The advanced oxidation processes of sonolysis (213 kHz), photocatalysis, and a hybrid combination of both (sonophotocatalysis) have been used in the degradation of a representative aromatic carboxylic acid, p-chlorobenzoic acid (PCBA), in ambient air saturated aqueous solutions. The formation of degradation products were monitored quantitatively and qualitatively using HPLC and MS/MS. A kinetic model was used to account for the degradation of the PCBA in the presence of intermediate degradation products and also their formation and subsequent degradation. Under certain experimental conditions a small (20% enhancement) synergistic effect in the degradation rate was evident in the combined process compared with the sum of the individual processes.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/jp203518s | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Selective sensing of picric acid using a Zn(II)-metallacycle: experimental and theoretical validation of the sensing mechanism and quantitative analysis of sensitivity in contact mode detection.
Dalton Trans
September 2024
Department of Chemistry, Birla Institute of Technology and Science, Pilani, Pilani Campus, Rajasthan 333031, India.
A combination of ,',''-tris(3-pyridyl)-1,3,5-benzenetricarboxamide (L1) and -chlorobenzoic acid (HL2) with Zn(NO)·6HO resulted in the formation of a dinuclear metallacycle [ZnL1(L2)(DMF)] (1(DMF)4). In 1(DMF)4, the Zn(II) centre adopts a square pyramidal geometry, while one of the pyridyl N out of the three pyridyl groups in L1 remained uncoordinated. Solvated DMF molecules are present in 1(DMF)4.
View Article and Find Full Text PDFOzone Diffusion through a Hollow Fiber Membrane Contactor for Pharmaceuticals Removal and Bromate Minimization.
Membranes (Basel)
January 2023
IEM, University of Montpellier, CNRS, ENSCM, 34095 Montpellier, France.
Recently, ozonation has been advocated as a solution to tackle emerging contaminants. Hollow fiber membrane contactors (HFMC) have a lower residual ozone concentration than bubble reactors that could limit the formation of potential ozonation by-products, especially bromates that are regulated in drinking water. The aim of this study was to evaluate ozonation with HFMC for pharmaceutical abatement and bromate minimization compared to bubble columns in wastewater.
View Article and Find Full Text PDFOptimizing the preparative capacity of two-dimensional liquid chromatography based on analytes retention behaviors.
J Chromatogr A
February 2023
Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics (Theranostics), School of Pharmacy, Tianjin Medical University, Tianjin (300070), China. Electronic address:
In this work, a solute retention optimization method (SRO) was proposed to exploit the purification potential of two-dimensional liquid chromatography (2D-LC). According to our findings, the complementarity of 2D-LC correlates with some specific impurities. In the two methods used in 2D-LC, the retention order of these impurities and target compound is completely opposite.
View Article and Find Full Text PDFOzonation facilitates the aging and mineralization of polyethylene microplastics from water: Behavior, mechanisms, and pathways.
Sci Total Environ
March 2023
Department of Civil & Environmental Engineering, National University of Singapore, 1 Engineering Drive 2, 117576, Singapore. Electronic address:
Microplastics (MPs) are ubiquitous in the environment, of which 94 % undergo the aging process. Accelerated aging induced by advanced oxidation processes (AOPs) is significant in explaining the formation pathway of secondary MPs and enables possible mineralization. In this study, ozonation coupled with hydrogen peroxide (O/HO), a type of AOPs, was applied for the aging of MPs (polyethylene, PE).
View Article and Find Full Text PDFKinetics and Mechanism of Degradation of Reactive Radical-Mediated Probe Compounds by the UV/Chlorine Process: Theoretical Calculation and Experimental Verification.
ACS Omega
February 2022
SCNU Environmental Research Institute, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Theoretical Chemistry of Environment, South China Normal University, Guangzhou 510006, China.
The UV/chlorine process, by combining chlorination with UV irradiation, has been recently considered as a highly efficient advanced oxidation process (AOP) technology in water treatment. Nitrobenzene (NB), benzoic acid (BA), and -chlorobenzoic acid (CBA) are widely used as model probe compounds in the UV/chlorine system to calculate the second-order rate constants of the specific radical reaction with target contaminates by a competitive kinetics method. A comprehensive understanding of probe compounds' reaction mechanism with reactive radicals is critical for investigation of the UV/chlorine reaction system.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!