Copper, zinc, cadmium and lead biosorption by Gymnogongrus torulosus. Thermodynamics and kinetics studies

Areco, María Mar; Afonso, Marı́a dos Santos

doi:10.1016/j.colsurfb.2010.08.014

Cited by 126 publications

(44 citation statements)

References 47 publications

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“…, and c) As(V). pH is one the most important mechanisms governing adsorption processes [51]. Higher uptake at relatively low acid conditions confirms the interference of H + ions and increased electrostatic repulsive interactions, resulting in the lowest adsorption at high pH values [52][53].…”

Section: Effects Of Solution Phmentioning

confidence: 96%

Absorption Behaviours of Copper, Lead, and Arsenic in Aqueous Solution Using Date Palm Fibres and Orange Peel: Kinetics and Thermodynamics

Amin¹,

Alazba²,

Amin³

2017

Pol. J. Environ. Stud.

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In this study, date palm fibres and orange peel in both individual and hybrid forms were studied for the removal of copper, lead, and arsenic. Equilibrium was achieved after 150 minutes, and the highest and the lowest removal efficiencies were for Cu +2 and As(V), respectively. A slightly higher removal efficiency of metal ions using orange peel was observed, which could be due to the greater number of functional groups on the chemically pre-treated adsorbent. The highest removal was observed at pH 6, and the adsorption data exhibited a linear increase in metal removal capacity with increasing adsorbent concentrations from 0.1 to 2 g/L. A significantly higher removal efficiency was observed for a 45 µm particle size compared to larger particle sizes. Additionally, a 30-40% decrease in removal efficiencies was observed for all three heavy metal ions when using the date palm fibres or the hybrid adsorbent when the initial metal concentrations were increased from 20 to 80 mg/L. The Freundlich model agreed with the experimental data slightly better than the Langmuir model for both date palm fibres and the hybrid adsorbent. A pseudo second-order kinetic model better described the kinetic behaviour of As(V) adsorption on the investigated adsorbents. Date palm fibres exhibited exothermic adsorption, while both orange peel and the hybrid adsorbent displayed exothermic and endothermic reactions. Increased randomness at the solid-liquid interface was observed for all adsorbents, and the Gibbs free energy change values were negative, confirming the spontaneous nature of adsorption, which proceeded in the forward direction.

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Section: Effects Of Solution Phmentioning

confidence: 96%

Absorption Behaviours of Copper, Lead, and Arsenic in Aqueous Solution Using Date Palm Fibres and Orange Peel: Kinetics and Thermodynamics

Amin¹,

Alazba²,

Amin³

2017

Pol. J. Environ. Stud.

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“…Moreover, at higher temperatures the surface activity of the biomass decreases [103] [104], even there is a possibility of damaging the surface active sites which reduces the sorption ability of the materials [105]. Eventually, the loss in the adsorption capacity is caused by the change in the texture of the sorbent and as a result of the material deterioration [106].…”

Section: T ( K )mentioning

confidence: 99%

Sesame Husk as Adsorbent for Copper(II) Ions Removal from Aqueous Solution

El-Araby¹,

Ibrahim²,

Mangood³

et al. 2017

GEP

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In this study, the adsorption behavior of copper(II) ions from aqueous solutions onto sesame husk (SH) was investigated. The effect of different parameters such as pH, contact time, adsorbent dosage, adsorbate concentration, temperature and agitation speed was studied. Thermodynamic parameters, equilibrium isotherms and kinetic data have been evaluated. The functional groups and surface morphology of SH adsorbent were characterized by FTIR and SEM. Adsorption equilibrium isotherms were expressed by Langmuir, Freundlich and Dubinin-Radushkevich (D-R) adsorption models and it was found that Langmuir adsorption model fits the experimental data better than Freundlich and D-R models. The adsorption can be best described by the pseudo second-order kinetic model.

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“…The pH has a large impact in governing the mechanism of the adsorption process (Areco & Dos Santos Afonso 2010). In most previous studies, efficient adsorption takes place at acidic pH (Table 6), although it depends upon the nature of the adsorbate and adsorbent.…”

Section: Effects Of the Solution Phmentioning

confidence: 99%

Removal of Heavy Metals from Wastewater using Date Palm as a Biosorbent: A Comparative Review

Shafiq¹,

Alazba²,

Amin³

2018

JSM

106

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Copper, zinc, cadmium and lead biosorption by Gymnogongrus torulosus. Thermodynamics and kinetics studies

Cited by 126 publications

References 47 publications

Absorption Behaviours of Copper, Lead, and Arsenic in Aqueous Solution Using Date Palm Fibres and Orange Peel: Kinetics and Thermodynamics

Absorption Behaviours of Copper, Lead, and Arsenic in Aqueous Solution Using Date Palm Fibres and Orange Peel: Kinetics and Thermodynamics

Sesame Husk as Adsorbent for Copper(II) Ions Removal from Aqueous Solution

Removal of Heavy Metals from Wastewater using Date Palm as a Biosorbent: A Comparative Review

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