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Advances in Materials for Water Treatment and Metal/Nutrient Recovery

A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Materials Science".

Deadline for manuscript submissions: 25 December 2026 | Viewed by 566

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Guest Editor
Department of Chemical Engineering and Metallurgy, Universidad de Sonora, Hermosillo, Sonora, Mexico
Interests: water and wastewater treatment; waste/residues revalorization; adsorption; hybrid processes
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Special Issue Information

Dear Colleagues,

Water is an essential and irreplaceable resource for life, yet its quality is increasingly threatened by diverse contaminants, ranging from excess nutrients to persistent and recalcitrant pollutants. Addressing these challenges requires materials engineered with molecular-level control over composition, surface chemistry, porosity, and reactivity features that enable selective contaminant removal and the recovery of valuable elements. The development of such materials is crucial not only for enhancing water and wastewater treatment efficiency but also for facilitating the recovery of valuable metals and nutrients as secondary resources within a circular-economy framework.

The purpose of this Special Issue is to compile recent advances in the development, characterization, and application of materials for water and wastewater treatment, with particular emphasis on metal and nutrient recovery, although contributions are not restricted to these topics. Submissions focusing on the synthesis, characterization, mechanistic understanding, and performance evaluation of materials such as biochar, composites, zeolites, nanomaterials, and revalorized waste-derived materials are welcome, provided that their molecular-scale features and mechanisms relevant to water treatment are clearly elucidated. Studies conducted at the laboratory scale using synthetic solutions are suitable, while investigations using real wastewater matrices are particularly encouraged.

Dr. Aurora Pat-Espadas
Guest Editor

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Keywords

  • water treatment
  • wastewater treatment
  • recalcitrant pollutants
  • metal recovery
  • nutrient recovery
  • molecularly engineered materials
  • functional materials
  • adsorption and remediation

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Published Papers (1 paper)

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Research

21 pages, 4692 KB  
Article
Solar-Driven Rhodamine B Degradation Using Biogenically Recovered Mixed Metal(Loid) Sulfides Derived from Metallurgical Waste
by María Rosario Sánchez-Macías, Adrián Ramírez Parada, Diego Hernández Martinez, Santos J. Castillo, Francisco J. Almendariz Tapia, Francisco J. Cervantes and Aurora M. Pat-Espadas
Int. J. Mol. Sci. 2026, 27(13), 5689; https://doi.org/10.3390/ijms27135689 - 24 Jun 2026
Viewed by 283
Abstract
Biogenically recovered mixed metal(loid) sulfides (BPS) obtained from metallurgical effluents were evaluated as sustainable photocatalysts for the solar-driven degradation of Rhodamine B (RhB). The material, recovered using biogenic sulfide produced by sulfate-reducing bacteria in an upflow anaerobic sludge bed reactor, was mainly composed [...] Read more.
Biogenically recovered mixed metal(loid) sulfides (BPS) obtained from metallurgical effluents were evaluated as sustainable photocatalysts for the solar-driven degradation of Rhodamine B (RhB). The material, recovered using biogenic sulfide produced by sulfate-reducing bacteria in an upflow anaerobic sludge bed reactor, was mainly composed of Sb2S3 and Bi-containing sulfide phases and exhibited a fibrous morphology and a narrow direct band gap of 1.306 eV. Under solar irradiation, BPS achieved RhB degradation efficiencies above 98% under the evaluated conditions (0.8 g L−1 catalyst and 5 mg L−1 dye), consistently outperforming reagent-grade Sb2S3. Photocatalytic degradation followed pseudo-first-order kinetics (R2 > 0.90), and the apparent reaction rate constant was more than five times higher than that of the reference material under the best-performing conditions. A preliminary reusability assessment and post-reaction characterization after three photocatalytic cycles revealed no significant morphological or compositional changes in BPS. These results demonstrate that waste-derived metal(loid) sulfides recovered through a biogenic process can serve as effective solar photocatalysts, highlighting a promising circular-economy strategy for transforming metallurgical residues into value-added materials for water remediation. Full article
(This article belongs to the Special Issue Advances in Materials for Water Treatment and Metal/Nutrient Recovery)
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