Kinetics of aqueous photocatalytic oxidation of fulvic acids in a photocatalysis-ultrafiltration reactor (PUR)

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Title: Kinetics of aqueous photocatalytic oxidation of fulvic acids in a photocatalysis-ultrafiltration reactor (PUR)
Authors: Fu, J.F.
Ji, Min
Zhao, Y.Q.
Wang, Lizhang
Permanent link: http://hdl.handle.net/10197/3183
Date: Jun-2006
Abstract: The photocatalysis of natural organic matter, fulvic acid (FA), by P25 TiO2 in terms of UV254 and TOC concentrations was investigated in this study. The experiments were conducted in a lab-scale photocatalysis-ultrafiltration reactor (PUR) with TiO2 suspension. Groups of experiments were designed to examine the effects of pH of bulk solution, TiO2 concentration and additives strength as well as light intensity on the degradation of FA. Results from this study revealed that the degradable behaviour of FA can be reasonably described by first-order kinetics. In addition, it was demonstrated that low pH value, increased additives concentration and relative high light intensity were all beneficial parameters for TOC removal. By inspecting the relationship between rate constant (k) and influencing factors, an overall FA oxidation rate kinetic model was established. The utility of the model was demonstrated by the agreement of predictive and experimental results.
Funding Details: Other funder
Type of material: Journal Article
Publisher: Elsevier
Copyright (published version): 2005 Elsevier B.V.
Keywords: Fulvic acid;Kinetic modelling;Photocatalysis;Natural organic matter;Ultrafiltration membrane;Reactor
Subject LCSH: Fulvic acids--Oxidation
Chemical kinetics
Photocatalysis
Ultrafiltration
DOI: 10.1016/j.seppur.2005.11.017
Language: en
Status of Item: Peer reviewed
Appears in Collections:Centre for Water Resources Research Collection
Urban Institute Ireland Research Collection
Critical Infrastructure Group Research Collection
Civil Engineering Research Collection

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