Influence of inorganic ions and selected emerging contaminants on the degradation of Methylparaben: A sonochemical approach

Sasi, Subha; Rayaroth, Manoj P.; Devadasan, Dineep; Aravind, Usha K.; Aravindakumar, Charuvila T.

doi:10.1016/j.jhazmat.2015.06.072

Cited by 71 publications

(33 citation statements)

References 53 publications

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“…There have been several techniques, especially mass spectrometric technique for the identification of the oxidation products. The most common method applied for the identification of degraded products is liquid chromatography-based techniques such as liquid chromatography mass spectrometry (Hisaindee et al 2013), time-of-flight mass spectrometry and hybrid quadrupole time of flight, in combination with ultrahigh-performance liquid chromatography (Menachery et al 2015;Sasi et al 2015). Since most of the species are in the aqueous phase and contains polar groups, therefore gas chromatography-based technique is applied very rarely (Hisaindee et al 2013).…”

Section: Sonoelectrochemical Methodsmentioning

confidence: 99%

“…Recently, various positional isomers, formed during the oxidation reaction, have been differentiated by this technique (Menachery et al 2015;Sreekanth et al 2014). The influence of some micropollutants on the degradation of methylparaben has also been investigated by this high-resolution mass spectrometric technique (Sasi et al 2015). The advantage of using this technique over other mass spectrometric technique is in the identification of unknown compound as it offers the elemental composition and the possible structure from the software itself (Rayaroth et al 2015b).…”

Section: Sonoelectrochemical Methodsmentioning

confidence: 99%

“…Thus, the hydrophobic substances can undergo easy degradation. Some stable compounds are reported to undergo hydrolysis here due to the high temperature (Sasi et al 2015). The recombination of Á OH takes place in this region to produce H 2 O 2 and gets released into the liquid region.…”

Section: Physicochemical Properties Of Pharmaceuticals and The Reactimentioning

confidence: 97%

“…In this method, the in situ formed hydroxyl radical (the key species) favors the aqueous-phase oxidation of organic compounds to form less toxic compounds followed by the complete conversion to CO 2 , water and other inorganic ions. The major advanced oxidation processes reported for the removal of pharmaceutical and personal care products are UV-H 2 O 2 photolysis, ozonolysis, Fenton, photo-Fenton, electro-Fenton, photocatalysis and sonolysis (Andreozzi et al 1999;Biard et al 2011;Feng et al 2013;Rayaroth et al 2015a;Sasi et al 2015;Sunil Paul et al 2014). The general reaction mechanism is…”

Section: The Ecotoxicity Of the Selected Pharmaceutically Active Compmentioning

confidence: 99%

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Degradation of pharmaceuticals by ultrasound-based advanced oxidation process

2016

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Water pollution by pharmaceutically active compounds is an emerging issue. Toxicological studies reveal that pharmaceuticals are indeed toxic for living organisms. The lack of suitable treatment technology for the complete removal of pharmaceuticals is therefore a major challenge. Advanced oxidation processes are emerging removal techniques that have many advantages versus conventional technologies. Many studies indicate that advanced oxidation processes, either in single or in combination with other degradation techniques, can enhance the degradation of pharmaceuticals in aqueous solutions. Here, we review the degradation of pharmaceuticals by sonolysis, an oxidation processes using ultrasound. In this technique, hydroxyl radicals are generated by pyrolytic cleavage of water molecules. We review the influence of operational parameters, additives and hybrid techniques on the degradation of pharmaceuticals. The maximum degradation of organic compounds was observed in the frequency range of 100-1000 kHz, which is in the high-frequency medium-power ultrasound. Even though almost all the experiments presented more than 90 % removal and good biodegradability of the target compound, good mineralization and the toxicity removal were hardly achieved. The efficiency of the degradation varies with water matrixes and varying pH. Major pathways of degradation are hydroxylation, dehalogenation, demethylation, decarboxylation, deamination, etc. More hybrid techniques have to be developed to scale up the application of ultrasound.

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Section: Sonoelectrochemical Methodsmentioning

confidence: 99%

Section: Sonoelectrochemical Methodsmentioning

confidence: 99%

Section: Physicochemical Properties Of Pharmaceuticals and The Reactimentioning

confidence: 97%

Section: The Ecotoxicity Of the Selected Pharmaceutically Active Compmentioning

confidence: 99%

See 2 more Smart Citations

Degradation of pharmaceuticals by ultrasound-based advanced oxidation process

2016

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“…Among the most researched EDCs, parabens are a very common class of preservatives and stabilizing agents widely used in many industrial sectors such as food products and pharmaceutical industries and in health and personal care products (HPC: health and personal care) and are considered as an emerging contaminants. [1,5] Chemically, they are esters derived from p-hydroxybenzoic acid with an alkyl or benzyl group and the ones most frequently used are methylparaben, which is more hydrophilic, and butylparaben, the most soluble. [4][5] Furthermore, the presence of these compounds has been noticed in breast tumors and numerous studies have related their uses to the occurrence of breast cancer, allergic contact, dermatitis and male sterility because they are easily absorbed by the human body.…”

Section: Introductionmentioning

confidence: 99%

A Boron‐Doped Diamond Anode for the Electrochemical Removal of Parabens in Low‐Conductive Solution: From a Conventional Flow Cell to a Solid Polymer Electrolyte System

et al. 2020

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Solution conductivity plays a fundamental role for the employment of electrochemical advanced oxidation processes (EAOPs) and in the determination of their energy consumption. In this paper, a conventional flow cell based on a boron‐doped diamond (BDD) anode that requires the addition of supporting electrolyte, is compared with a cell setup based on solid polymer electrolyte (SPE). The new cell configuration avoids the addition of salt to increase solution conductivity. The performances of the two systems are compared for the treatment of different solutions containing methylparaben, ethylparaben and propylparaben. Both systems are able to remove all the three parabens, but the SPE‐system provided a better performance, with a maximum COD removal of 91 % and energy consumption of 16.25 kWh m−3, whereas the conventional system can remove a maximum of 81 % consuming 10.92 kWh m−3. The influences of parameters such as current density, flow conditions and supporting electrolyte concentration were analyzed, and results confirm that the SPE system is a promising system to treat low‐conductive solutions polluted by parabens.

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Phosphorus‐Doped Porous Carbon Coated Graphite Felt as An Efficient and Reusable Cathode for Electro‐Fenton Degradation of Parabens

et al. 2023

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Pharmaceuticals and personal care products (PPCPs) are currently drawing significant attention due to their environmental impact. Electro‐Fenton, one of the advanced oxidation processes (AOPs), is an efficient and comprehensive technology to degrade all kinds of organic pollutants, but the degradation efficiency relies on cathode material. In this work, phosphorus‐doped porous carbon material coated graphite felt (P‐GF) was prepared by adopting phytic acid as a phosphorus source through high temperature solid‐state method. The microstructure and the elements composition of this fabricated material were investigated by SEM, BET and XPS. With phosphorus doping and plenty of carbon porous structures, the hydrophilicity and infiltrating property of the P‐GF had been greatly improved. The prepared P‐GF material enhanced the electrochemical reduction of O2 and could significantly enhance the yield of H2O2. It was used as a cathode to degrade pollutants under a constant potential, and methylparaben (MePa) was chosen as a research model for optimizing the experimental conditions and analyzing the possible degradation pathway. The P‐GF cathode achieved an excellent ability of degrading nearly 100 % of methylparaben within 3 h. The simultaneous removal ability of the P‐GF to four parabens was impressed. Additionally, the P‐GF material exhibited outstanding reusability.

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Influence of inorganic ions and selected emerging contaminants on the degradation of Methylparaben: A sonochemical approach

Cited by 71 publications

References 53 publications

Degradation of pharmaceuticals by ultrasound-based advanced oxidation process

Degradation of pharmaceuticals by ultrasound-based advanced oxidation process

A Boron‐Doped Diamond Anode for the Electrochemical Removal of Parabens in Low‐Conductive Solution: From a Conventional Flow Cell to a Solid Polymer Electrolyte System

Phosphorus‐Doped Porous Carbon Coated Graphite Felt as An Efficient and Reusable Cathode for Electro‐Fenton Degradation of Parabens

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