ENHANCEMENT OF 4-NITROPHENOL OZONATION IN WATER BY NANO ZNO CATALYST

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TABATABAEI S.M.; DASTMALCHI S.; MEHRIZAD A.; GHARBANI P.

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Journal: IRANIAN JOURNAL OF ENVIRONMENTAL HEALTH SCIENCE AND ENGINEERING (IJEHSE) Year:2011 | Volume:8 | Issue:4 Page(s): 363-372

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Information Journal Paper

Title

ENHANCEMENT OF 4-NITROPHENOL OZONATION IN WATER BY NANO ZNO CATALYST

Author(s)

TABATABAEI S.M. | DASTMALCHI S. | MEHRIZAD A. | GHARBANI P. | Issue Writer Certificate

Keywords

4-NITROPHENOL

OZONATION

NANO ZNO

TOTAL ORGANIC CARBON

NITROGEN CONVERSION

Abstract

The removal of 4-NITROPHENOL (4NP) from aqueous solution by ozone combined with nano-ZnO was investigated in a laboratory-scale reactor in which pH of solution, ZnO dosage and initial 4-NITROPHENOL concentration were considered as variables. The degradation of 4-NITROPHENOL was determined using UV-Vis and HPLC methods. Interestingly, the degradation of 4-NITROPHENOL was high under acidic condition where the degradation was about 93% at initial phenol solution pH=3. It was due to aggregation of nano-ZnO particles above pH=6.5. This result was different from the case of OZONATION alone, in which higher pH had positive effect on the degradation of 4-NITROPHENOL due to the formation of hydroxyl radical. As expected, degradation efficiency increased by increasing the NANO ZNO dosage and initial 4-NITROPHENOL concentration. It was found that the nanosized ZnO enhanced the degradation of ozone and the catalytic OZONATION enhanced the degradation of 4-NITROPHENOL on the surface of the nanosized ZnO. In addition, the degree of degradation was also determined indirectly through TOTAL ORGANIC CARBON (TOC) of the samples. Carbon mineralization of 4-NITROPHENOL was obtained as 13.68% and 60.34% during OZONATION and nano-ZnO catalytic OZONATION, respectively, after 30 min reaction, proving that combined OZONATION and nano-ZnO for reduction of TOC is more efficient. Also a high degree of nitrogen mineralization during catalytic OZONATION was achieved at pH=3 (7.61 mg/L).

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APA: Copy

TABATABAEI, S.M., DASTMALCHI, S., MEHRIZAD, A., & GHARBANI, P.. (2011). ENHANCEMENT OF 4-NITROPHENOL OZONATION IN WATER BY NANO ZNO CATALYST. IRANIAN JOURNAL OF ENVIRONMENTAL HEALTH SCIENCE AND ENGINEERING (IJEHSE), 8(4), 363-372. SID. https://sid.ir/paper/575614/en

Vancouver: Copy

TABATABAEI S.M., DASTMALCHI S., MEHRIZAD A., GHARBANI P.. ENHANCEMENT OF 4-NITROPHENOL OZONATION IN WATER BY NANO ZNO CATALYST. IRANIAN JOURNAL OF ENVIRONMENTAL HEALTH SCIENCE AND ENGINEERING (IJEHSE)[Internet]. 2011;8(4):363-372. Available from: https://sid.ir/paper/575614/en

IEEE: Copy

S.M. TABATABAEI, S. DASTMALCHI, A. MEHRIZAD, and P. GHARBANI, “ENHANCEMENT OF 4-NITROPHENOL OZONATION IN WATER BY NANO ZNO CATALYST,” IRANIAN JOURNAL OF ENVIRONMENTAL HEALTH SCIENCE AND ENGINEERING (IJEHSE), vol. 8, no. 4, pp. 363–372, 2011, [Online]. Available: https://sid.ir/paper/575614/en

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