Interaction between Chitosan and Uranyl Ions. Role of Physical and Physicochemical Parameters on the Kinetics of Sorption

Piron, Estelle; Accominotti, M.; Domard, Alain

doi:10.1021/la960765d

Cited by 138 publications

(105 citation statements)

References 25 publications

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“…Both biopolymers are chemically similar to cellulose, differing only from the R group attached to carbon 2 of the general carbohydrate structure. Thus, N-acetyl (NHCOCH 3 ) groups are disposed in chitin, amine (NH 2 ) groups in chitosan, and hydroxyl (OH) groups in cellulose. The repeating unit of this structure is exhibited below.…”

Section: Introductionmentioning

confidence: 99%

Some Thermodynamic Data on Copper–Chitin and Copper–Chitosan Biopolymer Interactions

Monteiro

Airoldi

1999

Journal of Colloid and Interface Science

196

112

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Section: Introductionmentioning

confidence: 99%

Some Thermodynamic Data on Copper–Chitin and Copper–Chitosan Biopolymer Interactions

Monteiro

Airoldi

1999

Journal of Colloid and Interface Science

196

112

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“…According to Piron and Domard (1997), who studied the uranium adsorption into different types of chitosans, the adsorption capacity increases with the average degree of acetylation (DA). The DA measures the percentage of amino groups available in the chitosan chain and is one of the main parameters that affect the adsorption properties.…”

Section: Adsorption Of Metals Onto the Biosurfactantmentioning

confidence: 99%

Adsorption of copper, zinc and lead on biosurfactant produced from cassava wastewater

Kummer¹,

Cosmann²,

Pastore³

et al. 2016

Afr. J. Biotechnol.

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The remediation of soils contaminated by hydrophobic compounds, especially petroleum derivatives, using surfactants has been fairly studied. The use of these compounds in heavy metal contaminated areas is incipient and their mechanism of action has not been totally elucidated yet. The biosurfactants are compounds with surfactant characteristics produced by living organisms and have several environmental advantages, like greater biodegradability and production from renewable sources. The aim of this study was to evaluate the adsorption potential of the metals copper, zinc and lead onto the biosurfactant structure and to relate it to the Langmuir and Freündlich physicochemical models of adsorption. The biosurfactant produced presented an emulsification index (EI) around 60%, which was stable even after 72 h of emulsion formation. The analysis of FTIR and HPLC confirmed that the biosurfactant produced is composed mainly of surfactin, found in concentration of 28%. The biosurfactant was capable of adsorbing the metals in its structure. In the adsorption process of Pb 2+ , the biosurfactant was considered as an interesting adsorbent, but this behavior did not adjust satisfactorily to Langmuir and Freündlich models. Thus, the biosurfactant has the potential to be utilized in remediation processes of soils and treatment of effluents contaminated by heavy metals.

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“…Chitosan has been broadly used for the sorption of heavy metal ions (Coughlin and Deshaies et al, 1990;Udaybhaskar and Iyengar et al, 1990;Jansson and Guibal et al, 1996). Further physical and chemical modifications of chitosan have been made to improve the selectivity and the capacity for metals ions (Kumar and Majeti, 2000;Guibal and Jansson et al, 1995;Piron and Accominoti et al, 1997;Choong and Wolfgang, 2003). Chitosan is also characterized by weak diffusion properties: long contact times are required to reach equilibrium.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of nuclease p1 on chitosan nano-particles

Shi

Tang

2009

Braz. J. Chem. Eng.

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-The sorption of nuclease P1 onto chitosan nano-particles is studied in this paper. The effect of some adsorption kinetics factors such as nuclease P1 concentration, chitosan nano-particles solution concentration, adsorption temperature, chitosan nano-particles size, solution pH, etc. is investigated. Adsorption of nuclease P1 onto chitosan nano-particles is fitted into Lagergren first-order equation at initial nuclease P1 concentration of 3.0 mg/mL. The first-order constant for nuclease P1 is 22.98 h -1 . When nuclease P1 concentration is controlled into certain region, the adsorption fits into Freundlich isothermal linear equation. A mechanism of adsorption for nuclease P1 is proposed by analyzing IR spectra. The IR spectra shows that the hydrogen bond might be the main force between the hydroxyl group, the NH 2 group and the nuclease P1.

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Interaction between Chitosan and Uranyl Ions. Role of Physical and Physicochemical Parameters on the Kinetics of Sorption

Cited by 138 publications

References 25 publications

Some Thermodynamic Data on Copper–Chitin and Copper–Chitosan Biopolymer Interactions

Some Thermodynamic Data on Copper–Chitin and Copper–Chitosan Biopolymer Interactions

Adsorption of copper, zinc and lead on biosurfactant produced from cassava wastewater

Adsorption of nuclease p1 on chitosan nano-particles

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