Hybrid carbon materials: Synthesis, characterization, and application in the removal of pharmaceuticals from water. (October 2021)

• Record Type: Journal Article
• Authors: Kimbi Yaah, Velma Beri; Ojala, Satu; Khallok, Hamza; Laitinen, Tiina; Botelho de Oliveira, Sergio
• Is Part Of: Journal of water process engineering. Volume 43(2021)
• Publication Date: 2021-10
• Subjects: Photocatalysis -- Water treatment -- Emerging pollutants -- Photocatalytic regeneration; Water-supply engineering -- Periodicals; Saline water conversion -- Periodicals; Seawater -- Distillation -- Periodicals; Sanitary engineering -- Periodicals; Sewage -- Purification -- Periodicals; 627
• DOI: 10.1016/j.jwpe.2021.102279
• Languages: English
• ISSNs: 2214-7144

Abstract

Abstract: Hydrothermal carbonization was used to develop novel carbon-based hybrids for the removal of diclofenac and amoxicillin from water. These non-crystalline and partly graphitic materials can be regenerated by photocatalysis. The synthesized materials have beneficial oxygen containing surface functional groups, of which CO were observed only for tungsten-containing hybrid. An interaction between W, C and TiO2 was observed, which could influence the photocatalytic performance. The best performance was observed for W-containing hybrid (HC butox W) at pH 3 (diclofenac photocatalytic degradation of 80% and removal of 93% after 60 min). Significant part of the removal appeared due to precipitation of diclofenac on the hybrid material surface. Removal efficiency was fully recovered after regeneration at pH 7 under uv-B irradiation. With the same hybrid, 10% removal of amoxicillin after 30 min with 42% photocatalytic degradation at non-adjusted pH was reached. In general, tungsten improved the photocatalytic activity of material, while specific surface area played only a minor role. Graphical abstract: Unlabelled Image Highlights: Carbon hybrids with uv-light regeneration ability were developed from waste biomass. 93% removal of diclofenac was achieved in 60 min. 42% removal of amoxicillin was achieved in the best case. Removal efficiency of the hybrid was completely recovered in regeneration.