September 10, 2025Colloids and InterfacesOpen Access

Removal of Copper (II) from Aqueous Solutions Using Silica Xerogel as Sorbent: Adsorption Properties and Mechanism

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Removal efficiency of copper (II) ions by silica xerogel exceeds 99%, showcasing its potential for wastewater treatment.
The maximum adsorption capacity of copper (II) ions on silica xerogel reaches 67.5 mg/L, emphasizing its effectiveness as a sorbent.
The electrostatic interactions between positively charged Cu(II) ions and negatively charged surface groups drive the adsorption process.
Characterization techniques confirm the silica xerogel's high surface area (~347 m2/g) and uniform mesoporosity (2–14 nm).

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Batch experiments demonstrate over 99% removal efficiency of copper (II) in aqueous solutions, indicating silica xerogel's effectiveness.

Shanaz et al. (2025) studied this question.

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