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231224s2016 xx |||||o 00| ||eng c |
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|a 10.1080/09593330.2016.1160959
|2 doi
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|a eng
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| 100 |
1 |
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|a Hamad, Dina
|e verfasserin
|4 aut
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|a Effects of hydrogen peroxide feeding strategies on the photochemical degradation of polyvinyl alcohol
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|c 2016
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|a Date Completed 26.01.2017
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|a Date Revised 07.12.2022
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a The performance of batch and fed-batch photoreactors with that of continuous photoreactor for the treatment of aqueous polyvinyl alcohol (PVA) solutions is compared. Hydrogen peroxide feeding strategies, residence time, and [H2O2]/[PVA] mass ratio are examined for their impacts on the molecular weight distribution (MWD) of PVA and the total organic carbon (TOC) removal. The results prove that a continuous addition of H2O2 during the degradation reaction ensures the utilization of the produced radicals to minimize the oxidant consumption and maximize the TOC removal and the PVA degradation in a short irradiation time. Also, the MWD of PVA is found to be bimodal and shifted towards lower molecular weights with small shoulder peak indicating a progressive disappearance of the higher molecular weight fractions that is in accordance with the random chains scission mechanism. Besides, the hydrogen peroxide feeding strategies are found to have a great effect on the reduction in H2O2 residuals in the effluent
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|a Journal Article
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|a Polyvinyl alcohol
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|a TOC removal
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|a UV/H2O2 process
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|a continuous photoreactor
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|a hydrogen peroxide feeding
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|a molecular weight distribution
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|a Waste Water
|2 NLM
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|a Polyvinyl Alcohol
|2 NLM
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|a 9002-89-5
|2 NLM
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|a Hydrogen Peroxide
|2 NLM
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|a BBX060AN9V
|2 NLM
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| 700 |
1 |
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|a Dhib, Ramdhane
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|4 aut
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1 |
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|a Mehrvar, Mehrab
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Environmental technology
|d 1993
|g 37(2016), 21 vom: 17. Nov., Seite 2731-42
|w (DE-627)NLM098202545
|x 1479-487X
|7 nnas
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| 773 |
1 |
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|g volume:37
|g year:2016
|g number:21
|g day:17
|g month:11
|g pages:2731-42
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|u http://dx.doi.org/10.1080/09593330.2016.1160959
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