Efficiency of H2O2-Modified Ferrite Process for High-Concentration PVA Removal and Magnetic Nanoparticle Formation
Source abstract
Abstract
High-concentration polyvinyl alcohol (PVA) wastewater from 3D printing applications presents significant treatment challenges due to PVA’s water solubility, chemical stability, and resistance to biodegradation. In this study, we investigated the enhanced removal of high-concentration PVA (3–7 g/L) using a modified ferrite process with H2O2 pre-oxidation, while simultaneously exploring the formation and properties of magnetic precipitates. The effects of PVA concentration, reaction conditions, and thermal treatment (100 °C and 650 °C) on the magnetic precipitates were studied through XRD, TEM, FTIR, and magnetic measurements. Results showed that H2O2 pre-oxidation effectively maintained the system pH and improved PVA removal efficiency, achieving a COD reduction of 83% after two-stage treatment for 7 g/L PVA solution. XRD and TEM analyses revealed that precipitates formed at 100 °C consisted of dispersed Fe3O4 nanoparticles within PVA fibrous networks, while calcination at 650 °C led to the formation of rod-like structures and agglomerated particles. The magnetic properties varied significantly with treatment conditions, exhibiting the highest saturation magnetization of 10.30 emu/g for sample calcinated at 100 °C. This study demonstrates the potential of the modified ferrite process for treating high-concentration PVA wastewater while producing recoverable magnetic nanoparticles, providing a dual-function approach to address environmental challenges posed by the 3D printing industry.
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Research context
OpenAlex topics: Electrospun Nanofibers in Biomedical Applications · Membrane Separation Technologies · Advanced Nanomaterials in Catalysis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Applied Materials and Optoelectronic Engineering, National Chi Nan University, Nantou 54561, Taiwan
Funding
National Science and Technology Council, Taiwan
References (42)
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