Si Yang, Meilun Zhang
Phosphogypsum (PG) produced by different wet-process phosphoric acid routes exhibits distinct mineralogical characteristics and metal ion release behaviors, which may influence its environmental risk and resource utilization potential. In this study, PG generated from the hemihydrate–dihydrate (HH-DH) and dihydrate (DH) processes was systematically investigated to elucidate the occurrence states, distribution characteristics, and leaching behavior of metal ions. Particle size distribution analysis, water-leaching experiments, Advanced Mineral Identification and Characterization System (AMICS), and Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES) were employed to characterize the particle size distribution, mineral composition, elemental distribution, and mineral liberation behavior before and after leaching. The results showed that gypsum was the dominant mineral phase, while quartz and phosphorus-containing gypsum (PCG) were the major impurity minerals. K and Na mainly occurred in soluble mineral phases and exhibited high leaching rates, whereas Al, Fe, and Mg were primarily associated with relatively stable insoluble minerals and showed limited leaching behavior. After water leaching, the particle size distribution shifted toward finer particles, accompanied by decreases in gypsum content and mineral liberation degree, especially in HH-DH phosphogypsum.
@article{0f08da8e-e3d6-4daf-b173-435962509a2d,
title={2026 Yang Metal Leaching Behaviour of Phosphogypsum},
author={Si Yang and Meilun Zhang},
year={2026},
language={en}
}TY - JOUR TI - 2026 Yang Metal Leaching Behaviour of Phosphogypsum AU - Si Yang AU - Meilun Zhang PY - 2026 LA - en ER -
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