Analysis and optimization of the adsorption of lead ions on a new material based on silica synthesized from blast furnace slag

Authors

TOUFIK CHOUCHANEFollow
OUAHIDA KHIREDDINEFollow
SABIHA CHOUCHANEFollow
MOHAMED TAYEB ABEDGHARSFollow
HAZEM MERADIFollow

Abstract

A novel silica-based material (SBM), synthesized from chemically, thermally, and mechanically treated blast furnace slag (TBFS), was examined for its batch-mode lead adsorption capacity, based on various parameters. Physico-chemical examinations revealed that the formulation of the new material (SBM) consists mainly of silica, which represents 81.79% of its total composition. After modification, the measured specific surface area changed significantly, from 275.8 to 480.13 m2/g, with a point of zero charge (PZC) of approximately 3.4 on the pH scale. The experiment revealed that the driving factors (contact time, stirring speed, solution pH, temperature, and initial concentration) greatly influenced the improvement of lead adsorption capacity, which reached a value of 164.84 mg/g after 40 minutes of interaction. The adsorption isotherms demonstrated that the lead adsorption took place on a homogeneous surface and in a single layer, which is confirmed by the correlation coefficient and the ability to adsorb of the Langmuir model. The separation factor (RL) and heterogeneity factor (1/n) demonstrated that adsorption is favorable, while the Temkin parameter (bt) revealed that removal occurs through physical adsorption.. According to kinetic analysis, this process follows a pseudo-second-order kinetic model and is regulated by both external diffusion and internal diffusion. Thermodynamic parameters demonstrated that lead adsorption is a spontaneous, exothermic, less entropic, and physical process, driven by electrostatic interaction. Activation energy claimed that the lead removal process occurs through physical adsorption.

Author ORCID Identifier

TOUFIK CHOUCHANE: 0000-0001-8979-0667

OUAHIDA KHIREDDINE: 0000-0001-6890-5744

SABIHA CHOUCHANE: 0000-0003-2587-4372

MOHAMED ABEDGHARS: 0000-0003-4975-2302

HAZEM MERADI: 0000-0002-4606-0821

DOI

10.55730/1300-0527.3705

Keywords

Adsorption, lead, kinetics, slag, silica

First Page

867

Last Page

884

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

Recommended Citation

CHOUCHANE, TOUFIK; KHIREDDINE, OUAHIDA; CHOUCHANE, SABIHA; ABEDGHARS, MOHAMED TAYEB; and MERADI, HAZEM (2024) "Analysis and optimization of the adsorption of lead ions on a new material based on silica synthesized from blast furnace slag," Turkish Journal of Chemistry: Vol. 48: No. 6, Article 8. https://doi.org/10.55730/1300-0527.3705
Available at: https://journals.tubitak.gov.tr/chem/vol48/iss6/8