探討還原性物質於連續式光催化系統氧化非類固醇抗發炎藥劑影響之研究

林秉蓮

doi:10.6841/NTUT.2012.00482

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探討還原性物質於連續式光催化系統氧化非類固醇抗發炎藥劑影響之研究

Removal of non-steroidal anti-inflammatory drugs (NSAIDs) with different electron scavengers by fluidized TiO2 catalyst bed reactor.

林秉蓮 , Masters　　Advisor：陳孝行　　

繁體中文 DOI： 10.6841/NTUT.2012.00482

對乙醯氨基苯酚；二氧化鈦；光催化；六價鉻；硝酸鹽；連續式； MOPAC ； Acetaminophen ； TiO2 ； photocatalysis ； Cr(VI), NO3- ； continuous system ； MOPAC

Abstract │ Reference (86) │ Altmetrics

Abstract 〈TOP〉

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The presence of non-steroidal anti-inflammatory drugs (NSAIDs) has been reported as emerging contaminants in many countries. Acetaminophen a NSAIDs with relative high concentrations in surface water, were chosen in the study. The aim of this study was to remove the emerging contaminants of acetaminophen by TiO2 and to discuss the effect of reductive substances(Cr(VI), NO3-), which co exists in acetaminophen solution. 
There are two parts in this study. The first part is to find the optimum removal efficiency of acetaminophen under different parameters(hydraulic retention time (HRT), initial pH, aeration and TiO2 dosage). The second part is to discuss the effect of Cr(VI) and NO3- in acetaminophen solution under the optimum operation conditions.
In the first part, acetaminophen had the highest removal efficiency of 98.77 % under the operating conditions of acetaminophen＝10 mg/L, HRT＝40 min, initial    pH＝2, aeration with oxygen and TiO2＝0.5 g/L.
Compared with the removal efficiency that only acetaminophen existed, the removal efficiency of the solution that Cr(VI) existed was worse since, both acetaminophen and Cr(VI) were photocatalyzed. But the acetaminophen degradation rate was faster with the presence of Cr(VI). If the NO3- existed in the acetaminophen solution, after 8 hr of photocatalysis, the acetaminophen removal efficiency reached 99.08%. Compare with the removal efficiency that only acetaminophen existed, the removal efficiency of acetaminophen with the presence of NO3- was better. 
In this study, TOC was analyzed to determine the mineralization of acetaminophen, but the TOC values were fluctuated. The reason was that the acetaminophen after photocatalysis produced some intermediates. Such as alcohol, ether, ester and acid, analyzed by GC/MS. Since more alcohol was observe than the rest intermediates, and alcohol in the solution might vaporize into air, causing fluctuatation of the TOC values.

Reference ( 86 ) 〈TOP〉

1.Lin, A.Y. and Tsai,Y.T. , Occurrence of pharmaceuticals in Taiwan's surface waters: impact of waste streams from hospitals and pharmaceutical production facilities. Sci Total Environ, 2009. 407(12): p. 379-382.
連結：
2.Lin, A.Y., Yu,T.H. ,and Lateef,S.K. , Removal of pharmaceuticals in secondary wastewater treatment processes in Taiwan. Journal of Hazardous Materials, 2009. 167(1-3): p. 116-139.
連結：
3.Zhang, X., Wu, F., Wu,F., Wu, X. , Chen, P., and Deng, N., Photodegradation of acetaminophen in TiO2 suspended solution. Journal of Hazardous Materials, 2008. 157(2-3): p. 300-307.
連結：
5.Wong, M.S., Chou H. P, and Yang, T.S. , Reactively sputtered N-doped titanium oxide films as visible-light photocatalyst. Thin Solid Films, 2006. 494(1-2): p. 244-249.
連結：
6.Fujishima, A. and Honda,K., Electrochemical photolysis of water at a semiconductor electrode. Nature, 1972. 238(5358): p. 37-38.
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