Degradation of bisphenol A: a contaminant of emerging concern, using catalytic ozonation by activated carbon impregnated nanocomposite-bimetallic catalyst

Abstract

Rampant water pollution events and rising water demand caused by exponential population growth and depleting freshwater resources speak of an impending water crisis. The inability of conventional wastewater treatment systems to remove Contaminants of Emerging Concern (CEC) such as Bisphenol-A (BPA) beckons for new and e cient technologies to remove them from wastewater and water sources.Advanced oxidation processes such as ozonation are primarily known for their capability to oxidize and degrade organic entities in water but optimum mineralization levels were hard to achieve. In this study, we synthesized an activated carbon impregnated nanocomposite-bimetallic catalyst (AC/CeO 2 /ZnO) and used it along with ozonation to remove BPA from water. The catalyst was characterized using BET, XRD, FESEM, Raman spectra, and DLS studies. Catalytic ozonation achieved TOC removal 25% higher than non-catalytic ozonation process. The degradation pathway of BPA was proposed using LC-MS/LC-Q-TOF studies that found six main aromatic degradation byproducts. Catalytic ozonation and non-catalytic ozonation followed similar degradation pathways. The formation of persistent aliphatic acidic byproducts in the treated sample made TOC removal above 61% di cult.

Ultrafiltration and Nanofiltration for the Removal of Pharmaceutically Active Compounds from Water: The Effect of Operating Pressure on Electrostatic Solute—Membrane Interactions

“…These contaminants encompass personal care products, pharmaceutically active compounds (PhACs), surfactants, flame retardants, and antibiotic-resistant genes, as well as other non-regulated substances [ 3 , 4 ]. They have been introduced into the environment through the disposal of wastewater [ 5 , 6 ] since conventional treatment processes commonly used in wastewater treatment plants (WWTPs) are not effective in removing these contaminants [ 7 , 8 ].…”

Catalytic oxidation processes for the degradation of Progesterone using V2O5 catalyst and C/Ti anode: Optimization and degradation dynamics

“…Due to higher production of hydroxyl radicals, the amount of current density required for PGT oxidation was less in PC + EC(UV-C) compared to EO. At basic pH, higher production of hydroxide ions might have competitively inhibited the production of hydroxyl radicals resulting in considerable decrease in TOC and COD removal rates at pH 9 [19,37]. Irrespective of the initial pH utilized, nal pH of the treated samples uctuated between 3.2 and 4.2 pointing to the formation of organic acid groups during the oxidation of PGT [15,26,30].…”

Efficient photo-oxidation of bisphenol a and tetracycline through sulfur-doped g-C3N4/CD heterojunctions

“…Among the myriad of CECs, bisphenol A (BPA) 4,5 and tetracycline (TC) [6][7][8] stand out due to their widespread presence and potential adverse effects. BPA, a ubiquitous component of plastic products, 9 and TC, a common antibiotic, are prevalent in various industrial effluents and municipal wastewater streams.…”

“…1,2 These CECs, encompassing a spectrum of pollutants from pharmaceuticals 3 to endocrine disruptors, persist in water sources, posing significant threats to both the environment and human health. Among the myriad of CECs, bisphenol A (BPA) 4,5 and tetracycline (TC) 6–8 stand out due to their widespread presence and potential adverse effects. BPA, a ubiquitous component of plastic products, 9 and TC, a common antibiotic, are prevalent in various industrial effluents and municipal wastewater streams.…”