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

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.