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Degradation of natural organic matter by TiO2 photocatalytic oxidation and its effect on fouling of low-pressure membranes.
Water Res. 2008 Feb; 42(4-5):1142-50.WR

Abstract

Natural organic matter (NOM) fouling continues to be the major barrier to efficient application of microfiltration (MF) and ultrafiltration (UF) in drinking water treatment. In this study, the potential of TiO2/UV photocatalytic oxidation to control fouling of membranes by NOM was evaluated. Decomposition kinetics of NOM was investigated using a commercial TiO2 catalyst, and the effect of various experimental parameters including TiO2 dosage and initial total organic carbon (TOC) concentration were also determined. The reaction kinetics was found to increase with increasing TiO2 dosage, but decrease with increasing initial TOC concentration. Even though the rate of TOC removal was relatively low, the TiO2/UV process was very effective in controlling membrane fouling by NOM. At a TiO2 concentration of 0.5 g/L, fouling of both an MF and a UF membrane was completely eliminated after 20 min of treatment. Careful analyses of specific UV absorbance (SUVA) and molecular weight (MW) distribution of NOM revealed that the effectiveness in membrane fouling control is the result of the changes in NOM molecular characteristics, namely MW and SUVA due to the preferential removal and transformation of large, hydrophobic NOM compounds. Results from this study show that TiO2/UV photocatalytic oxidation is a promising pretreatment method for MF and UF systems.

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Authors+Show Affiliations

Huang X
Department of Civil and Environmental Engineering, Rice University, 6100 Main Street, Houston, TX 77005, USA.
Leal M
No affiliation info available
Li Q
No affiliation info available

MeSH

CatalysisHumic SubstancesMolecular WeightOxidation-ReductionParticle SizePressureTitaniumUltrafiltrationUltraviolet RaysWater PollutantsWater Purification

Pub Type(s)

Journal Article

Language

eng

PubMed ID

17904191

Citation

Huang, Xianhuai, et al. "Degradation of Natural Organic Matter By TiO2 Photocatalytic Oxidation and Its Effect On Fouling of Low-pressure Membranes." Water Research, vol. 42, no. 4-5, 2008, pp. 1142-50.
Huang X, Leal M, Li Q. Degradation of natural organic matter by TiO2 photocatalytic oxidation and its effect on fouling of low-pressure membranes. Water Res. 2008;42(4-5):1142-50.
Huang, X., Leal, M., & Li, Q. (2008). Degradation of natural organic matter by TiO2 photocatalytic oxidation and its effect on fouling of low-pressure membranes. Water Research, 42(4-5), 1142-50.
Huang X, Leal M, Li Q. Degradation of Natural Organic Matter By TiO2 Photocatalytic Oxidation and Its Effect On Fouling of Low-pressure Membranes. Water Res. 2008;42(4-5):1142-50. PubMed PMID: 17904191.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Degradation of natural organic matter by TiO2 photocatalytic oxidation and its effect on fouling of low-pressure membranes. AU - Huang,Xianhuai, AU - Leal,Marlen, AU - Li,Qilin, Y1 - 2007/09/07/ PY - 2007/05/19/received PY - 2007/08/22/revised PY - 2007/08/28/accepted PY - 2007/10/2/pubmed PY - 2008/6/5/medline PY - 2007/10/2/entrez SP - 1142 EP - 50 JF - Water research JO - Water Res VL - 42 IS - 4-5 N2 - Natural organic matter (NOM) fouling continues to be the major barrier to efficient application of microfiltration (MF) and ultrafiltration (UF) in drinking water treatment. In this study, the potential of TiO2/UV photocatalytic oxidation to control fouling of membranes by NOM was evaluated. Decomposition kinetics of NOM was investigated using a commercial TiO2 catalyst, and the effect of various experimental parameters including TiO2 dosage and initial total organic carbon (TOC) concentration were also determined. The reaction kinetics was found to increase with increasing TiO2 dosage, but decrease with increasing initial TOC concentration. Even though the rate of TOC removal was relatively low, the TiO2/UV process was very effective in controlling membrane fouling by NOM. At a TiO2 concentration of 0.5 g/L, fouling of both an MF and a UF membrane was completely eliminated after 20 min of treatment. Careful analyses of specific UV absorbance (SUVA) and molecular weight (MW) distribution of NOM revealed that the effectiveness in membrane fouling control is the result of the changes in NOM molecular characteristics, namely MW and SUVA due to the preferential removal and transformation of large, hydrophobic NOM compounds. Results from this study show that TiO2/UV photocatalytic oxidation is a promising pretreatment method for MF and UF systems. SN - 0043-1354 UR - https://www.unboundmedicine.com/medline/citation/17904191/Degradation_of_natural_organic_matter_by_TiO2_photocatalytic_oxidation_and_its_effect_on_fouling_of_low_pressure_membranes_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0043-1354(07)00573-8 DB - PRIME DP - Unbound Medicine ER -