Comparative evaluation of ibuprofen removal by UV/H2O2 and UV/S2O82− processes for wastewater treatment

Kwon, Minhwan; Kim, Seonbaek; Yoon, Yong Jin; Jung, Youmi; Hwang, Tae Mun; Lee, Junghyang; Kang, Joon Wun

doi:10.1016/j.cej.2015.01.125

Cited by 162 publications

(50 citation statements)

References 55 publications

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“…The photodegradation experiments were carried out using a bench-scale quasi-collimated beam apparatus [15] equipped with two 11-W low-pressure lamps (Philips, Amsterdam, The Netherland), which primarily emit light at 253.7 nm. A 50 mL geosmin and 2-MIB aliquot was placed in a Petri dish at a depth of about 0.786 cm [15][16][17]. The solution was stirred using a cross-shaped stirring bar with a diameter of 1 cm to ensure that it was homogenously exposed to UV light, and the solution is well mixed in the system.…”

Section: Lab-scale Experimentsmentioning

confidence: 99%

“…The solution was stirred using a cross-shaped stirring bar with a diameter of 1 cm to ensure that it was homogenously exposed to UV light, and the solution is well mixed in the system. The UV irradiance (mW/cm 2 ) was determined using the peroxide actinometry method with a calibrated radiometer equipped with a UV 254 detector (UVX Radiometer; UVP, Upland, CA, USA) at the height of the surface of the Petri dish [15,17]. The average incident irradiance across the surface of the solution was determined using a Petri factor and a reflection factor [15].…”

Section: Lab-scale Experimentsmentioning

confidence: 99%

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Removal of Algae, and Taste and Odor Compounds by a Combination of Plant-Mineral Composite (PMC) Coagulant with UV-AOPs: Laboratory and Pilot Scale Studies

et al. 2018

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The seasonal occurrence of algae blooms in surface waters remains a common problem, such as taste and odor (T&Os), the risk of disinfection by-products (DBPs), and disturbance to water treatment systems. The coagulation efficiency of plant-mineral composite (PMC) coagulant followed by UV-based advanced oxidation processes (UV-AOPs; UV/H2O2 and UV/Cl2) was evaluated for removal of algae, turbidity, dissolved organic matters, and taste and odor compounds in lab-scale and pilot-scale tests. In the lab-scale test, coagulation process with 20 mg/L of PMC shows high removal efficiency of turbidity (94%) and algae (99%) and moderate removal efficiency of UV254 (51%) and geosmin (46%). The pilot test results also show good removal efficiency of turbidity (64%), chlorophyll-a (96%). After PMC coagulation process, the major water factors, which affected the performance of UV-AOPs (i.e., UV transmittance (85–94%), and scavenging factor (64,998–28,516 s−1)), were notably improved, and further degradation of geosmin and 2-methylisoborneol (2-MIB) was achieved in both lab-and pilot-scale tests of the UV-AOPs. The UV/H2O2 process shows higher removal efficiency of geosmin and 2-MIB than the UV/Cl2 process because of the pH effect. The results confirmed that the PMC-based coagulation followed by UV/H2O2 process could be an effective process for the removal of algae, geosmin, and 2-MIB.

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Section: Lab-scale Experimentsmentioning

confidence: 99%

Section: Lab-scale Experimentsmentioning

confidence: 99%

Removal of Algae, and Taste and Odor Compounds by a Combination of Plant-Mineral Composite (PMC) Coagulant with UV-AOPs: Laboratory and Pilot Scale Studies

et al. 2018

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“…This is because the scavenging effect of HCO 3 À on SO 4 c À was stronger than that of HOc. By calculating the competitive kinetics, the ratio of k OHc,HCO 3 À/k OHc,BP was found to be about 1.53 times higher than that of k OHc,HCO 3 À/k SO 4 c À ,BP ; 40,41 this indicates that HCO 3 À has a stronger scavenging effect on SO 4 c À .…”

Section: Effects Of CL à On 2-bp Degradationmentioning

confidence: 93%

Comparison of the oxidation of halogenated phenols in UV/PDS and UV/H₂O₂ advanced oxidation processes

Liu

Tian

et al. 2020

RSC Adv.

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“…Table 1 shows the kinetics analyses of degradation of various pesticides using TiO 2 photocatalytic processes under different conditions [25,48]. The degradation of organic compounds usually takes place in several steps, involving the generation and destruction of various reaction by-products [ applied to different types of chemical compounds [52,53]. This might explain the larger enhancing effect while using both S2O8 2− and H2O2 combined, because it could provide an opportunity for the different by-products generated to be efficiently degraded under the conditions favorable to it, that is, either SO4 •− or • OH, or both combined.…”

Section: Characteristics Of Synthesized Tio2 Filmsmentioning

confidence: 99%

Exhaustive Photocatalytic Lindane Degradation by Combined Simulated Solar Light-Activated Nanocrystalline TiO2 and Inorganic Oxidants

et al. 2019

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Organochlorine compounds (OCs) are very toxic, highly persistent, and ubiquitous contaminants in the environment. Degradation of lindane, a selected OC, by simulated solar light-activated TiO2 (SSLA-TiO2) photocatalysis was investigated. The film types of the TiO2 photocatalyst were prepared using a dip-coating method. The physical properties of the films were investigated using X-ray diffraction, transmission electron microscopy, and environmental scanning electron microscopy. The SSLA-TiO2 photocatalysis led to a lindane removal of 23% in 6 h, with 0.042 h−1 of an observed pseudo first-order rate constant (kobs). The SSLA-TiO2 photocatalysis efficiency was greatly enhanced by adding hydrogen peroxide (H2O2), persulfate (S2O82−), or both combined, corresponding to a 64%, 89%, and 99% lindane removal in the presence of 200 µM of H2O2, S2O82−, or equimolar H2O2-S2O82−, respectively. The hydroxyl and sulfate radicals mainly participated in lindane degradation, proven by the results of a radical scavenger study. The degradation kinetics were hindered in the presence of the water constituents, indicated by a 61%, 35%, 50%, 70%, 88%, and 91% degradation of lindane in 6 h, using a SSLA-TiO2/S2O82−/H2O2 photocatalysis system containing 1.0 mg L−1 humic acid (HA), or 1 mM of CO32−, HCO3−, NO3−, SO42−, and Cl−, respectively. The TiO2 film demonstrated high reusability during four runs of lindane decomposition experiments. The SSLA-TiO2/S2O82−/H2O2 photocatalysis is very effective for the elimination of a persistent OC, lindane, from a water environment.

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Comparative evaluation of ibuprofen removal by UV/H2O2 and UV/S2O82− processes for wastewater treatment

Cited by 162 publications

References 55 publications

Removal of Algae, and Taste and Odor Compounds by a Combination of Plant-Mineral Composite (PMC) Coagulant with UV-AOPs: Laboratory and Pilot Scale Studies

Removal of Algae, and Taste and Odor Compounds by a Combination of Plant-Mineral Composite (PMC) Coagulant with UV-AOPs: Laboratory and Pilot Scale Studies

Comparison of the oxidation of halogenated phenols in UV/PDS and UV/H₂O₂ advanced oxidation processes

Exhaustive Photocatalytic Lindane Degradation by Combined Simulated Solar Light-Activated Nanocrystalline TiO2 and Inorganic Oxidants

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Comparative evaluation of ibuprofen removal by UV/H2O2 and UV/S2O82− processes for wastewater treatment

Cited by 162 publications

References 55 publications

Removal of Algae, and Taste and Odor Compounds by a Combination of Plant-Mineral Composite (PMC) Coagulant with UV-AOPs: Laboratory and Pilot Scale Studies

Removal of Algae, and Taste and Odor Compounds by a Combination of Plant-Mineral Composite (PMC) Coagulant with UV-AOPs: Laboratory and Pilot Scale Studies

Comparison of the oxidation of halogenated phenols in UV/PDS and UV/H2O2 advanced oxidation processes

Exhaustive Photocatalytic Lindane Degradation by Combined Simulated Solar Light-Activated Nanocrystalline TiO2 and Inorganic Oxidants

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Product

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Comparison of the oxidation of halogenated phenols in UV/PDS and UV/H₂O₂ advanced oxidation processes