MAGNETIC FA–CS/FE₃O₄ COMPOSITE: SYNTHESIS OPTIMIZATION, CHARACTERIZATION, AND LANGMUIR ISOTHERM ANALYSIS FOR PB(II) AND CU(II) REMOVAL

Description

This dataset was generated to evaluate the performance of a magnetic fly ash–chitosan composite (FA–CS/Fe₃O₄) for the removal of Pb(II) and Cu(II) from aqueous solutions. The working hypothesis is that the incorporation of chitosan and Fe₃O₄ into fly ash enhances adsorption capacity and enables magnetic separation of the adsorbent. The dataset includes raw and processed data obtained from material synthesis, physicochemical characterization (BET surface area, XRD patterns, FTIR spectra, and SEM images), and batch adsorption experiments conducted under controlled laboratory conditions. Adsorption data were collected by varying operational parameters such as initial metal concentration, adsorbent dosage, and contact time, and were further structured using Response Surface Methodology with Central Composite Design (RSM–CCD). The data show adsorption responses of Pb(II) and Cu(II) under different experimental conditions, including equilibrium data used for isotherm modeling. Notable findings include differences in adsorption behavior between Pb(II) and Cu(II), reflected in the isotherm datasets and model outputs. The dataset can be interpreted through adsorption capacity (qe), equilibrium concentration (Ce), and statistical modeling outputs. It can be reused for comparison with other adsorbents, validation of adsorption models, and further studies in wastewater treatment and material development.

Steps to reproduce

Sample Preparation Collect fly ash (FA) from PT Bukit Asam. Dry and sieve to obtain uniform particle size. Synthesis of FA–CS/Fe₃O₄ Composite Disperse FA and chitosan in acetic acid solution under stirring. Add FeCl₃·6H₂O and FeCl₂·4H₂O solutions, followed by NaOH addition to initiate co-precipitation. Continue stirring until composite forms. Wash with deionized water until neutral pH, dry, and grind. Material Characterization BET: Measure surface area and pore characteristics XRD: Record diffraction patterns FTIR: Identify functional groups SEM: Capture surface morphology images Preparation of Metal Solutions Prepare Pb(II) and Cu(II) solutions at desired initial concentrations using standard stock solutions. Batch Adsorption Experiments Add a known mass of adsorbent into metal solutions. Agitate at constant speed for predetermined contact times. Separate solid and liquid phases after adsorption. Concentration Analysis (AAS) Measure residual Pb(II) and Cu(II) concentrations using Atomic Absorption Spectroscopy (AAS). Use calibration curves prepared from standard solutions. Experimental Design (RSM–CCD) Design experiments using Central Composite Design with variables: adsorbent dosage, contact time, and initial concentration. Perform experiments according to the design matrix. Data Processing and Modeling Process data using Microsoft Excel. Perform statistical analysis and modeling using Design-Expert software. Generate response surface plots and isotherm data (Ce and qe).

Institutions

• Universitas Muhammadiyah Palembang

  South Sumatra, Palembang

Categories

Funders

• Ministry of Education and Culture

  Jakarta, Jakarta

Licence