Speaker
Description
The raising of emergent contaminants is characterized by a detrimental effect on the quality of water, soil and air, affecting the wellbeing of many types of organisms and the difficulty of their degradation by conventional methods. Research about the harmful effects of these substances show that although they cannot be acutely toxic in the early term, there are potential risk against reproductive processes of aquatic lifeforms, cytotoxic and genotoxic effects, high oxidative cell stress, and adverse effects on growth rate. Furthermore, the problem aggravates by the low regulation in both, consumption and residual treatment, and the poor removal efficiency of wastewater treatment plants. One way to make a stand against this alarming situation is the use of an Advanced Oxidation Process (AOP), such as photocatalysis. NaBiO3, a semiconductor catalyst, has been regarded as an ‘excellent’ catalyst for this kind of application in recent years as a result of its outstanding properties including fast charge carrier separation, visible-light absorption and chemical stability. In this research it is presented the photocatalytic performance of NaBiO3 in the remotion of emergent contaminants (Rhodamine B, Ciprofloxacin and Ibuprofen). The synthesis was carried out by a conventional coprecipitation technique using bismuth nitrate (Bi(NO3)3) and sodium hydroxide (NaOH) as Bi and Na sources. X-Ray Diffraction (XRD) and Diffuse Reflectance Spectroscopy (DRS) were performed to characterize the sample. Photocatalysis experiments measured the loss on intensity of the characteristic peaks of the contaminant. Total RhB decolorization was achieved in 90 minutes, meanwhile the ciprofloxacin solution was removed about 50 % in 150 minutes, in contrast, ibuprofen was not degraded due to the oxidation and reduction potentials of NaBiO3.
Reference
W. Wu and & H. Zhou. One-pot preparation of NaBiO3/PNMA composite: surface properties and photocatalytic performance. Applied Surface Science 544 (2021) , 148910 https://doi.org/10.1016/j.apsusc.2020.148910.
This work was supported by
Beca Institucional IPN
Proyecto SIP-IPN 20240713
Proyecto SIP 20240713, Proyecto de Innovación Alumnos y Dirección de Investigación SIP-IPN
| Keywords | sodium bismuthate, emergent contaminants, photocatalysis, environmental remediation |
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