Degradation of diethyl phthalate (DEP) in aqueous solution using TiO2/UV process

Shang

Desalination and Water Treatment

et al. 2013

2014) Photodecomposition of dimethyl phthalate in an aqueous solution with UV radiation using novel catalysts, Desalination and Water Treatment, 52:16-18, 3377-3383, A B S T R A C TThis study investigates the photolytic and photocatalytic degradation of dimethyl phthalate (DMP) with novel catalysts including the titanium dioxide-coated magnetic poly(methyl methacrylate) (TiO 2 /mPMMA) and platinum-doped TiO 2 /mPMMA microspheres. The experiments under the illumination of ultraviolet (UV) radiation at 185 and 254 nm are conducted to examine the effects of the initial DMP concentration, photocatalyst, and Pt doping on the degradation of DMP and its mineralization efficiency. The photocatalyst and initial DMP concentration are important factors for the degradation of DMP, while the Pt doping has a minor effect. On the other hand, the mineralization efficiency would be significantly accelerated by the presence of photocatalysts and the Pt doping. In addition, it demonstrates the remarkable contribution of UV radiation at 185 nm to the elimination of DMP and intermediates via both direct photolysis and photocatalysis. This study provides useful information about the direct photolytic and photocatalytic degradation of DMP using the novel photocatalysts with the presence of UV radiation at 185 nm.

Section: Desalination and Water Treatmentmentioning

confidence: 99%

Section: Desalination and Water Treatmentmentioning

confidence: 99%

Section: Photolysis and Photocatalytic Degradation Of Dmpmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Photodecomposition of dimethyl phthalate in an aqueous solution with UV radiation using novel catalysts

Shang

Desalination and Water Treatment

et al. 2013

Desalination and Water Treatment

“…Advanced oxidative processes are extremely efficient technologies that can destroy organic [9][10][11][12][13]. Fenton's reaction has proven to be a promising technology in wastewater treatment [14].…”

Section: Introductionmentioning

confidence: 99%

Solar photo-Fenton treatment of petroleum extraction wastewater

Rocha

Dantas

Duarte

et al. 2013

A B S T R A C TThe purpose of this study is to investigate the treatment of petroleum-extraction wastewater by means of a photo-Fenton like process using sunlight as irradiation source. According to the experimental results, a reduction of the wastewater UV absorption spectral intensity indicates that polycyclic aromatic hydrocarbons and aromaticity removal of approximately 92.7 and 96.2%, respectively, were obtained after 7 h of sunlight exposure using 485.3 mmol L À1 of hydrogen peroxide. For the investigated treatment condition, the H 2 O 2 optimum concentration was 485.3 mmol L À1 since an increment in H 2 O 2 concentration did not promote a significant increment in treatment efficiency. H 2 O 2 single oxidation was also important during the photo-Fenton treatment. A moderate level of mineralization was also observed. Finally, photo-Fenton process using sunlight was able to reduce sample acute phytotoxicity by about 50%.

Journal of Hazardous Materials

A comparative study on ozone, hydrogen peroxide and UV based advanced oxidation processes for efficient removal of diethyl phthalate in water

Mansouri

Tizaoui

Geißen

et al. 2019

Self Cite

Several Advanced Oxidation Processes (AOPs) including O3/H2O2, O3/TiO2, O3/activated carbon (AC), O3/Al2O3, O3/Fe 2+ /H2O2 and UV/TiO2 have been investigated and compared for the removal of diethyl phthalate (DEP), an endocrine disrupting compound, in aqueous solutions. Hydroxyl radicals were the main species responsible for DEP degradation and this was supported by computational chemistry calculation, scavenger experiments, and LC/MS/MS analysis. The change of the abundance of reaction products over time was determined. Organic acids as well as anhydride and hydroxylated products were found to accumulate in solution even after long reaction time (2h). Careful choice of the operating parameters (pH, ozone concentration and catalyst dosage) was crucial to achieve enhanced performance of the combined processes above what each oxidant and catalyst can achieve alone. O3/AC process was found to reduce the oxidation efficiency of O3 at high ozone concentrations. Heterogeneous catalytic ozonation with Al2O3 was the most effective process for DEP removal (~100% removal in about 15 min) and based on pseudo-first-order kinetics at pH7, the studied oxidation processes followed the order: O3/Al2O3(0.093min-1)>O3/H2O2/Fe 2+ (0.076min-1)>O3/AC(0.069min-1)>O3/H2O2(0.053min-1)>O3/TiO2(0.050min-1)> O3 alone (0.039min-1)>UV/TiO2(0.009min-1).