Performance of an indigenous integrated slurry photocatalytic membrane reactor (PMR) on the removal of aqueous phenanthrene (PHE)

In this study, a slurry photocatalytic membrane reactor (PMR) was developed and evaluated for the degradation of aqueous phenanthrene (PHE). During continuous process with a hydraulic retention time (HRT) of 140 min, the maximum PHE degradation and total organic carbon (TOC) removal efficiencies wer...

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Bibliographic Details
Published in:Water science and technology 2018-06, Vol.77 (11-12), p.2642-2656
Main Authors: Rani, C Nirmala, Karthikeyan, S
Format: Article
Language:English
Subjects:
Analytical methods
Atomic force microscopy
Bisphenol A
Chemical engineering
Degradation
Efficiency
Electron microscopy
Fluorine
Fouling
Hazardous materials
Hydraulic retention time
Intermediates
Membrane processes
Membrane separation
Membranes
Molecular weight
Operating costs
Organic carbon
Oxidation
Phenanthrene
Photocatalysis
Photodegradation
Pollutants
Polycyclic aromatic hydrocarbons
Reactors
Removal
Researchers
Retention time
Scanning electron microscopy
Slurries
Slurry reactors
Spectroscopy
Titanium dioxide
Total organic carbon
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Summary:In this study, a slurry photocatalytic membrane reactor (PMR) was developed and evaluated for the degradation of aqueous phenanthrene (PHE). During continuous process with a hydraulic retention time (HRT) of 140 min, the maximum PHE degradation and total organic carbon (TOC) removal efficiencies were found to be 97% and 79%, respectively. The reuse and recovery potential of TiO was studied with continuous recycling. The major intermediates during photodegradation of PHE were found to be phenanthrenequinone, phenanthenol and fluorine. This study also includes an investigation of membrane fouling caused by hydrophilic nano TiO . The cake layer observed on the membrane surface was characterized by scanning electron microscopy (SEM), atomic force microscopy (AFM) and energy dispersive spectroscopy (EDS). In addition, the effect of operating parameters such as pH and permeate flux on membrane fouling were also investigated. Low permeate flux and alkaline conditions reduced membrane fouling.
ISSN:0273-1223
1996-9732
DOI:10.2166/wst.2018.220