Valorization of raw biomaterial waste-date stones-for Cr (VI) adsorption in aqueous solution: Thermodynamics, kinetics and regeneration studies

Khelaifia, Fatma Zohra; Hazourli, Sabir; Nouacer, Sana; Rahima, Hachani; Ziati, Mounir

doi:10.1016/j.ibiod.2016.06.002

Cited by 57 publications

(23 citation statements)

References 44 publications

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“…Before each test, it is necessary to be careful to put the material in the etuve until constant weight then in the desiccator. The physico-chemical and structural properties of RDP can be found in our article (Khelaifia et al, 2016). The major characteristics are: a surface area ¼ 1.2 m 2 g À1 , total pore volume ¼ 0.02 cm 3 g À1 and point of zero charge ¼ 5.10.…”

Section: Methodsmentioning

confidence: 99%

Performance Study of a Low‐cost Adsorbent—Raw Date Pits—for Removal of Azo Dye in Aqueous Solution

Rahima

Hazourli

Nouacer

et al. 2017

Water Environment Research

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The feasibility of using natural waste (raw date pits) as a low-cost adsorbent for the adsorption of an anionic dye (Congo red) from aqueous solution has been investigated. Adsorption optimized conditions were obtained at low dose 1 g/L, initial dye concentration 100 mg/L, pH 2, equilibrium contact time 120 min, and temperature 20 °C. The corresponding adsorption capacity was around 70 mg/g and could reach 150 mg/g by increasing the ionic strength of the dye solution (0.05 M CaCl2). These results are well modeled by Freundlich isotherm and kinetics study followed by pseudo second-order model. Thermodynamic parameters indicate that the adsorption process is endothermic and not spontaneous. The tests of desorption-regeneration showed that the studied adsorbent has the disadvantage of the loss of efficiency at its reuse but this is offset by its abundance. Based on these results, it can be used as competitive material for the removal of dyes.

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Section: Methodsmentioning

confidence: 99%

Performance Study of a Low‐cost Adsorbent—Raw Date Pits—for Removal of Azo Dye in Aqueous Solution

Rahima

Hazourli

Nouacer

et al. 2017

Water Environment Research

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“…The values of ∆G • , ∆H • , and ∆S • are summarized in Table 5. The negative values of ∆G • indicate that the As and Pb adsorption process was spontaneous and favorable with increasing temperature [30]. The negative values of ∆H • show that the adsorption process was exothermic for As and Pb adsorption onto SP and CSP.…”

Section: As and Pb Adsorption Onto Sp And Cspmentioning

confidence: 99%

Adsorption of Arsenic and Lead onto Stone Powder and Chitosan-Coated Stone Powder

Jung

Bak

et al. 2019

Processes

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Stone powder (SP) produced from masonry mills has been treated as a specific waste and rarely used for environmental purposes. In this study, we tested its potential as an adsorbent to remove arsenic (As) and lead (Pb) from water. The single-solute sorption isotherms for As(V) and Pb(II) onto SP and chitosan-coated SP (CSP) were investigated. Several sorption models, such as the Langmuir, Freundlich, and Dubinin–Radushkevich (DR) models, were used to analyze the adsorption features. The results demonstrated that As and Pb were successfully adsorbed onto SP and CSP, indicating that SP and CSP had potential as adsorbents of As and Pb. The maximum adsorption capacities of SP and CSP for Pb were 22.8 and 54.5 times higher than those for As, respectively. Chitosan coating increased the adsorption potential in Pb adsorption by 5% but decreased it in As adsorption. The adsorption potential also depended on the pH and temperature. The adsorption amount of As increased with pH but that of Pb decreased as pH increased. In addition, the ln b in the Langmuir model increased with 1/T (K), indicating that the adsorption of As and Pb occurred exothermically and spontaneously.

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“…This observation is similar to previous reports on the BET surface area of lignocellulosic adsorbents that are of agricultural origin. The BET surface area of 1.2 m 2 •g −1 and total pore volume of 0.02 cm 3 •g −1 of a date stone adsorbent has been reported by Khelaifia et al [76] in their study of the valorization biomaterial for Cr(VI) adsorption. In another study reported by Setiabudi et al [77], BET surface area and total pore volume of 2.59 m 2 •g −1 and 2.0 × 10 −3 cm 3 •g −1 were obtained for an agricultural residue-Elaeis guineesis leaves used for the adsorption of methylene blue.…”

Section: Bet Surface Area and Porositymentioning

confidence: 66%

Evaluation of Cd(II) Ion Removal from Aqueous Solution by a Low-Cost Adsorbent Prepared from White Yam (Dioscorea rotundata) Waste Using Batch Sorption

2018

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An agricultural residue, white yam (Dioscorea rotundata) tuber peel (YTBS), was used for the removal of Cd(II) ion from an aqueous solution using a batch method. The adsorbent was characterized using FTIR, TGA, SEM, EDX, N2 BET, XRD, and XRF. The optimization of sorption variables such as pH, contact time, adsorbent dose, and initial metal ion concentration at 25 °C were also carried out. The results indicated the dependence of sorption on the adsorbate pH and adsorbent dose, while the adsorption system reached equilibrium in 180 min. The sorption kinetics was fitted to three models (pseudo first order, pseudo second order, and Elovich) to validate the kinetics, and the pseudo first order was the best model for the description of Cd(II) uptake. Equilibrium isotherm modelling was also carried out using the Langmuir, Freundlich, and Temkin models, with the Langmuir isotherm giving the best fitting to the experimental results. The maximum loading capacity (qmax) of the adsorbent for Cd(II) obtained from the Langmuir isotherm model was 22.4 mg∙g−1 with an isotherm constant (KL) of 3.46 × 10−3 L·mg−1 and r2 value of 0.99. This result indicates that the YTBS residue was a good adsorbent for the removal of Cd(II) ion from aqueous system.

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Valorization of raw biomaterial waste-date stones-for Cr (VI) adsorption in aqueous solution: Thermodynamics, kinetics and regeneration studies

Cited by 57 publications

References 44 publications

Performance Study of a Low‐cost Adsorbent—Raw Date Pits—for Removal of Azo Dye in Aqueous Solution

Performance Study of a Low‐cost Adsorbent—Raw Date Pits—for Removal of Azo Dye in Aqueous Solution

Adsorption of Arsenic and Lead onto Stone Powder and Chitosan-Coated Stone Powder

Evaluation of Cd(II) Ion Removal from Aqueous Solution by a Low-Cost Adsorbent Prepared from White Yam (Dioscorea rotundata) Waste Using Batch Sorption

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