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. 2025 May 17;15:17197. doi: 10.1038/s41598-025-01155-3

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© The Author(s) 2025

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Fig. 6 — (a) The effect of heat treatment on the X-ray diffraction pattern of natural dispersive soil and soil containing copper pollutant. (b) The intensity change plot of the main peaks of dispersive soil containing copper pollutant under thermal levels.