Authors: O.V. Salishcheva, Yu.V. Tarasova, V.V. Chenskaya

Title of the article: Article title determination of kinetic characteristics of adsorption of cadmium(II) and lead(II) ions from aqueous solution using plant waste

Year: 2025, Issue: 1, Pages: 5-13

Branch of knowledge: 2.6.7. Technology of inorganic substances

Index UDK: 621.9.04533.583.2:615.322

DOI: 10.26730/1999-4125-2025-1-5-13

Abstract: A huge number of different pollutants, especially heavy metals, have accumulated in the environment over the past few decades. These negative consequences have been caused by the continuous growth of production and intensive industrial and agricultural activities of mankind, which pose a real threat to the biosphere. The importance of studying the adsorption of heavy metal ions cannot be underestimated, especially in a deteriorating environmental situation. Natural adsorbents, such as walnut shells and pine cones, can be an effective means of removing toxic substances from wastewater and polluted ecosystems. The effectiveness of their use is due to their unique structure and chemical composition, which allows you to bind metal ions and minimize their harmful effects. Kinetic and equilibrium data on the adsorption of heavy metal ions cadmium(II), lead(II) by various natural materials were obtained: walnut shells, cedar cone shells, pomegranate wastes. Based on the data obtained, it is possible to identify the key factors affecting the adsorption process - the pH of the solution, temperature and contact time. Experiments have demonstrated that optimal conditions contribute to the maximum retention of lead ions on the shell of a cedar cone. The kinetic characteristics of the adsorption process were calculated, and the mechanism of its course was revealed. Further research in this area may open up new prospects for the use of natural adsorbents for cleaning water bodies and soil. Developing technologies based on local resources can significantly reduce clean-up costs and improve the environmental situation in pollution-prone regions.

Key words: adsorption heavy metals biosorbents cedar cone shell walnut shell pomegranate shell kinetic characteristics reaction order

Receiving date: 01.12.2024

Approval date: 22.01.2025

Publication date: 12.03.2025

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