Methylparaben adsorption on calcined layered double hydroxides: Kinetics and isotherm modeling

IF 2.218 Q2 Chemistry Chemical Data Collections Pub Date : 2025-03-10 DOI:10.1016/j.cdc.2025.101187

N'guadi Blaise Allou , Patrick Athéba , Jitu Saikia , Kidjoufol Abdoul-Aziz Soro , Aimé Serge Ello

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引用次数: 0

Abstract

This work aimed to study and model methylparaben (MPB) adsorption on calcined Mg/Al layered double hydroxides (LDH). After the precursor LDH synthesis followed by their calcination completed, adsorption tests were carried out by studying contact time, initial MPB concentration and temperature effects. Data collected from these tests were used to model MPB adsorption mechanism, both in terms of kinetics and isotherm, using several mathematical models. Although pseudo−first−order, Elovich and Bangham models presented acceptable correlation coefficient values, those of pseudo−second−order were much better, indicating that MPB adsorption process on calcined LDH did not follow interstitial diffusion. However, adsorption process would also be limited by extra−particle transport according to Boyd model. As for adsorption isotherm modeling, correlation coefficients comparison added to separation factor

R_{L}

(between 0 and 1) and adsorption intensity

n

(greater than 1) calculated values, it can be retain that Langmuir and Freundlich models indicated favorable adsorption. In addition, the maximum adsorption capacity obtained through Langmuir model was 52.63 mg g⁻¹. Furthermore, from energy point of view, Temkin model would also be suitable to describe MPB adsorption phenomenon on calcined LDH. The latter indicates that adsorption process was exothermic.

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来源期刊

Chemical Data Collections Chemistry-Chemistry (all)

CiteScore

6.10

自引率

0.00%

发文量

169

审稿时长

24 days

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