Biosorption potential of the mediterranean plant (Posidonia oceanica) for the removal of Cu2+ ions from aqueous media : Equilibrium, kinetic, thermodynamic and mechanism analysis

Hannachi, Yasser; Rezgui, Amina; Boubaker, Taoufik

doi:10.1007/s11814-014-0054-y

Cited by 20 publications

(26 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The peak at 1600 cm −1 could be attributed to N-H bending, while those at 1407 and 1027 cm −1 are assigned to -CN stretching. Similar results are reported on the copper removal by P. oceanica (Hannachi et al 2014).…”

Section: Characterization Of Biosorbentsupporting

confidence: 89%

Kinetic and equilibrium studies of biosorption of M(II) (M = Cu, Pb, Ni, Zn and Cd) onto seaweed Posidonia oceanica fibers

Boulaiche¹,

Belhamdi²,

Hamdi³

et al. 2019

Appl Water Sci

View full text Add to dashboard Cite

This work reports the application of Posidonia oceanica for the elimination of heavy metals M(II) (M = Zn, Cd, Ni, Cu and Pb) by biosorption in batch system. The effect of the contact time, initial M concentration, pH and temperature was considered. The kinetic and equilibrium models for the M-biosorption were tested namely the pseudo-first-order, pseudo-secondorder and Elovich kinetic models. Langmuir, Freundlich, Temkin and Dubinin-Radushkevich isotherms models have also been used to fit equilibrium adsorption data. The adsorption kinetics follow a pseudo-second-order model for all studied systems, and the equilibrium data are suitably fitted by the above models. The amount of adsorbed metals by biosorption is 48.33, 43.9, 41.02, 37.90 and 30.22 mg/g for Pb(II), Cu(II), Ni(II), Zn(II) and Cd(II), respectively. The thermodynamic parameters suggested that the metal biosorption is spontaneous with an endothermic nature.

show abstract

Section: Characterization Of Biosorbentsupporting

confidence: 89%

Kinetic and equilibrium studies of biosorption of M(II) (M = Cu, Pb, Ni, Zn and Cd) onto seaweed Posidonia oceanica fibers

Boulaiche¹,

Belhamdi²,

Hamdi³

et al. 2019

Appl Water Sci

View full text Add to dashboard Cite

show abstract

“…At initial contact time the strong concentration gradient leads to a fast sorption rate: the sorption efficiency reaches about 50–55 % within the first 10 min. With the decrease in the residual concentration, the concentration gradient decreases and the sorption rate progressively decreases . At equilibrium the sorption efficiency ranges between 70 and 80 % (depending on temperature).…”

Section: Resultsmentioning

confidence: 99%

“…With the decrease in the residual concentration, the concentration gradient decreases and the sorption rate progressively decreases. [18] At equilibrium the sorption efficiency ranges between 70 and 80 % (depending on temperature). This means that about 60-70 % of total sorption occurs within the first 10 min of contact.…”

Section: Kinetic Investigationsmentioning

confidence: 99%

Sorption of Hg(II) and Zn(II) ions using lignocellulosic sorbent (date pits)

2017

Self Cite

View full text Add to dashboard Cite

This work focuses on the study of Hg(II) and Zn(II) sorption using pristine date pits. The effect of pH is evaluated before considering the influence of both temperature and contact time on sorption efficiency. Sorption isotherms are also determined and modelled using conventional models such as Langmuir, Freundlich, and Dubinin‐Radushkevich (D‐R) equations. The best fit was obtained with the Langmuir equation and maximum sorption capacities reached 38.5 and 52.6 mg · g−1, for Hg(II) and Zn(II), respectively. An analysis of the temperature effect by the Gibbs equation showed that the sorption is exothermic and spontaneous. The mean free energy of sorption (obtained from D‐R equation) confirms that metal binding occurs through a chemical ion‐exchange mechanism. The kinetic profiles can be accurately fitted with the pseudo‐second order rate equation. Complementary analyses (using FTIR spectrometry and SEM‐EDX analysis) confirm that ion‐exchange is the main binding mechanism, though a contribution of surface complexation cannot be neglected.

show abstract

“…The Dubinin-Radushkevich (D-R) model is a semi-hypothetical equation which is by and large allied to a sorption induced by a pore padding mechanism. This model gives valuable information on the nature of the adsorption process (chemisorption or physisorption) [33]. The linear presentation of the D-R isotherm equation [34] is granted as Eq.…”

Section: Intra-particle Diffusion Adsorption Rate Constants Of Metal mentioning

confidence: 99%

Bi-Functionalized Hybrid Materials as Novel Adsorbents for Heavy Metal Removal from Aqueous Solution: Batch and Fixed-Bed Techniques

Hannachi¹,

Hafidh²,

Ayed³

2020

Water Chemistry

Self Cite

View full text Add to dashboard Cite

In this study, two new mesoporous hybrid gels were synthesized. The structural order, morphology, and textural properties of the prepared hybrid materials have been studied by 13 C CP MAS NMR, SEM, FTIR, and nitrogen adsorption-desorption analysis. The application for the heavy metal uptake from aqueous solution using the as-synthesized hybrid materials as an adsorbent is explored. Operating parameters influencing the adsorption procedure, for instance, solution pH, contact time, and temperature are contemplated. In order to gain an insight into the adsorption mechanism and reveal the rate-controlling steps, three models pseudo-first-order, pseudo-second-order, and intra-particle diffusion have been studied to fit. Langmuir, Freundlich, and Dubinin-Radushkevich (D-R) models are assigned to portray the adsorption isotherms. Besides, the feasibility of the synthesized adsorbents for a continuous process in fixed-bed column was investigated. Prior tests produced on electroplating effluents reveal that the as-prepared xerogel could be strongly used for the heavy metal uptake from real wastewater.

show abstract

Biosorption potential of the mediterranean plant (Posidonia oceanica) for the removal of Cu2+ ions from aqueous media : Equilibrium, kinetic, thermodynamic and mechanism analysis

Cited by 20 publications

References 25 publications

Kinetic and equilibrium studies of biosorption of M(II) (M = Cu, Pb, Ni, Zn and Cd) onto seaweed Posidonia oceanica fibers

Kinetic and equilibrium studies of biosorption of M(II) (M = Cu, Pb, Ni, Zn and Cd) onto seaweed Posidonia oceanica fibers

Sorption of Hg(II) and Zn(II) ions using lignocellulosic sorbent (date pits)

Bi-Functionalized Hybrid Materials as Novel Adsorbents for Heavy Metal Removal from Aqueous Solution: Batch and Fixed-Bed Techniques

Contact Info

Product

Resources

About