. 2024 Nov 20;29(22):5486. doi: 10.3390/molecules29225486
© 2024 by the authors.
Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Figure 6.
O1s spectra of phosphogypsum samples.