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Rapid degradation, mineralization and detoxification of pharmaceutically active compounds in aqueous solution during pulsed corona discharge treatment
Published in Elsevier Ltd
2017
PMID: 28505531
Volume: 121
   
Pages: 20 - 36
Abstract
In the present study, plasma generated by pulsed corona discharge was used for the degradation of diclofenac, carbamazepine and ciprofloxacin. Pollutants in aqueous solution were plasma treated under two categories: single and mixed pollutant condition. Mixed pollutant condition showed an antagonistic behaviour and thus the degradation time was higher for mixed condition compared to the single condition. At different voltage and frequencies, degradation efficiency followed the trend, diclofenac>carbamazepine>ciprofloxacin. Acidic pH slightly favoured the degradation process whereas in presence of radical scavengers (HCO3 −, CO3 2– and humic acid) the degradation yield was significantly decreased. With an input power of 101.5 W, complete degradation was achieved within 4–16 min of plasma treatment for pharmaceutical's concentrations of 1–10 mg/L. As the pollutant concentration increased from 1 to 10 mg/L, the pseudo first order rate constant decreased, while yield increased. Complete degradation pathway of diclofenac, carbamazepine and ciprofloxacin in plasma treatment process are proposed by identifying the intermediates using LC-MS analysis. TOC analysis confirmed 80% mineralization within 10 min of plasma treatment for higher pharmaceutical's concentrations of 10 mg/L. The microalgae ecotoxicity study and disc diffusion test confirmed the complete detoxification of PACs that took place after 6 min of plasma treatment. © 2017 Elsevier Ltd
About the journal
JournalData powered by TypesetWater Research
PublisherData powered by TypesetElsevier Ltd
ISSN00431354
Open AccessNo
Concepts (46)
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    Activated sludge process
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    Amides
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    Antibiotics
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    Degradation
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    Detoxification
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    ELECTRIC CORONA
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    Mineralogy
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    Plasma applications
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    Pollution
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    Rate constants
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    Solutions
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    ANTAGONISTIC EFFECTS
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    DEGRADATION YIELDS
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    Mineralization
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    PULSED CORONA
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    RADICAL SCAVENGERS
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    Electric discharges
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    CARBAMAZEPINE
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    Ciprofloxacin
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    Diclofenac
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    Humic acid
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    Scavenger
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    Water pollutant
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    Aqueous solution
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    Concentration (composition)
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    Corona
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    Drug
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    Microalga
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    pH
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    Pollutant removal
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    SCAVENGING (CHEMISTRY)
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    Article
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    Concentration (parameters)
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    DISK DIFFUSION
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    Drug degradation
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    DRUG DETOXIFICATION
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    Ecotoxicity
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    Electric potential
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    Priority journal
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    PULSED CORONA DISCHARGE TREATMENT
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    TREND STUDY
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    Chemistry
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    Liquid chromatography
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    Mass spectrometry
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    Chromatography, liquid
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    Water pollutants, chemical