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The effect of zeolite, ZnO, and CuO nanoparticles on heavy metals retention in a sandy loam soil: A column leaching and batch study

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Abstract

Heavy metals leaching can be reduced in soils with low adsorption properties using stabilizers. Our objective was to study the effect of zeolite, ZnO, and CuO nanoparticles on cadmium (Cd2+), copper (Cu2+), cobalt (Co2+), nickel (Ni2+), and zinc (Zn2+) retention in a sandy loam soil using both repacked soil column and batch adsorption experiments. The stabilized soil samples for filling the column were prepared by adding 2% CuO, ZnO nanoparticles, and zeolite and were packed uniformly with a bulk density of 1.35 g cm–3 and were saturated with 0.01 M CaCl2 before beginning the experiments. The columns were leached with a solution contains 50 mg l−1 Cd2+, Cu2+, Co2+, Ni2+, and Zn2+. In comparison to the control, the retardation factor value indicated that the addition of ZnO nanoparticles to the sandy loam soil had the greatest effect on decreasing the mobility of heavy metals, with the following trend: Cu2+ > Co2+ > Cd2+ > Ni2+. The order of adsorption amount of the selected heavy metals under single adsorption conditions for all treatments was as follows: Cu2+ > Zn2+ > Ni2+ > Cd2+ > Co2+, while in multi-component solutions, the highest sorption was found for Cu2+ and Co2+, indicating that in both systems, stabilized soils had more adsorption capacity for Cu2+ and Co2+ than the control soil. It was observed that during both tests, the adsorption and retention of all selected heavy metals in nanoparticles stabilized soils were potentially high compared to zeolite stabilized soil.

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The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.

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H. Mohebian carried out the experiments and processed the experimental data. M. Jalali designed and directed the project, contributed to the interpretation of the results and edited the manuscript. H. Merrikhpour aided in interpreting the results and took the lead in writing the manuscript. All authors discussed the results and contributed to the final manuscript.

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Correspondence to Hajar Merrikhpour.

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Mohebian, H., Jalali, M. & Merrikhpour, H. The effect of zeolite, ZnO, and CuO nanoparticles on heavy metals retention in a sandy loam soil: A column leaching and batch study. Environ Earth Sci 81, 407 (2022). https://doi.org/10.1007/s12665-022-10507-5

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  • DOI: https://doi.org/10.1007/s12665-022-10507-5

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