The effect of humic acids on the removal of atrazine from water in a continuous photocatalytic membrane reactor

<div> This paper examines the effect of humic acids (HA) and other solution constituents (Ca2+, Mg2+, Na+), frequently encountered in potable water sources, on the removal of a well-known herbicide, atrazine (ATR), by a laboratory-scale pilot Photocatalytic Membrane Reactor (PMR) system. Experimental results with different HA concentrations, in the presence (or not) of background cations, demonstrate the attainment of steady-state operation with constant degradation efficiencies and controlled membrane fouling phenomena. The excellent performance of the system is attributed to the efficient photocatalytic degradation of the dissolved organics, which is enhanced by steric interactions between the HA-ATR pseudo-complexes and the membrane. The successful laboratory tests hold promise for practical water treatment applications of the proposed PMR system. </div>

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

Water Science & Technology ◽

10.2166/wst.2018.220 ◽

2018 ◽

Vol 77 (11) ◽

pp. 2642-2656 ◽

Cited By ~ 7

Author(s):

C. Nirmala Rani ◽

S. Karthikeyan

Keyword(s):

Membrane Fouling ◽

Membrane Reactor ◽

Membrane Surface ◽

Continuous Process ◽

Permeate Flux ◽

Toc Removal ◽

Recovery Potential ◽

Cake Layer ◽

Alkaline Conditions ◽

Photocatalytic Membrane Reactor

Abstract 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 TiO2 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 TiO2. 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.

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Humic acids removal in a photocatalytic membrane reactor with a ceramic UF membrane

Chemical Engineering Journal ◽

10.1016/j.cej.2015.10.024 ◽

2016 ◽

Vol 305 ◽

pp. 19-27 ◽

Cited By ~ 39

Author(s):

Kacper Szymański ◽

Antoni W. Morawski ◽

Sylwia Mozia

Keyword(s):

Humic Acids ◽

Membrane Reactor ◽

Photocatalytic Membrane Reactor

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Hydrocarbon degradation and separation of bilge water via a novel TiO2-HNTs/PVDF-based photocatalytic membrane reactor (PMR)

RSC Advances ◽

10.1039/c4ra14172e ◽

2015 ◽

Vol 5 (19) ◽

pp. 14147-14155 ◽

Cited By ~ 28

Author(s):

A. Moslehyani ◽

A. F. Ismail ◽

M. H. D. Othman ◽

T. Matsuura

Keyword(s):

Titanium Dioxide ◽

Polyvinylidene Fluoride ◽

Membrane Reactor ◽

Halloysite Nanotubes ◽

Hydrocarbon Degradation ◽

Pvdf Membrane ◽

Bilge Water ◽

Flat Sheet ◽

Photocatalytic Membrane Reactor

This paper focuses on the potential of a novel flat sheet nanocomposite titanium dioxide (TiO2)-halloysite nanotubes (HNTs)/polyvinylidene fluoride (PVDF) membrane as a photocatalytic separator in the photocatalytic membrane reactor (PMR).

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Pd/TiO2 doped faujasite photocatalysts for acetophenone transfer hydrogenation in a photocatalytic membrane reactor

Journal of Catalysis ◽

10.1016/j.jcat.2017.07.015 ◽

2017 ◽

Vol 353 ◽

pp. 152-161 ◽

Cited By ~ 16

Author(s):

Cristina Lavorato ◽

Pietro Argurio ◽

Teresa F. Mastropietro ◽

Giuseppe Pirri ◽

Teresa Poerio ◽

...

Keyword(s):

Membrane Reactor ◽

Transfer Hydrogenation ◽

Photocatalytic Membrane Reactor

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Reducing ultrafiltration membrane fouling during potable water reuse using pre-ozonation

Water Research ◽

10.1016/j.watres.2017.08.030 ◽

2017 ◽

Vol 125 ◽

pp. 42-51 ◽

Cited By ~ 47

Author(s):

Hui Wang ◽

Minkyu Park ◽

Heng Liang ◽

Shimin Wu ◽

Israel J. Lopez ◽

...

Keyword(s):

Membrane Fouling ◽

Water Reuse ◽

Potable Water ◽

Ultrafiltration Membrane ◽

Ultrafiltration Membrane Fouling

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Performance and Mechanisms of Ultrafiltration Membrane Fouling Mitigation by Coupling Coagulation and Applied Electric Field in a Novel Electrocoagulation Membrane Reactor

Environmental Science & Technology ◽

10.1021/acs.est.7b01189 ◽

2017 ◽

Vol 51 (15) ◽

pp. 8544-8551 ◽

Cited By ~ 34

Author(s):

Jingqiu Sun ◽

Chengzhi Hu ◽

Tiezheng Tong ◽

Kai Zhao ◽

Jiuhui Qu ◽

...

Keyword(s):

Electric Field ◽

Membrane Fouling ◽

Applied Electric Field ◽

Membrane Reactor ◽

Ultrafiltration Membrane ◽

Fouling Mitigation ◽

Ultrafiltration Membrane Fouling

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Membrane Separation Coupled with Photocatalysis for Water Supply and Wastewater Treatment

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.671-674.2571 ◽

2013 ◽

Vol 671-674 ◽

pp. 2571-2574 ◽

Cited By ~ 1

Author(s):

Zhi Yang Wang ◽

Ling Wang ◽

Lin Fei Yao ◽

Mei Le Pei ◽

Guo Liang Zhang

Keyword(s):

Wastewater Treatment ◽

Water Supply ◽

Membrane Reactor ◽

Membrane Separation ◽

Hybrid Technology ◽

The Past ◽

Continuous Running ◽

Photocatalytic Membrane Reactor

Membrane separation coupled with photocatalysis process, which is also called photocatalytic membrane reactor (PMR), is a new hybrid technology working for water supply and wastewater treatment. Due to some unique advantages, such as nontoxic and continuous running, this kind of novel coupling systems has developed rapidly in the past few years. In this work, the characteristic and structure of configurations, photocatalysts and membranes are analyzed briefly.

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Decoloring Methyl Orange under Sunlight by a Photocatalytic Membrane Reactor Based on ZnO Nanoparticles and Polypropylene Macroporous Membrane

International Journal of Polymer Science ◽

10.1155/2013/451398 ◽

2013 ◽

Vol 2013 ◽

pp. 1-8 ◽

Cited By ~ 4

Author(s):

Bing Hu ◽

Jin Zhou ◽

Xiu-Min Wu

Keyword(s):

Methyl Orange ◽

Zinc Oxide Nanoparticles ◽

Membrane Reactor ◽

Membrane Surface ◽

Oxide Nanoparticles ◽

Hydroxyethyl Methacrylate ◽

Water Fluxes ◽

Zno Nps ◽

Hydrophobic Membrane ◽

Photocatalytic Membrane Reactor

Decoloring methyl orange (MeOr) under sunlight was conducted in a photocatalytic membrane reactor (PMR). Zinc oxide nanoparticles (ZnO NPs) were suspended in the solution or immobilized on the membrane. The membrane was modified by grafting 2-hydroxyethyl methacrylate (HEMA) to enhance the adsorption of ZnO NPs on the hydrophobic membrane surface and improve the membrane permeability. The results show that the water fluxes through the modified membranes are higher than that through the unmodified membrane. After introducing ZnO NPs to the membrane, the water fluxes still rise with the immobilization degree of ZnO NPs. For the PMR with ZnO NPs in suspension, the photocatalytic decoloration percent (PDP) was over 98.2% after 40 min under sunlight. For the PMR with ZnO NPs immobilized on the membrane, the max of PDP was 74.3% after 6 h under sunlight, and maintained at 72% after repeated uses for five times. These results demonstrate that photocatalytic membrane reactor (PMR) based on ZnO NPs and polypropylene macroporous membrane(PPMM) could be applied in decoloring dyes.

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