RT Journal Article T1 Phosphogypsum circular economy considerations: A critical review from more than 65 storage sites worldwide A1 Bilal, Essaid A1 Ruiz Cánovas, Carlos A1 Nieto Liñán, José Miguel A1 Haneklaus, Nils AB Nearly 300 million t of phosphogypsum (PG) are produced every year as a byproduct from phosphate fertilizerproduction worldwide. Approximately 58% of the PG are stacked, 28% are discharged in coastal waters and only14% are further processed. This critical review provides an overview of the physical-chemical properties of PGproduced from sedimentary and magmatic phosphate ore worldwide using various analytical tools. Results frommore than 25 years of work on PG at ´Ecole des Mines de Saint-´Etienne are presented and critically discussed. Intotal PG samples from 67 industrial storage sites around the world and PG samples synthesized under differentconditions in the laboratory have been considered. The low radioactivity present in PG (particularly PG producedfrom sedimentary phosphate rock) was identified as the main challenge to using PG as a raw material in construction.Water-soluble and volatile chemical compounds were identified as the main challenge to environmentallysound PG management. Although PG does (in most cases) not pose an immediate threat to theenvironment the authors recommend processing all PG instead of storing or disposing it, to eliminate potentiallong-term risks and utilize a relevant secondary resource. PB Elsevier SN 0959-6526 YR 2023 FD 2023-05 LK https://hdl.handle.net/10272/22433 UL https://hdl.handle.net/10272/22433 LA eng NO Bilal, E., Bellefqih, H., Bourgier, V., Mazouz, H., Dumitraş, D.-G., Bard, F., Laborde, M., Caspar, J. P., Guilhot, B., Iatan, E.-L., Bounakhla, M., Iancu, M. A., Marincea, Ş., Essakhraoui, M., Li, B., Diwa, R. R., Ramirez, J. D., Chernysh, Y., Chubur, V., … Haneklaus, N. (2023). Phosphogypsum circular economy considerations: A critical review from more than 65 storage sites worldwide. In Journal of Cleaner Production (Vol. 414, p. 137561). Elsevier BV. https://doi.org/10.1016/j.jclepro.2023.137561 NO French National Research Agency (ANR), Ecole Nationale Supérieure des Mines de Saint-Etienne, Lafarge Division Plaster, OCP Group, Technology Agency of the Czech Republic (TA CR) [Grant Number: TH79020003] and German Federal Ministry of Education and Research [Project Number: 033RU020A] support for this project is offered underthe coordination of the ERA-MIN3 action, which has received funding from the European Union under the Horizon 2020 Program [European Commission Grant Agreement No. 101003575]. Besides, this work also received support by: the Ministry of Education, Youth and Sport of the Czech Republic (8J22AT005), the Austrian Federal Ministry of Education,Science and Research (BMBWF) through Austria's Agency for Education and Internationalization (OeAD) [Grant Number: Africa UniNet P006 and P058 as well as WTZ CZ 14/2022, HR 09/2022 and TW 01/2021], the German Federal Ministry of Education and Research funding under Bridge2ERA2021 [Grant No. 100579052] and the Spanish Ministry of Economy and Competitiveness through the project VALOREY [MINECO; RTI 2018-101276-J-I00]. C.R. Cánovas further thanks theSpanish Ministry of Science and Innovation for the Postdoctoral Fellowship granted under application reference RYC2019-027949-I. DS Repositorio Institucional de la Universidad de Huelva RD 30 may 2026