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The effect of ozone on the removal effectiveness of photocatalysis on indoor gaseous biogenic volatile organic compounds.
J Air Waste Manag Assoc. 2010 Jul; 60(7):820-9.JA

Abstract

In this study, the degradation of d-limonene by photocatalytic oxidation (PCO) (titanium dioxide [TiO2]/ultraviolet [UV]) and by the combination of PCO and ozone (O3) (TiO2/UV/O3) was investigated to evaluate the enhancement effect of O3. The degradation of d-limonene by UV/O3 was also investigated for comparison. The experiments were conducted with a quartz photoreactor under various gas flow rates (600-1600 mL min(-1)), d-limonene concentrations (0.5-9 parts per million [ppm]), and relative humidity (RH) (20-80%). The d-limonene removal efficiency of TiO2/UV/O3, TiO2/UV, and UV/O3 ranged from 62 to 99%, from 49 to 99%, and from 46 to 75%, respectively. The addition of 120-ppb O3 can enhance the d-limonene removal efficiency of PCO up to 12%. The apparent kinetic parameters (apparent rate constants, kapparent and Langmuir adsorption constants, Kapparent of TiO2/UV and TiO2/UV/O3 reactions obtained from fitting Langmuir-Hinshelwood models are TiO2/UV: kapparent = 1.45 x 10(-3) ppm-m sec(-1), Kapparent = 0.34 ppm(-1); TiO2/ UV/O3: kapparent = 1.83 x 10(-3) ppm-m sec(-1), and Kapparent = 0.35 ppm(-1). When RH was higher than 40%, the residual intermediates yield rates of d-limonene of TiO2/UV/O3, TiO2/UV, and UV/O3 reactions ranged from 0.39 to 0.51 micromol carbon m(-2) sec(-1), 0.56 to 1.96 micromol carbon m(-2) sec(-1), and 157 to 177 micromol carbon m(-3) sec(-1), respectively. In the photocatalytic reaction experiments, the addition of 120-parts per billion (ppb) O3 can reduce the residual intermediates yield rates of d-limonene by up to 1.46 micromol carbon m(-2) sec(-1). These experimental results showed that O3 can enhance the effectiveness of photocatalysis on the removal of d-limonene.

Authors+Show Affiliations

Institute of Environmental and Occupational Health Sciences, National Yang-Ming University, Taipei, Taiwan, Republic of China.No affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

20681429

Citation

Yu, Kuo-Pin, et al. "The Effect of Ozone On the Removal Effectiveness of Photocatalysis On Indoor Gaseous Biogenic Volatile Organic Compounds." Journal of the Air & Waste Management Association (1995), vol. 60, no. 7, 2010, pp. 820-9.
Yu KP, Lee GW, Huang GH. The effect of ozone on the removal effectiveness of photocatalysis on indoor gaseous biogenic volatile organic compounds. J Air Waste Manag Assoc. 2010;60(7):820-9.
Yu, K. P., Lee, G. W., & Huang, G. H. (2010). The effect of ozone on the removal effectiveness of photocatalysis on indoor gaseous biogenic volatile organic compounds. Journal of the Air & Waste Management Association (1995), 60(7), 820-9.
Yu KP, Lee GW, Huang GH. The Effect of Ozone On the Removal Effectiveness of Photocatalysis On Indoor Gaseous Biogenic Volatile Organic Compounds. J Air Waste Manag Assoc. 2010;60(7):820-9. PubMed PMID: 20681429.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - The effect of ozone on the removal effectiveness of photocatalysis on indoor gaseous biogenic volatile organic compounds. AU - Yu,Kuo-Pin, AU - Lee,Grace Whei-may, AU - Huang,Guo-Hao, PY - 2010/8/5/entrez PY - 2010/8/5/pubmed PY - 2010/9/16/medline SP - 820 EP - 9 JF - Journal of the Air & Waste Management Association (1995) JO - J Air Waste Manag Assoc VL - 60 IS - 7 N2 - In this study, the degradation of d-limonene by photocatalytic oxidation (PCO) (titanium dioxide [TiO2]/ultraviolet [UV]) and by the combination of PCO and ozone (O3) (TiO2/UV/O3) was investigated to evaluate the enhancement effect of O3. The degradation of d-limonene by UV/O3 was also investigated for comparison. The experiments were conducted with a quartz photoreactor under various gas flow rates (600-1600 mL min(-1)), d-limonene concentrations (0.5-9 parts per million [ppm]), and relative humidity (RH) (20-80%). The d-limonene removal efficiency of TiO2/UV/O3, TiO2/UV, and UV/O3 ranged from 62 to 99%, from 49 to 99%, and from 46 to 75%, respectively. The addition of 120-ppb O3 can enhance the d-limonene removal efficiency of PCO up to 12%. The apparent kinetic parameters (apparent rate constants, kapparent and Langmuir adsorption constants, Kapparent of TiO2/UV and TiO2/UV/O3 reactions obtained from fitting Langmuir-Hinshelwood models are TiO2/UV: kapparent = 1.45 x 10(-3) ppm-m sec(-1), Kapparent = 0.34 ppm(-1); TiO2/ UV/O3: kapparent = 1.83 x 10(-3) ppm-m sec(-1), and Kapparent = 0.35 ppm(-1). When RH was higher than 40%, the residual intermediates yield rates of d-limonene of TiO2/UV/O3, TiO2/UV, and UV/O3 reactions ranged from 0.39 to 0.51 micromol carbon m(-2) sec(-1), 0.56 to 1.96 micromol carbon m(-2) sec(-1), and 157 to 177 micromol carbon m(-3) sec(-1), respectively. In the photocatalytic reaction experiments, the addition of 120-parts per billion (ppb) O3 can reduce the residual intermediates yield rates of d-limonene by up to 1.46 micromol carbon m(-2) sec(-1). These experimental results showed that O3 can enhance the effectiveness of photocatalysis on the removal of d-limonene. SN - 1096-2247 UR - https://www.unboundmedicine.com/medline/citation/20681429/The_effect_of_ozone_on_the_removal_effectiveness_of_photocatalysis_on_indoor_gaseous_biogenic_volatile_organic_compounds_ L2 - http://www.tandfonline.com/doi/full/10.3155/1047-3289.60.7.820 DB - PRIME DP - Unbound Medicine ER -