Photodegradation of bisphenol A in aqueous medium: Monitoring and identification of by‐products by liquid chromatography coupled to high‐resolution mass spectrometry

Abstract

All of these findings indicate that the identification of by-products arising from oxidative treatments is of primary importance because such compounds can be more hazardous than their precursors.

Mass Spectrometric Analysis of Bisphenol A Desorption from Titania Nanoparticles: Ammonium Acetate, Fluoride, Formate, and Hydroxide as Chemical Desorption Agents

“…However, desorbed species may adopt a very different molecular structure than that for BPA, thereby making it very difficult for environmental or food toxicologists to predict its ultimate estrogenic activity without being cytotoxic. Indeed, the identification of by-products arising from adsorption treatments is of primary importance because desorbed compounds can be more hazardous than their precursors [26]. Fortunately, mass spectrometry (MS) can be used to detect desorbed species, possibly together with a proposal of plausible desorption mechanism or pathways involved.…”

“…We aimed to evaluate desorption capabilities of four chemical agents, ammonium acetate (NH 4 AC), fluoride (NH 4 F), formate (NH 4 COOH), and hydroxide (NH 4 OH), and to identify the by-products formed under acid-base, complexometric, oxidative, and photocatalytic desorption conditions. However, this study was not focused on the photocatalytic degradation of BPA since such a process had previously been well studied and reported [22,26]. It was understood that if the polarity was tuned by adding solvents such as acetonitrile or isopropanol into a water sample, BPA could be desorbed but the dilution factor (e.g., for 1:1 v / v of the solvent:water) might not be acceptable in trace analysis.…”

Development and Validation of an HPLC-DAD Method for the Simultaneous Extraction and Quantification of Bisphenol-A, 4-Hydroxybenzoic Acid, 4-Hydroxyacetophenone and Hydroquinone in Bacterial Cultures of Lactococcus lactis

“…The peak that appears at 25.6 ( Figure 1) might be attributed to a BPA photodegradation product, since it was also identified during the photodegradation experiment and is presented in Figure 2. Photodegradation of BPA via photooxidation has been confirmed [10,12], and the products of this process presented higher toxicity than the parent compound [11]. Since the feeding experiments were conducted under normal light, it was deemed appropriate to test if any BPA loss was due to photodegradation.…”

“…Although part of bisphenol is degraded via photo-oxidation [10][11][12], monitoring of its levels is deemed necessary in various environmental sources [13]. To this end, biodegradation has been proposed as an advanced technique for BPA elimination [13][14][15], since a variety of microorganisms have been identified to decompose BPA [15,16].…”

An impact of the copper additive on photocatalytic and bactericidal properties of TiO2 thin films

“…by addition of carbon [15], nitrogen [16] or sulfur [17], which enables reduction of band gap, and therefore shift of the optical response to the visible range [13]. Photocatalytic properties of titanium dioxide are widely used in the process of elimination of toxic chemicals, such as bisphenol A, tetracycline, and sulfamethazile from wastewater [18][19][20].…”