Degradation and intermediates of diclofenac as instructive example for decomposition of recalcitrant pharmaceuticals by hydroxyl radicals generated with pulsed corona plasma in water

Banaschik, Robert; Jablonowski, Helena; Bednarski, Patrick J.; Kolb, Juergen F.

doi:10.1016/j.jhazmat.2017.08.058

Cited by 81 publications

(44 citation statements)

References 46 publications

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“…In some cases, as in the case of diclofenac degradation, the degradation can result in harmful constituents such as phenol derivatives. 28 Pharmaceuticals commonly have aromatic rings which, if not degraded, can form phenolic compounds that are known for their toxicity. 28 Additionally, they could form acids (as in the case of paracetamol degradation 29 ) which could alter environmental conditions causing harm to local organisms.…”

Section: Photocatalysismentioning

confidence: 99%

“…28 Pharmaceuticals commonly have aromatic rings which, if not degraded, can form phenolic compounds that are known for their toxicity. 28 Additionally, they could form acids (as in the case of paracetamol degradation 29 ) which could alter environmental conditions causing harm to local organisms. Another concern with photocatalyst release in the environment arises due to their instability in water.…”

Section: Photocatalysismentioning

confidence: 99%

“…26,27 However, even these energy-intensive methods may not fully decontaminate water from CECs and may result in the generation of harmful byproducts. 28,29 While direct potable reuse water plants feed treated water from the tertiary step to the distribution system located before a drinking water treatment plant, indirect potable reuse plants purposely release it to a natural water source such as a surface water reservoir, river, sea, or groundwater aquifer 19,23,24,30 (Fig. 1).…”

Section: Introductionmentioning

confidence: 99%

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Nano-based adsorbent and photocatalyst use for pharmaceutical contaminant removal during indirect potable water reuse

et al. 2020

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Increasing human activity, including commercial and noncommercial use of pharmaceuticals, personal care products, and agricultural products, has introduced new contaminants that can be challenging to remove with currently available technologies. Pharmaceuticals, in particular, can be especially challenging to remove from the water supply and can pose great harm to people and local ecosystems. Their highly stable nature makes their degradation with conventional water treatment techniques difficult, and studies have shown that even advanced treatment of water is unable to remove some compounds. As such, decontamination of water from pharmaceuticals requires the development of advanced technologies capable of being used in indirect and direct potable water reuse. In this review, we discuss pharmaceutical removal in indirect potable water treatment and how recent advancements in adsorption and photocatalysis technologies can be used for the decontamination of pharmaceutical-based emerging contaminants. For instance, new materials that incorporate graphene-based nanomaterials have been developed and shown to have increased adsorptive capabilities toward pharmaceuticals when compared with unmodified graphene. In addition, adsorbents have been incorporated in membrane technologies, and photocatalysts have been combined with magnetic material and coated on optical fibers improving their usability in water treatment. Advancements in photocatalytic material research have enabled the development of highly effective materials capable of degradation of a variety of pharmaceutical compounds and the development of visible-light photocatalysts. To understand how adsorbents and photocatalysts can be utilized in water treatment, we address the benefits and limitations associated with these technologies and their potential applicability in indirect potable water reuse plants.

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Section: Photocatalysismentioning

confidence: 99%

Section: Photocatalysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Nano-based adsorbent and photocatalyst use for pharmaceutical contaminant removal during indirect potable water reuse

et al. 2020

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“…, H . , H 2 O 2 , and O 3 , which have high oxidizing potential, to break down the dissolved organic contaminants in water through oxidation processes [30][31][32]. Ono and Oda [33] demonstrated that high-voltage plasma through a pulsed streamer corona creates hydrogen radicals (H .…”

Section: Research Articlementioning

confidence: 99%

Degradation of Eosin Y in Water by Corona Treatment with a Dielectric Barrier Discharge Plasma

et al. 2020

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Corona treatment of Eosin Y‐contaminated water by using a dielectric material that covers the ground electrode to avoid spark discharge (causing erosion), reduce charge leakage, and improve the electric field (as stored electrons and charges) was investigated. Elimination of the organic pollutant by gas‐phase discharge above the liquid surface in a point‐to‐plate configuration with multiple needle electrodes was studied. Eosin Y was chosen as model contaminant because of its toxicity and structure that is hard to degrade. Variables such as solution conductivity, dye concentration, pH, air gap, number of needles, and electrode materials were considered. The degree of removal increases with increasing acidity, decreasing concentration, and increasing number of pins.

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“…Pharmaceutical wastes such as anthropogenic contaminants often cannot be easily removed using conventional wastewater treatment and thus accumulate in aquatic media [1,2]. Trace level of pharmaceutical residues have been detected in ground and surface water, which are considered a threat to the environment due to the high public consumption and continuous discharge to the water environment [3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Application of Photocatalytic Falling Film Reactor to Elucidate the Degradation Pathways of Pharmaceutical Diclofenac and Ibuprofen in Aqueous Solutions

et al. 2019

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Diclofenac (DCF) and ibuprofen (IBP) are common pharmaceutical residues that have been detected in the aquatic system. Their presence in the aquatic environment has become an emerging contaminant problem, which has implications for public health. The degradation pathway and identification of transformation products of pharmaceutical residues are crucial to elucidate the environmental fate of photocatalytic decomposition of these pollutants in aqueous media. The degradation process might lead to creation of other possible emerging contaminates. In this study, the degradation of DCF and IBP in aqueous solutions was investigated. To this end, coated TiO2 on a Pilkington Active glass was used as a photocatalyst under UVA illumination, in a planar falling film reactor. Pilkington ActivTM glass was used as a photocatalyst and a falling liquid film generator. Degradation kinetics of both pharmaceuticals followed a pseudo-first-order model. The transformation products of both diclofenac and ibuprofen during the degradation process were detected and identified with gas chromatography–mass spectrometry (GC–MS) and ion chromatography. The results showed that the mineralization rate of both pharmaceuticals through photocatalysis was very low. Low chain carboxylic acids, such as formic, acetic, oxalic, malonic, and succinic acids were the main by-products. A pathway of DCF and IBP degradation was proposed.

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Degradation and intermediates of diclofenac as instructive example for decomposition of recalcitrant pharmaceuticals by hydroxyl radicals generated with pulsed corona plasma in water

Cited by 81 publications

References 46 publications

Nano-based adsorbent and photocatalyst use for pharmaceutical contaminant removal during indirect potable water reuse

Nano-based adsorbent and photocatalyst use for pharmaceutical contaminant removal during indirect potable water reuse

Degradation of Eosin Y in Water by Corona Treatment with a Dielectric Barrier Discharge Plasma

Application of Photocatalytic Falling Film Reactor to Elucidate the Degradation Pathways of Pharmaceutical Diclofenac and Ibuprofen in Aqueous Solutions

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