The adsorption kinetics and modeling for heavy metals removal from wastewater by Moringa pods

Matouq, Mohammed; Jildeh, Nina; Qtaishat, M.; Hindiyeh, Muna; Syouf, Maha Q. Al

doi:10.1016/j.jece.2015.03.027

Cited by 236 publications

(97 citation statements)

References 28 publications

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“…Naturally, temperature increases the kinetic energy of the ions and molecules in solution, which has an adverse effect on the adsorption. Similar accounts were given by Matouq et al (2015) for the sorption of nickel onto moringa pods, and by Hannachi et al (2014) for the adsorption of nitrate ions onto a membrane. …”

Section: Effect Of Temperature On Adsorptionmentioning

confidence: 76%

“…This led to supersaturation of the active sites available for adsorption. Matouq et al (2015) and Khelifi et al (2016) similarly reported that as the initial concentration for metal ions increases, the removal percentage decreases for a fixed adsorbent dose and contact time. This behavior was also explained by the limited active site on the adsorbent surface.…”

Section: Effect Of Adsorbate Concentration On Adsorptionmentioning

confidence: 96%

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Adsorption of Nickel(II) Ions from Aqueous Solution using Banana Peel and Coconut Shell

Olufemi¹,

Eniodunmo²

2018

IJTech

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This work investigates the comparative adsorptive removal of Ni (II) ions from aqueous solution using coconut shell and banana peel. Optimum conditions for adsorption were determined by experimental design, while Analysis of Variance (ANOVA) and BonferroniHolm Posthoc significance statistical tests on operational parameters were also conducted. The parametric effect of adsorbate dose, adsorbent dose, pH, contact time, particle size and temperature were varied individually, and their effect on the percentage of Ni (II) ion removal was estimated. The maximum percentage removal was achieved at a pH of 8.0 by both adsorbents. The optimum conditions obtained for both adsorbents were 4.5 g adsorbent dose, 30 min contact time and 25 o C for coconut shell, and 4.5 g adsorbent dose, 120 mins and 25 o C for banana peel. The Langmuir isotherm best described the adsorption, with correlation coefficient (R 2 ) values of 0.9821 and 0.9744 for banana peel and coconut shell respectively. The mean free energy from the Dubinin-Radushkevich isotherm suggested chemisorption, and the adsorption mechanism was found to fit the second order.

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Section: Effect Of Temperature On Adsorptionmentioning

confidence: 76%

Section: Effect Of Adsorbate Concentration On Adsorptionmentioning

confidence: 96%

Adsorption of Nickel(II) Ions from Aqueous Solution using Banana Peel and Coconut Shell

Olufemi¹,

Eniodunmo²

2018

IJTech

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show abstract

“…Moreover, thermodynamic studies exposed that the retention step is also random, exothermic, physisorption and spontaneous in nature [47] [61]. The adsorption capacity of CH in this study was compared with those found in previous studies using different biosorbents, as shown in Table 3.…”

Section: Thermodynamic Characteristicsmentioning

confidence: 95%

Retention Profile of Zn<sup>2+</sup> and Ni<sup>2+</sup> Ions from Wastewater onto Coffee Husk: Kinetics and Thermodynamic Study

Alhogbi¹,

Al-Enazi²

2018

JEAS

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In this work, Coffee husk (CH) was used as a solid phase extractor (SPE) for removal and/or minimization of Zn 2+ and Ni 2+ ions in aqueous media. XRD, FESEM and FTIR analysis of the SPE were performed for surface morphology and function groups characterisation. Batch mode adsorption studies were performed by varying the operational parameters such as adsorbent dose, solution pH, initial analyte concentration and contact time. The equilibrium data of both analytes was found a better fit with the Langmuir and Freundlich isotherm models. The q m of Langmuir for Zn 2+ and Ni 2+ ions were 12.987 and 11.11 mg/g, respectively. The adsorption capacities of the CH adsorbent towards Zn 2+ and Ni 2+ resulted of 12.53 and 10.33 mg/g, respectively. In addition, the kinetic data of Zn 2+ and Ni 2+ ions uptake revealed that the present system fitted well with pseudo-second-order kinetic model (R 2 > 0.99). Thermodynamic studies showed that the retention step was exothermic, and spontaneous in nature. The results indicated that the coffee husk provides an effective and economical approach in highly reducing or almost eradication of both metals Zn 2+ and Ni 2+ from the aqueous solution.

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“…The model is based on the adsorption capacity in solid phases, in which it has been applied for the analysis of kinetic rate of chemisorption [33][34][35].…”

Section: Kinetic and Equilibrium Studiesmentioning

confidence: 99%

Carbon-covered mesoporous silica and its application in Rhodamine B adsorption

Nascimento

Silva

Meili

2017

Environmental Technology

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Modified versions of MCM-41 and SBA-15 were obtained from sucrose by carbon deposition. The ability of the resulting materials, MCM-41 CC and SBA-15 CC, to remove Rhodamine B from aqueous solutions was evaluated. TG/DTG, XRD, Nitrogen Adsorption (BET), and SEM were used to characterize the materials. Adsorption was investigated by finite bath studies. To characterize the adsorption behavior and mechanism, kinetics and equilibrium were assessed. MCM-41 CC provided the best adsorption results: adsorptive capacity of 11.91 mg of dye/g of material and 91.95% w/v dye removal (C = 50 mg L). The sucrose particles interacted well, to result in improved area and micropore volume. Hence, carbon deposition can afford materials with increased adsorptive capacity depending on the sieve employed during their preparation.

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The adsorption kinetics and modeling for heavy metals removal from wastewater by Moringa pods

Cited by 236 publications

References 28 publications

Adsorption of Nickel(II) Ions from Aqueous Solution using Banana Peel and Coconut Shell

Adsorption of Nickel(II) Ions from Aqueous Solution using Banana Peel and Coconut Shell

Retention Profile of Zn<sup>2+</sup> and Ni<sup>2+</sup> Ions from Wastewater onto Coffee Husk: Kinetics and Thermodynamic Study

Carbon-covered mesoporous silica and its application in Rhodamine B adsorption

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The adsorption kinetics and modeling for heavy metals removal from wastewater by Moringa pods

Cited by 236 publications

References 28 publications

Adsorption of Nickel(II) Ions from Aqueous Solution using Banana Peel and Coconut Shell

Adsorption of Nickel(II) Ions from Aqueous Solution using Banana Peel and Coconut Shell

Retention Profile of Zn&lt;sup&gt;2+&lt;/sup&gt; and Ni&lt;sup&gt;2+&lt;/sup&gt; Ions from Wastewater onto Coffee Husk: Kinetics and Thermodynamic Study

Carbon-covered mesoporous silica and its application in Rhodamine B adsorption

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Retention Profile of Zn<sup>2+</sup> and Ni<sup>2+</sup> Ions from Wastewater onto Coffee Husk: Kinetics and Thermodynamic Study