Experimental data for Cu(II) adsorption on chitosan–alginate–CaCO₃ biocomposites

Published: 26 January 2026| Version 1 | DOI: 10.17632/vbknf4bxx7.1
Contributors:
, LAURA GUTIERREZ,

Description

This dataset contains the experimental adsorption isotherms and kinetic data for Cu2+ removal using hierarchically porous chitosan–alginate–CaCO₃ biocomposites. Data include equilibrium adsorption capacities and adsorption kinetics obtained using different copper counter-ions under controlled experimental conditions.

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The data were generated through batch adsorption experiments using a hierarchically porous chitosan–alginate–calcium carbonate biocomposite synthesized via controlled polyelectrolyte complexation, in situ CaCO₃ mineralization, and glutaraldehyde crosslinking, as described in detail in the associated manuscript. Adsorption isotherms were obtained by contacting a fixed mass of adsorbent with Cu²⁺ aqueous solutions of varying initial concentrations, prepared from different copper salts (sulfate, acetate, and nitrate), at controlled pH (5.5) and temperature (35 °C). The suspensions were agitated for sufficient time to reach equilibrium, after which residual Cu²⁺ concentrations were quantified by UV-VIs spectroscopy. Kinetic experiments were performed by sampling aliquots at predetermined time intervals under identical pH and temperature conditions. All experiments were conducted in triplicate, and average values were reported. Raw experimental data were processed using standard spreadsheet software to calculate adsorption capacities (qₑ and qₜ) and removal efficiencies. No custom code or proprietary software was used for data processing.

Institutions

CONICET Santa Fe, Universidad Nacional del Litoral

Categories

Adsorption Isotherm, Biopolymer, Langmuir-Freundlich Isotherm Model, Polymer Crosslinking, Adsorption Kinetics, Zeta Potential, Cation Adsorption

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