Removal of penicillin G from aqueous phase by Fe+3-TiO2/UV-A process

Abstract

BackgroundAnomalous use of antibiotics and their entrance into the environment have increased concerns around the world. These compounds enter the environment through an incomplete metabolism and a considerable amount of them cannot be removed using conventional wastewater treatment. Therefore, the main objectives of this research are evaluation of the feasibility of using ultraviolet radiation (UV-A) and fortified nanoparticles of titanium dioxide (TiO2) doped with Fe+3 to remove penicillin G (PENG) from aqueous phase and determining the optimum conditions for maximum removal efficiency.ResultsThe results showed that the maximum removal rate of penicillin G occurred in acidic pH (pH = 3) in the presence of 90 mg/L Fe+3-TiO2 catalyst. In addition, an increase in pH caused a decrease in penicillin G removal rate. As the initial concentration of penicillin G increased, the removal rate of antibiotic decreased. Moreover, due to the effect of UV on catalyst activation in Fe+3-TiO2/UV-A process, a significant increase was observed in the rate of antibiotic removal. All of the variables in the process had a statistically significant effect (p < 0.001).ConclusionThe findings demonstrated that the antibiotic removal rate increased by decreasing pH and increasing the amount of catalyst and contact time. In conclusion, Fe+3-TiO2/UV-A process is an appropriate method for reducing penicillin G in polluted water resources.

Photocatalytic degradation of atrazine herbicide with Illuminated Fe+3-TiO2 Nanoparticles

“…Our results agree with those of Bushnqe’s study indicating that higher atrazine removal concentration was observed at higher initial concentration of the herbicide using UV intensity [26]. On the other hand, the results of Dehghani et al on the removal of penicillin G [17] and Hemmati et al on degradation of phenol [13] indicated that the removal efficiency was decreased by increasing the initial concentration. According to data obtained in this research, the removal efficiency of atrazine at different initial concentrations of 10, 1, and 0.1 mg/L was 99.47, 98.97, and 92.65%, respectively.…”

Optimization of Atrazine Degradation in the Aqueous Phase Using Titanium Catalyst Doped With Iron (Fe+3-TiO2) Processes

“…we obtained in the present study, an initial atrazine concentration of 0.1 mg/L is optimal for atrazine degradation (41.72%), because samples with lower initial atrazine concentration have a higher chance of removal (24). Many other studies showed that better removal of atrazine occurred at lower concentrations (30,31 …”

“…Ammonium hydroxide and hydrochloric acid were used to adjust pH in the samples (24). The samples were passed through a Whatman filter cellulose acetate membrane with a pore size of 0.22 microns (Germany).…”

Theoretical study on the adsorption of benzylpenicillin molecule onto vermiculite surface

“…[3] Therefore, studies using efficient technologies, as advanced oxidation, photocatalysis, adsorption of polluted compounds, have been examined widely. [4,5] Notably, adsorption technology based on significant properties of material surface has been paid special attention to scientists. These investigations focused on the adsorption capacity of materials based on their special properties.…”