EFFECT OF pH ON SIMULTANEOUS POTENTIAL ADSORPTION OF Pb, Cd AND Cr IN CONTAMINATED SOIL USING ZEOLITE | Hạnh | TNU Journal of Science and Technology

EFFECT OF pH ON SIMULTANEOUS POTENTIAL ADSORPTION OF Pb, Cd AND Cr IN CONTAMINATED SOIL USING ZEOLITE

About this article

Received: 01/03/24                Revised: 29/05/24                Published: 29/05/24

Authors

1. Nguyen Thi Bich Hanh Email to author, 1) TNU - University of Sciences, 2) TNU - University of Agriculture and Forestry
2. Van Huu Tap, TNU - New Technology Development Center
3. Dang Van Minh, TNU - University of Agriculture and Forestry

Abstract


Heavy metal pollution in soil has been proven to have adverse effects on human health and the ecosystem. There are many methods to treat heavy metal pollution, among which the adsorption method is effective and low-cost. Zeolite, known for its ion exchange properties and environmental friendliness, offers a cost-effective solution for soil treatment. This study investigates and evaluates the impact of soil pH on the adsorption capacity of zeolite for Pb, Cd, Cr. The research methodology involved setting up laboratory experiments under the following conditions: examining soil pH values ranging from 5 to 9, contaminating the soil with Pb, Cd, and Cr ions at a total concentration of 50 mg/kg, incubating the soil with zeolite material for 30 days at room temperature (25°C), and maintain soil moisture between 70-80%. The results show that Cr experienced the highest reduction in mobility (15.59%) at pH 5, while Pb and Cd showed the most optimal mobility reduction at pH 7 (18.89% and 49.2%, respectively). These findings contribute to the evaluation of zeolite's effectiveness in adsorbing heavy metal ions and the importance of soil pH in the treatment process.

Keywords


Soil pH; Adsorption; Polluted soil; Zeolite; Pb, Cd, Cr

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DOI: https://doi.org/10.34238/tnu-jst.9813

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