqueous solutions

Liang

Guo

Feng

et al. 2009

Journal of Hazardous Materials

158

View full text Add to dashboard Cite

“…There are a number of derivatizing solvents (able to dissolve cellulose with substitution, forming new covalent bonds) e.g., trifluoroacetic acid (TFA) [73], sodium hydroxide/carbon disulfide (NaOH/CS 2 ) [74], and N,N-dimethylformamide/dinitrogen tetroxide [75].…”

Section: Mechanism Of Cellulose Dissolutionmentioning

confidence: 99%

Ionic Liquid as Reaction Media for the Production of Cellulose-Derived Polymers from Cellulosic Biomass

et al. 2017

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Abstract:The most frequent polymer on nature is cellulose that is present together with lignin and hemicellulose in vegetal biomass. Cellulose can be, in the future, sustainable raw matter for chemicals, fuels, and materials. Nevertheless, only 0.3% of cellulose is processed nowadays due to the difficulty in dissolving it, and only a small proportion is used for the production of synthetic cellulosic fibers especially esters and other cellulose derivatives, normally in extremely polluting processes. The efficient and clean dissolution of cellulose is a major objective in cellulose research and development. Ionic liquids (ILs) are considered "green" solvents due to their low vapor pressure, that prevents them evaporating into the atmosphere. In addition, these molten salts present advantages in process intensification, leading to more than 70 patents in lignocellulosic biomass in ILs being published since 2005, most of them related to the production of cellulose derived polymers, e.g., acetates, benzoylates, sulfates, fuorates, phthalates, succinates, tritylates, or silylates. In this work, the use of ILs for production of cellulose derived polymers is thoroughly studied. To do so, in the first place, a brief summary of the state of the art in cellulose derivatives production is presented, as well as the main features of ILs in cellulose processing applications. Later, the main results in the production of cellulose derivatives using ILs are presented, followed by an analysis of the industrial viability of the process, considering aspects such as environmental concerns and ILs' recyclability.

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“…The pseudo-second-order equation [19], based on adsorption capacity at equilibrium, can be expressed as:…”

Section: /2303) T (3)mentioning

confidence: 99%

Adsorption Studies of Pb (Ii) From Aqueous Solution by Using Modified Date Palm Trunk.

Pandey¹,

Tiwari.²,

Sharma³

et al. 2017

IJAR

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Ethylenediamine modified date palm trunk an attractive approach for improvement of lead (II) uptake from aqueous solutions. Factors influencing Pb(II) adsorption onto MDPT such as initial Pb (II) concentration, pH, contact time, and adsorbent dosage were investigated. The adsorption equilibrium was established within 120 min. Before and after adsorption, MDPT was characterized by Fourier transform infrared spectroscopy (FTIR). The results showed that the pseudo-second order model fits the experimental data very well. The equilibrium data have been analysed using Langmuir and Freundlich isotherm models. The recovery of Pb(II) adsorbed on MDPT was found 98.5% using 0.2 M HCl. Desorption experiments showed the feasibility of the regeneration of MDPT.

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Application of insoluble cellulose xanthate for the removal of heavy metals from aqueous solution

Cited by 26 publications

References 12 publications

Application of orange peel xanthate for the adsorption of Pb2+ from aqueous solutions

Application of orange peel xanthate for the adsorption of Pb2+ from aqueous solutions

Ionic Liquid as Reaction Media for the Production of Cellulose-Derived Polymers from Cellulosic Biomass

Adsorption Studies of Pb (Ii) From Aqueous Solution by Using Modified Date Palm Trunk.

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