Hydrothermal preparation of coal gangue-derived heterogeneous structures for selective adsorption enhanced photocatalytic removal of Cr(VI) ions in tar-rich coal mine water.

ABSTRACT: As the acidity increases, certain heavy metal ions in mine water, such as Cr(VI) ions, transition from insoluble compounds to soluble states, increasing their toxicity. Therefore, how to efficiently remove Cr(VI) ions under acidic conditions is an urgent task. Herein, we utilize the coal gangue associated with oil-rich coal mines as the main catalyst carrier. By high-temperature calcination and acid washing of its powder, we obtain a large-pore molecular sieve. Under hydrothermal conditions, we induce the growth and nucleation of water-resistant and acid-resistant MOF (UiO-66-NH₂) using these molecular sieves as crystal nuclei and carriers, thus forming a composite heterogeneous structure. In this composite heterogeneous material, the molecular sieves, due to their large pores a

SUBMITTER: Ren X 

PROVIDER: S-EPMC12800178 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature