Degradation of Bezafibrate with UV/H₂O₂ in Surface Water and Wastewater Treatment Plant Effluent

Abstract

Bezafibrate (BZF), a widely used lipid regulator, is a potential threat to ecosystems and human health in water, and the recent research showed that advanced oxidation processes (AOPs) are much more effective for BZF degradation. In this study, we investigated the photochemical decomposition of BZF in surface water and effluent from waste water treatment plants (WWTP) by UV/H 2 O 2 process. The results showed that the UV/H 2 O 2 process was a promising method to remove BZF at low concentration, generally at mg L À1 level. When initial concentrations reach 100 mg L À1 in the deionized water, >99.8% of BZF could be removed in 16 min under UV intensity of 61.4 mm cm À2 , at the H 2 O 2 concentration of 0.1 mg L À1 , and neutral pH condition. Moreover, BZF degradation was inhibited in this process when humic acid (HA) and inorganic solution anions were added to the deionized water solutions, including chloride, nitrate, bicarbonate, and sulfate, significantly. In the surface water and effluent of WWTP, however, the removal efficiency of BZF was lower than that in the deionized water because of the interference of complex constituents in the surface water and effluent. Some main intermediates at the m/z range of 100-400 were observed by high performance LC-MS (HPLC/MS) and a simple pathway of BZF degradation by UV/H 2 O 2 was proposed.

Comparison of treatment and energy efficiency of advanced oxidation processes for the distillery wastewater

“…This is may be due to the fact that at higher concentration of H 2 O 2 scavenging of HO Á radicals will occur. The similar mechanism has been reported by Yuan et al (2012). The following reaction shows (Gul and Yildirim 2009) hydrogen peroxide scavenging of HO Á radicals.…”

UV/H2O2 Process Under High Intensity UV Irradiation: A Rapid and Effective Method for Methylene Blue Decolorization

“…There are many advantages in the UV/H 2 O 2 process, such as no sludge production, reaction at normal atmospheric temperature and no catalyst separation required 5–7. Furthermore, if the operation is carried out under suitable conditions, the final products are H 2 O, CO 2 and low molecular weight aliphatic acids 3, 8, 9. However, the commercial application of this method for the treatment of aqueous solutions is limited by the long time of the process, especially for samples of high concentration 10–12.…”

Decomposition of Methylene Blue on Transition Metals Doped SnO2 Nanoparticles

“…The good relationship between (f(R)E) n against E implies the direct transmission nature of SnO 2 . Therefore, if a plot of E versus Kubelka-Munk function (f(R)E) n (n ¼ 2) forms a straight line, it can normally be inferred that there is a direct band gap, measurable by extrapolating the straight line to the (f(R)E) 2 3.19, and 3.27 eV, respectively (Tab. 1 and Fig.…”

“…Due to rapid urbanization and industrial development, environmental problem become a serious matter of concern for the scientific community and regulation authorities [1][2][3]. In recent years there has been an extensive interest in developing semiconductor photocatalysts with high activities for environmental applications such as air purification, water disinfection, hazardous waste remediation, and water purification [1][2][3][4][5][6][7]. The photochemistry of semiconductor nanoparticles is a fast growing area, both in terms of research and practical applications [6][7][8][9][10][11][12][13][14].…”