Use of Salicylic Acid as a Model Compound to Investigate Hydroxyl Radical Reaction in an Ozonation–Membrane Filtration Hybrid Process

Karnik, Bhavana S.; Davies, Simon H.; Baumann, Melissa J.; Masten, Susan J.

doi:10.1089/ees.2006.0156

Cited by 38 publications

(21 citation statements)

References 28 publications

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“…(2014) [1][2][3][4][5][6][7][8][9][10][11] www.deswater.com doi: 10.1080/19443994.2014.992970 The Fenton system uses ferrous ion to react with hydrogen peroxide, producing hydroxyl radicals with powerful oxidizing ability to degrade organic pollutants as shown in Eqs. (1)(2)(3)(4) [10,11].…”

Section: Desalination and Water Treatmentmentioning

confidence: 99%

“…The net effects of salicylate as a metabolic poison are an increase in metabolic activity with the production of heat, generation of metabolic acidosis and ketoacidosis, and increased glucose utilization [4]. Many different approaches have been proposed to remove SA from aqueous solution such as membrane filtration [5], chemical coagulation/precipitation [6] and biological decomposition [7].…”

Section: Introductionmentioning

confidence: 99%

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Optimization of salicylic acid removal by electro Fenton process in a continuous stirred tank reactor using response surface methodology

George

Gandhimathi

Nidheesh

et al. 2016

Desalination and Water Treatment

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The aim of this work is to apply the response surface methodology (RSM) to optimize several operating conditions that significantly affect the removal of salicylic acid (SA) from aqueous solution by electro Fenton (EF) process. Optimization of the EF process for the removal of 100 mg/L of SA solution was carried out using a face centred central composite design in RSM to investigate the joint influence of four variables (catalyst concentration, pH, voltage and electrolysis time) at three different levels. 70.45% of SA was removed at the optimum catalyst concentration of 5.10 mg/L, pH of 2.42, voltage of 2.70 V and electrolysis time of 6 h. A validation experiment was performed under the operating conditions predicted by the models.

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Section: Desalination and Water Treatmentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimization of salicylic acid removal by electro Fenton process in a continuous stirred tank reactor using response surface methodology

George

Gandhimathi

Nidheesh

et al. 2016

Desalination and Water Treatment

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“…Salicylic acid is a product of the decomposition of aspirin (acetylsalicylic acid), one of the most widely used medicines in the world. At ambient temperature, acetylsalicylic acid is slowly hydrolyzed to salicylic acid and acetic acid [12,13]. 10 Religa et al, 2013 [23] Tang et al, 2009 [24] Feng et al, 2014 [25] Park et al, 2012 [26] Xu at al., 2010 [27] Al-Amoudi at al., 2007 [28] Zeta potential [mV] pH Membrane: HL Figure 1.…”

Section: Introductionmentioning

confidence: 99%

Impact of Advanced Oxidation Products on Nanofiltration Efficiency

Żyłła

Milala

Kamińska

et al. 2019

Water

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The aim of the work was to determine the influence of salicylic acid (SA) oxidation products on the effectiveness of their further removal in the membrane filtration process. Two commercial polyamide-based polymer membranes, HL (GE Osmonics) and TS80 (TriSepTM), were used and characterized by SEM microscopic analysis, contact angles, and free surface energy. The products of salicylic acid oxidation, 2,3- and 2,5-dihydroxybenzoic acid and catechol, were determined and their impact on the removal of unreacted salicylic acid in the nanofiltration process was investigated. It was also checked to what extent and why they were retained or not by the membranes. The results of the research have shown that the main product of salicylic acid oxidation, 2,3-dihydroxybenzoic acid, has a negative impact on the retention of salicylic acid in the nanofiltration stage, while the other product, catechol, improves SA retention. The determined values of contact angles correlate well with solubility (S) of the tested compounds, which increases in the following order SSA < S2,3-DHBA < SCAT, while the contact angle of the membrane decreases. Nevertheless, it has been shown that some oxidation products can penetrate the environment due to poorer membrane separation properties of these products.

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“…Ceramic membranes have more advantages than polymeric membranes to combine with ozonation of thermally, chemically mechanical stable, longer lifetimes [20,21], and most importantly, the ozone resistant [22]. The use of hybrid ozonation-ceramic membrane can efficiently reduce membrane fouling.…”

Section: Introductionmentioning

confidence: 99%

Application of airlift ceramic ultrafiltration membrane ozonation reactor in the degradation of humic acids

Mei

Zhang

et al. 2015

Desalination and Water Treatment

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2015) Application of airlift ceramic ultrafiltration membrane ozonation reactor in the degradation of humic acids, Desalination and Water Treatment, 56:2, 285-294, A novel airlift reactor for the removal and degradation of humic acids (HAs) was presented and employed, combining a ceramic membrane reactor with a pressurized ozonation process. The degradation of organic matter was enhanced since HA could be effectively rejected in the reactor by adopting TiO 2 ultrafiltration membrane with an average pore size of 5.5 nm. Ozone was pressurized into the reactor to improve both the reaction and the separation processes. In addition, the application of compressed gaseous ozone can alleviate membrane fouling by reaction with HAs to reduce the thickness of filter cake. Thanks to the effective retention and catalytic ozonation of the TiO 2 membrane, the removal rate of COD Cr and TOC increased to 91.0, 70.0% from 61.0, 36.5%, respectively, compared with a conventional airlift reactor. Further, the ratio of BOD 5 /COD increased to 0.52 from 0.01, which means the biodegradability of the feed solution was significantly improved with the reactor, thus it could play an important role in improving the efficiency of water treatment and reducing the cost of downstream biological steps.

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Use of Salicylic Acid as a Model Compound to Investigate Hydroxyl Radical Reaction in an Ozonation–Membrane Filtration Hybrid Process

Cited by 38 publications

References 28 publications

Optimization of salicylic acid removal by electro Fenton process in a continuous stirred tank reactor using response surface methodology

Optimization of salicylic acid removal by electro Fenton process in a continuous stirred tank reactor using response surface methodology

Impact of Advanced Oxidation Products on Nanofiltration Efficiency

Application of airlift ceramic ultrafiltration membrane ozonation reactor in the degradation of humic acids

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