Tannic-membrane interactions on ultrafiltration of cork processing wastewaters

Minhalma, Miguel; Pinho, Maria Norberta de

doi:10.1016/s1383-5866(00)00169-6

Cited by 47 publications

(47 citation statements)

References 11 publications

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“…Minhalma and de Pinho [6,7] studied the membrane technology (ultrafiltration) for the treatment of wastewater from cork processing industries aim at color removal or reduction of chemical oxygen demand as the result of organic matter retention. However, this treatment leads to severe problems of membrane fouling and drastic permeate flux decline.…”

Section: Introductionmentioning

confidence: 99%

Integrated Fenton’s reagent—coagulation/flocculation process for the treatment of cork processing wastewaters

Peres

Heredia

Domínguez

2004

Journal of Hazardous Materials

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Section: Introductionmentioning

confidence: 99%

Integrated Fenton’s reagent—coagulation/flocculation process for the treatment of cork processing wastewaters

Peres

Heredia

Domínguez

2004

Journal of Hazardous Materials

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“…The structure of the compounds present is similar in many industrial effluents and residues like those produced in wine-distillery, olive oil extraction, green olive debittering, cork preparation, wood debarking and coffee production (Field and Lettinga, 1991;Borja et al 1993;Brand et al 2000;Lesage-Meessen et al 2001;Minhalma and de Pinho, 2001;Aggelis et al 2002).…”

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confidence: 99%

Biodegradation of natural phenolic compounds as single and mixed substrates by Fusarium flocciferum

Mendonça¹,

Martins²,

Anselmo³

2004

Electron. J. Biotechnol.

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The mycelium of Fusarium flocciferum was assayed for its ability to degrade aromatic compounds, namely, gallic, protocatechuic, vanillic, syringic, caffeic, and ferulic acids and syringic aldehyde, commonly found in agro-industrial wastes. The biodegradation assays were performed in liquid medium with the phenolic compounds as single substrates and as a synthetic mixture containing the seven aromatic compounds. The results with single substrates indicated that in 24 hrs of incubation the fungus was able to reduce the phenolic concentration from 200 mg/l to below detection limits, except for syringic acid, being the lowest degradation rates found for this acid and its aldehyde. The biodegradation experiments with the mixture of phenolic compounds showed that after 8 hrs the total phenolic concentration was reduce from 350 mg/l to below the detection limits of all the tested compounds. In all the experiments a rise in the pH and an effective detoxification of the phenolic solutions were also observed.

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“…Among others, the major phenolic compounds present in cork wastewater are gallic acid, protocatechuic acid, vanillic acid and syringic acid [14,15]. Phenolic compounds belong to one of the largest groups of environmental pollutants due to their wide applications in agro-industrial wastewaters (from cork and others such as olive oil mills and wine distilleries) and as antimicrobial agents [16].…”

Section: Introductionmentioning

confidence: 99%

Degradation of phenolic acids by gamma radiation as model compounds of cork wastewaters

Madureira¹,

Barros

Melo³

et al. 2018

Chemical Engineering Journal

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• The radiolytic degradation of four phenolic compounds from cork wastewaters was studied under different pH and atmospheres.• The degradation of the compounds was more evident in isolated than in the mixture solutions.• In the quaternary mixture, it were achieved higher degradation rates under irradiation with N 2 O.• Some of the compounds are a degradation product of the others.• 2,3,4-Trihydroxybenzoic acid and methyl gallate were identified as radiolytic products of the phenolic acids. G R A P H I C A L A B S T R A C T A R T I C L E I N F O Keywords:Phenolic acids Gamma radiation Radiolytic degradation Cork wastewaters A B S T R A C TThe degradation by gamma radiation of four phenolic compounds (gallic acid, protocatechuic acid, vanillic acid and syringic acid) present in cork wastewaters was studied in several treatment conditions. The irradiations were performed under different pH (natural, 3, 7 and 10) and atmospheres (aerated, N 2 O and O 2 ) for isolated and aqueous mixture solutions of standard phenolic acids. The degradation of the compounds was higher in isolated than in the mixture solutions indicating a protective effect in the quaternary mixture solution. The saturation with N 2 O promoted the highest degradation rates for all phenolic acids in the mixture. However, at natural pH and in air it was achieved degradation efficiencies > 50% for gallic, vanillic and syringic acids in isolated and mixture solutions for a treatment dose of 20 kGy. It was verified that some of the compounds are a degradation product of the others, for example gallic acid was found to be a radiolytic product of syringic, vanillic and protocatechuic acids. Two different compounds were identified as radiolytic products of the studied phenolic acids, and their fragmentation pathways were proposed. The results highlighted that ionizing radiation could be used as clean technology for pollutants degradation using doses of 20 kGy.

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Tannic-membrane interactions on ultrafiltration of cork processing wastewaters

Cited by 47 publications

References 11 publications

Integrated Fenton’s reagent—coagulation/flocculation process for the treatment of cork processing wastewaters

Integrated Fenton’s reagent—coagulation/flocculation process for the treatment of cork processing wastewaters

Biodegradation of natural phenolic compounds as single and mixed substrates by Fusarium flocciferum

Degradation of phenolic acids by gamma radiation as model compounds of cork wastewaters

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