Publications by authors named "A A Oni"

Bitumen-derived petcoke contains significant quantities of vanadium, recoverable from the fly ash formed during combustion. Despite efforts to process vanadium recovery from petcoke, detailed cost information, critical for stakeholders and decision-makers, remains absent in the public domain. To address this gap, we developed data-intensive techno-economic models specifically for vanadium recovery from petcoke fly ash.

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The experimental demonstration of a p-type 2D WSe transistor with a ferroelectric perovskite BaTiO gate oxide is presented. The 30 nm thick BaTiO gate stack shows a robust ferroelectric hysteresis with a remanent polarization of 20 μC/cm and further enables a capacitance equivalent thickness of 0.5 nm in the hybrid WSe/BaTiO stack due to its high dielectric constant of 323.

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Microplastic pollution presents a serious risk to marine ecosystems worldwide, with West Africa being especially susceptible. This study sought to identify the key factors driving microplastic dynamics in the region. Using NASA's Giovanni system, we analyzed environmental data from 2019 to 2024.

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Oxidative stress (OS) is a major concern that impacts the overall health of chickens in modern production systems. It is characterized by an imbalance between antioxidant defence mechanisms and the production of reactive oxygen species (ROS). This literature review aims to provide a comprehensive overview of oxidative stress in poultry production, with an emphasis on its effects on growth performance, immune responses, and reproductive outcomes.

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Article Synopsis
  • Petcoke generated from bitumen upgrading can be a viable source of vanadium, but the potential environmental impact, particularly greenhouse gas (GHG) emissions, needs to be evaluated.
  • A framework was created to assess life cycle GHG emissions for recovering vanadium from petcoke-based fly ash, revealing that the recovery process emits 26.6 kg COeq for each kg of vanadium oxide produced.
  • The findings indicate that the GHG emissions from this petcoke recovery method are about twice as high compared to other production methods, highlighting the need for improvements to make this pathway more environmentally competitive.
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