Photocatalysis and catalytic wet air oxidation: Degradation and toxicity of bisphenol A containing wastewaters.
Buddhika RathnayakeAnne HeponiemiMarjo HuovinenSatu OjalaMinna PiriläJarkko LoikkanenSaïd AzalimMohammed SaouabeRachid BrahmiKirsi VähäkangasLassi UllaRiitta L KeiskiPublished in: Environmental technology (2019)
Bisphenol A (BPA) is a commonly used chemical in consumer products. It is an endocrine disrupter that has potentially significant negative effects on human health. The use and chemical stability of BPA have resulted in the appearance of the chemical in wastewaters. Since the current wastewater treatment technologies are not effective enough to remove BPA, new methods to degrade BPA are required. In this paper, we report the efforts made towards developing a bi-functional catalyst for consecutive catalytic wet air oxidation-photocatalytic water treatment. It was found that 2.5% Pt/Ti0.8Ce0.2O2 is a potential bi-functional catalyst for the consecutive treatment. Concentration and toxicity of BPA were successfully reduced by catalytic wet air oxidation. Although BPA was further reduced by photocatalysis, it was not reflected in further decrease of cell toxicity. Thus wet-air oxidation combined with photocatalysis is a promising approach for the reduction of BPA.
Keyphrases
- visible light
- wastewater treatment
- human health
- risk assessment
- oxidative stress
- hydrogen peroxide
- reduced graphene oxide
- climate change
- healthcare
- room temperature
- cell therapy
- stem cells
- crystal structure
- antibiotic resistance genes
- mesenchymal stem cells
- electron transfer
- combination therapy
- gold nanoparticles
- social media
- oxide nanoparticles