The degradation of highly toxic and persistent chlorinated organic compounds by zerovalent metals (ZVMs) has received considerable attention for in situ groundwater remediation. Due to its abundance and low toxicity, iron has been mostly applied for such purposes, despite several limitations, such as rapid surface passivation and little efficacy towards certain contaminants. Given that, we evaluated monometallic zerovalent iron (ZVI), copper (ZVC) and zinc (ZVZ), and bimetallic copper-coated ZVI (ZVI/Cu) and ZVZ (ZVZ/Cu) for anoxic reductive degradation of chlorpyrifos (CP). Two approaches to enhance metal reactivity were investigated: the synthesis of bimetallic particles with copper and the comparison between micro and nanoparticles. All of the tested monometallic and bimetallic particles dechlorinated the target molecule, although complete chlorine removal was not achieved by any metal during the 30-d treatment period. Coating the zerovalent monometallic particles with copper enhanced reactivity. Reactivity was ZVC > ZVZ > ZVI for monometallic particles and ZVZ/Cu > ZVI/Cu for bimetallic microparticles. The analysis of the degradation products indicated the presence of dechlorinated compounds as well as 3,5,6-trichloro-2-pyridinol, a hydrolysis product.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.chemosphere.2019.125461 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Mycosynthesis of zinc sulfide/zinc oxide nanocomposite using Fusarium oxysporum for catalytic degradation of methylene blue dye, antimicrobial, and anticancer activities.
Sci Rep
December 2024
Faculty of Science, Botany Department, Mansoura University, Mansoura, 35516, Egypt.
In the present study, extracellular cell-free filtrate (CFF) of fungal Fusarium oxysporum f. sp. cucumerinum (FOC) species, was utilized to biosynthesize zinc oxide /zinc sulfide (ZnO/ZnS) nanocomposite.
View Article and Find Full Text PDFUnconventional aspects in metal-embedded laser-induced graphene.
Chem Sci
December 2024
Department of Chemistry & Biochemistry, Department of Materials Science & Engineering, California NanoSystems Institute, University of California, Los Angeles Los Angeles CA 90095 USA
Laser-induced graphene (LIG) has gained significant attention, with over 170 publications in 2023 alone. This surge in popularity is due to the unique advantages LIG offers over traditional thermal methods, such as fast, solvent-free, scalable production and its ability to scribe intricate patterns on various substrates, including heat-sensitive materials like plastics. In recent developments, metal-embedded LIG (M-LIG) has expanded the potential applications of LIG, particularly in energy storage, microelectronics, and sensing.
View Article and Find Full Text PDFIntrinsic Coexistence of Miscibility and Segregation in Gold-Silver Nanoalloys.
Small
December 2024
Institute of Light and Matter, University Claude Bernard Lyon 1, CNRS, UMR5306, Villeurbanne, F-69622, France.
Bimetallic nanoparticles are used in numerous applications in catalysis, plasmonics or fuel cell technology. The addition of the second metal to the nanoparticles allows enhancing and fine-tuning their properties by choosing their composition, size, shape and environment. However, the crucial additional parameter of chemical structure within the particle is difficult to predict and access experimentally, even though segregated core-shell structures and random alloys can have drastically different physicochemical properties.
View Article and Find Full Text PDFP , T -odd effects in YbCu, YbAg, and YbAu.
J Chem Phys
December 2024
Van Swinderen Institute for Particle Physics and Gravity, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands.
In this work, the molecular enhancement factors of the P,T-odd interactions involving the electron electric dipole moment (Wd) and the scalar-pseudoscalar nucleon-electron couplings (Ws) are computed for the ground state of the bimetallic molecules YbCu, YbAg, and YbAu. These systems offer a promising avenue for creating cold molecules by associating laser-cooled atoms. The relativistic coupled-cluster approach is used in the calculations, and a thorough uncertainty analysis is performed to give accurate and reliable uncertainties to the obtained values.
View Article and Find Full Text PDFBimetallic CuNi Nanoparticle Formation: Solution Combustion Synthesis and Molecular Dynamic Approaches.
Inorg Chem
December 2024
Division Surface and Corrosion Science, KTH Royal Institute of Technology, 114 28 Stockholm, Sweden.
Nanomaterials are vital in catalysis, sensing, energy storage, and biomedicine and now incorporate multiprincipal element materials to meet evolving technological demands. However, achieving a uniform distribution of multiple elements in these nanomaterials poses significant challenges. In this study, various Cu-Ni compositions were used as a model system to investigate the formation of bimetallic nanoparticles by employing computer simulation molecular dynamics methods and comparing the results with observations from solution-combustion-synthesized materials of the same compositions.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!