Pahontu (Dura), A.M.; Stefan, D.S.; Chiriac, F.L.; Calinescu, I.; Dancila, A.M.; Stefan, M. Enhanced Degradation of Bisphenol A via Ultrasound, Assisted by Chemical Treatment. Sustainability2023, 15, 14058.
Pahontu (Dura), A.M.; Stefan, D.S.; Chiriac, F.L.; Calinescu, I.; Dancila, A.M.; Stefan, M. Enhanced Degradation of Bisphenol A via Ultrasound, Assisted by Chemical Treatment. Sustainability 2023, 15, 14058.
Pahontu (Dura), A.M.; Stefan, D.S.; Chiriac, F.L.; Calinescu, I.; Dancila, A.M.; Stefan, M. Enhanced Degradation of Bisphenol A via Ultrasound, Assisted by Chemical Treatment. Sustainability2023, 15, 14058.
Pahontu (Dura), A.M.; Stefan, D.S.; Chiriac, F.L.; Calinescu, I.; Dancila, A.M.; Stefan, M. Enhanced Degradation of Bisphenol A via Ultrasound, Assisted by Chemical Treatment. Sustainability 2023, 15, 14058.
Abstract
Bisphenol-A (BPA) represents an important co-monomer for obtaining polycarbonate, epoxy resins, flame retardants, in paint, and other chemicals products. Products containing BPA are widely used, and thus, we can find it in the environment: in the air, in the soil, in natural surface water and in sediments, underground water in landfills, and in wastewater. BPA disturbs human and animals’ health. This influences the enzymatic, androgenic, neurological, liver and reproductive systems at different stages of human life: like in fetal stage, children and adults’ stages. Taking these inconveniences into account, it is very important to remove BPA from water. Ultrasonic technology can be considered a verry sustainable and efficient method to remove BPA from water. The advantages of this method is easy to implement on existing water treatment and purification facilities, it does not produce residual compounds that produce sludge, the time required for degradation is of the order of 1-2 hours and the level of degradation is very high. In this work, we presented the studies on the efficiency of ultrasonics under air atmosphere on the degradation of BPA. The influence of the frequency and of some additional compounds such as carbon tetrachloride, FeSO4 7H2O (FS), and ethyl anthraquinone (EAC) was studied. Three different frequencies were used: 1146 KHz, 864 KHz, 580 KHz, at a power of 50 W. It was identified the efficiency of BPA degradation over a period of 60 minutes, with sampling every 15 minutes. Using the LC-MS/MS technique, the degradation compounds were identified that result from the application of ultrasound processes. Pathways of BPA degradation were also proposed.
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