Daset: Biotemplate-assisted morphology and porosity of nanosilica: eco-friendly synthesis and application as an adsorbent for pharmaceutical contaminants in water

This dataset evaluates the performance of a high–surface area solid adsorbent for the removal of hydroxychloroquine (HCQ) and oseltamivir (OSEL) from water in batch systems. The research hypothesis states that the material exhibits high affinity and retention for both pharmaceuticals under ambient conditions, with rapid kinetics, adsorption dependent on dose and pH, endothermic behavior, and operational stability over multiple reuse cycles.

The dataset includes: (i) dose study (1–80 mg), where increasing mass reduces Ce and increases removal, reaching >98% at high doses; (ii) pH (2–12 and natural), with maximum Qe around pH 6–natural; (iii) stirring speed (0–300 rpm), showing higher removal until stabilization at ~200 rpm; (iv) kinetics (1–120 min) with Ct and Qe series suitable for PFO, PSO, Elovich, intraparticle diffusion, and Bangham models; (v) isotherms at 15, 25, 40, and 55 °C for Langmuir, Freundlich, and Redlich–Peterson fitting; (vi) thermodynamics, with ΔG<0 at all temperatures, ΔH>0, and positive ΔS, indicating endothermic adsorption; (vii) competitive adsorption HCQ+OSEL, reporting individual and total Qe (mmol/g); (viii) reuse over 10 cycles, maintaining high removal with slight gradual decrease.

Each experiment was performed in triplicate (Co1–Co3, Ce1–Ce3) and includes averages, standard deviations, and RSD values. Variables comprise Co, Ce, Ct (mg/L), %Removal, and Qe (mg/g or mmol/g), with constant solution volume and adsorbent mass for each series.

The data allow modeling of adsorption kinetics, equilibrium, and thermodynamics, as well as evaluation of the influence of operational parameters, binary systems, and material reuse. Users can employ Co–Ce–Qe values to calculate process design parameters, compare with other materials, or perform simulations.

Method: batch tests in aqueous HCQ and OSEL solutions, varying dose, pH, stirring speed, contact time, and temperature according to each experimental objective. Concentrations were determined by spectrophotometric analysis with compound–specific calibration curves.

Keywords: Adsorption; pharmaceutics; Kinetics; Isotherms; Thermodynamics; Binary competition; Reuse; Water treatment.