Abstract
The study of photocatalytic degradation of phenol was exploited with nano-ZnO as immobilized photocatalysts in a laboratory scale photocatalytic reactor. The photocatalytic degradation mechanism and kinetics of phenol in water were studied using the solid-phase microextraction (SPME) technique. Based on optimized headspace SPME conditions, phenol in water was first extracted by the fibre, which was subsequently inserted into an aqueous system with immobilized photocatalysts (nano-ZnO) exposed to an irradiation source (i.e., ultraviolet A (UVA) lamps). After different irradiation times (5–80 min), four main intermediates of photocatalytic degradation generated on the fibre were determined by GC-MS.
Highlights
Phenolic compounds were a constant concern from the environmental point of view with regard to their toxicity, bioaccumulation, and persistency in the environment
In solidphase microextraction (SPME), the extraction efficiency could be affected by several parameters, for example, the properties of the bre coating, the extraction temperature and the extraction time, the addition of salts or organic solvents to the sample, pH modi cation, agitation of the sample, and the sample volume
E experiments on the SPME optimization were conducted in 20 mL glass vials and 20 mm crimp seals with PTFE coated septa
Summary
Phenolic compounds were a constant concern from the environmental point of view with regard to their toxicity, bioaccumulation, and persistency in the environment. Among this class of compounds, the representative was phenol which was widely used as a raw material in the petrochemical industries and oil re neries. Among AOP, heterogeneous photocatalysis using various semiconductor nanoparticles has been shown to be potentially advantageous and useful for the degradation of wastewater pollutants. Several advantages of this process are: (1) complete mineralization of organic pollutants to CO2, water, and mineral acids, (2) no wastesolid disposal problem, and (3) only mild temperature and pressure conditions are necessary. Qualitative and quantitative analyses were carried out by using SPME a er the study of the in uence of several extraction parameters: bre coating, extraction time, pH value, salinity effect, and presence of catalysts
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
