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Related Concept Videos

Microbial Leaching01:27

Microbial Leaching

Microbial leaching, also known as bioleaching, is an environmentally favorable method for extracting metals from low-grade ores using specific microorganisms. This biotechnological approach is particularly valuable for mining operations targeting copper, gold, and uranium, where traditional extraction methods may be economically or environmentally impractical.Copper Leaching and Microbial CatalysisIn copper bioleaching, crushed ore is arranged into heaps and irrigated with a dilute sulfuric...
Acid Mine Drainage01:19

Acid Mine Drainage

Mining activities that disturb sulfide-rich rocks, particularly those containing pyrite (FeS₂), initiate a cascade of geochemical and microbiological processes with serious environmental implications. When exposed to air and water, pyrite undergoes oxidation, releasing sulfate, ultimately forming sulfuric acid and mobilizing heavy metals into surrounding water systems. This phenomenon, known as acid mine drainage (AMD), results in low pH waters laden with toxic elements that threaten aquatic...
Microbial Bioremediation of Uranium01:25

Microbial Bioremediation of Uranium

Microorganisms play a critical role in the transformation and immobilization of uranium in contaminated environments through four main pathways: bioreduction, biosorption, bioaccumulation, and biomineralization. These mechanisms reduce uranium’s toxicity and prevent its migration through groundwater systems, offering sustainable approaches for in situ bioremediation.Bioreduction of UraniumBioreduction is driven by anaerobic bacteria such as certain strains of Geobacter and Shewanella, which use...
Bioremediation00:46

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Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.
Microbes and Other Elemental Cycles01:24

Microbes and Other Elemental Cycles

Microbial activity plays a pivotal role in the biogeochemical cycling of iron and manganese, especially at the redox gradients characteristic of stratified aquatic environments. These cycles are driven by microbial transformations between oxidized and reduced forms of the metals, allowing organisms to exploit them for metabolic energy and structural purposes.Iron Cycling Across Redox GradientsIn neutral, oxygen-rich surface waters, iron is predominantly found in its oxidized, insoluble ferric...
Microbial Corrosion01:24

Microbial Corrosion

Microbiologically Influenced Corrosion (MIC) is a significant form of material degradation caused by the metabolic activities of microorganisms. This phenomenon poses substantial challenges across various industries, including oil and gas, maritime, and water treatment sectors.MIC occurs when microorganisms, such as bacteria, archaea, and fungi, colonize metal surfaces, forming biofilms that alter the local electrochemical environment. These biofilms can lead to the production of corrosive...

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Updated: Jul 16, 2026

Developing Photosensitizer-Cobaloxime Hybrids for Solar-Driven H2 Production in Aqueous Aerobic Conditions
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Developing Photosensitizer-Cobaloxime Hybrids for Solar-Driven H2 Production in Aqueous Aerobic Conditions

Published on: October 5, 2019

Solar-Driven Rhodamine B Degradation Using Biogenically Recovered Mixed Metal(Loid) Sulfides Derived from

María Rosario Sánchez-Macías1, Adrián Ramírez Parada1, Diego Hernández Martinez1

  • 1Department of Chemical and Metallurgical Engineering, Interdisciplinary Faculty of Engineering, University of Sonora, Hermosillo 83000, Mexico.

International Journal of Molecular Sciences
|July 15, 2026
PubMed
Summary

Waste-derived metal sulfides recovered using biogenic processes show high efficiency for solar-driven Rhodamine B degradation. This sustainable approach transforms metallurgical residues into effective photocatalysts for water remediation.

Keywords:
circular economymetal(loid) sulfidesphotocatalysisresource recoverywastewater treatment

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Development of Sulfidogenic Sludge from Marine Sediments and Trichloroethylene Reduction in an Upflow Anaerobic Sludge Blanket Reactor
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15:19

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Published on: October 15, 2015

Area of Science:

  • Materials Science
  • Environmental Chemistry
  • Biotechnology

Background:

  • Metallurgical effluents contain metal(loid) sulfides.
  • Biogenic sulfide precipitation offers a sustainable recovery method.
  • Photocatalysis is a key technology for water remediation.

Purpose of the Study:

  • To evaluate biogenically recovered mixed metal(loid) sulfides (BPS) as photocatalysts.
  • To assess the solar-driven degradation of Rhodamine B (RhB) using BPS.
  • To explore a circular economy strategy for metallurgical waste.

Main Methods:

  • Recovery of BPS from metallurgical effluents using biogenic sulfide.
  • Characterization of BPS composition (Sb2S3, Bi-sulfides) and band gap (1.306 eV).
  • Solar-driven photocatalytic degradation experiments of RhB using BPS.

Main Results:

  • BPS achieved >98% RhB degradation efficiency under solar irradiation.
  • BPS outperformed reagent-grade Sb2S3, with a rate constant over five times higher.
  • Degradation followed pseudo-first-order kinetics (R2 > 0.90).
  • BPS showed excellent stability and reusability over three cycles.

Conclusions:

  • Biogenically recovered metal(loid) sulfides are effective and sustainable solar photocatalysts.
  • This method offers a circular economy approach for waste valorization.
  • BPS presents a promising solution for Rhodamine B removal and water remediation.