Pyrolysis Temperature’s Impact on Biochar/CuNi Catalysts for Pollutant Degradation

The study examines how pyrolysis temperatures (500-900°C) affect sugarcane pulp bagasse biochar/CuNi composites for pollutant degradation. Findings reveal optimal catalytic performance at 500°C, enhancing pollutant degradation in wastewater treatment, highlighting biochar/CuNi’s potential as a multifunctional catalyst for environmental remediation.

May 28, 2024

1–2 minutes

Tang, et al (2024) PyrolysisPyrolysis is a thermochemical process that converts waste biomass into bio-char, bio-oil, and pyro-gas. It offers significant advantages in waste valorization, turning low-value materials into economically valuable resources. Its versatility allows for tailored products based on operational conditions, presenting itself as a cost-effective and efficient More temperature effect on the efficacy of biocharBiochar is a carbon-rich material created from biomass decomposition in low-oxygen conditions. It has important applications in environmental remediation, soil improvement, agriculture, carbon sequestration, energy storage, and sustainable materials, promoting efficiency and reducing waste in various contexts while addressing climate change challenges. More/CuNi composite catalysts for emerging pollutant degradation. *Surfaces & Interfaces.* https://doi.org/10.1016/j.surfin.2024.104446

Researchers have investigated the effects of pyrolysis temperature on biochar composites for pollutant degradation. The study focuses on biochar derived from sugarcane pulp bagasse (SCPBB) and its copper-nickel (CuNi) composites.

SCPBB was produced at pyrolysis temperatures ranging from 500°C to 900°C under a nitrogen atmosphere. Following pyrolysis, SCPBB was impregnated with Cu and Ni salts, creating SCPBB/CuNi composites. The study explored how different pyrolysis temperatures influenced the physicochemical properties and catalytic performance of these composites.

Key Findings

Nanoparticle Dispersion: Scanning electron microscopy (SEM) revealed that CuNi nanoparticles were uniformly dispersed on the biochar surface, increasing in size with higher temperatures. Above 700°C, nanoparticles were often embedded within the porous biochar matrix.
Functional Groups: Spectroscopic analyses (FT-IR ATR and Raman) showed that surface functional groups and carbonaceous structures were well-preserved, aiding in the composite’s stability and reactivity.
Thermal Stability: Thermogravimetric analysis (TGA) indicated that biochar produced at 500°C lost mass quickly, whereas those produced at 700°C and 900°C demonstrated greater thermal stability. CuNi impregnation further enhanced thermal resistance.
Catalytic Performance: The composites were tested for degrading various pollutants: Malachite Green (a dye), Amoxicillin (a pharmaceutical), and methyl-parabens (personal care products). SCPBB/CuNi produced at 500°C exhibited the best catalytic performance under advanced oxidation processes (AOPs).

The study highlights the potential of SCPBB/CuNi composites as effective multifunctional catalysts for wastewater treatment. The optimal pyrolysis temperature of 500°C significantly enhances the degradation of diverse environmental pollutants, showcasing a promising approach for environmental remediation.