Ceramics materials with perovskite, pyrochlore and spinel structures for use as efficient and reusable adsorbents

Mixed oxides with perovskite (ABO 3 ), pyrochlore (A 2 B 2 O 7 ) and spinel (AB 2 O 4 ) structures were synthesized to studying them as potential adsorbents of environmental contaminants, including a possible reuse of the materials prepared. For materials with the perovskite structure and calcium(II) doping, the use of collagen during the synthesis subtly inhibited the formation of the solid solution, resulting in materials that were less efficient as adsorbents for removing TB from the medium. Undoped perovskite and pyrochlore adsorbents showed similar TB removal efficiencies, with undoped materials being the most effective for TB removal. Materials with perovskite and pyrochlore structures showed high efficiency in removing TB and CR from aqueous media, whereas the spinel-structured material was less effective. The efficiencies of materials as adsorbents are affected by the type and amount of metal in the structure sites, as well as by the structure itself. Despite this, all the synthesized materials showed excellent results in the cycle reuse study, maintaining TB removal efficiency throughout all cycles, with the perovskite structure standing out. They are efficient and sustainable materials for removing contaminants from synthetic solutions and industrial effluents because they are regenerable and reusable.