Cobalt-Doped Carbon Aerogel Activated PMS for Methylene Blue Degradation

Abstract

In this investigation, a cobalt-doped carbon aerogel (CoDA), serving as a Peroxymonosulfate activator, was synthesized from durian shell biomass to facilitate the treatment of wastewater containing Methylene Blue (MB). This study could solve the two problems which were durian residues and wastewater. Furthermore, the cobalt-doped carbon aerogel derived from durian shell was a significant innovation in the corporate of these materials for degrading methyl blue. The synthesis employed a hydrothermal approach combined with impregnation and pyrolysis. The CoDA sample underwent comprehensive material analysis, including nitrogen physisorption for porous characterization, Powder X-ray diffraction (XRD) for material identification, and Scanning Electron Microscopy (SEM) for morphological examination. The catalyst, featuring cobalt active sites on a carbon aerogel support, exhibited remarkable efficiency in removing MB when activated with PMS. Under specific of conditions 0.2g catalyst, 100 mL of a 50 ppm MB solution, and 375 mg/L PMS, the MB removal efficiency reached 76.4 % (equivalent to 300.61 mg MB per 1 g of catalyst) within 30 min of reaction. Additionally, the impact of anions (Cl-, SO42-, CO32-, and PO43-) on the MB degradation process was investigated, revealing a reduction in removal efficiency across all cases.