. 2021 Jan 21;11(2):78. doi: 10.3390/membranes11020078
© 2021 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 (http://creativecommons.org/licenses/by/4.0/).
Figure 5.
XRD for the MCM-41 obtained from coal ash.