DEGRADATION OF TRACE AQUEOUS 4-CHLORO-2-NITROPHENOL OCCURRING IN PHARMACEUTICAL INDUSTRIAL WASTEWATER BY OZONE

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GHARBANI P.; KHOSRAVI M.; TABATABAEI S.M.; ZARE K.; DASTMALCHI S.; MEHRIZAD A.

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Journal: INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY (IJEST) Year:2010 | Volume:7 | Issue:2 (26) Page(s): 377-384

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Title

DEGRADATION OF TRACE AQUEOUS 4-CHLORO-2-NITROPHENOL OCCURRING IN PHARMACEUTICAL INDUSTRIAL WASTEWATER BY OZONE

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Keywords

CHEMICAL OXYGEN DEMAND

DEGRADATION

KINETIC

MINERALIZATION

TOTAL ORGANIC CARBON

Abstract

Degradation of 4-chloro-2-nitro phenol by ozonation in aqueous solution was studied in a semi batch reactor under constant ozone dosage and variable pH conditions. The effectiveness of the process was estimated based on the degree of conversion of 4-chloro-2-nitro phenol. It was observed that ozonation is more effective at alkaline reaction of medium than other conditions. The degree of conversion achieved (at the first 5 minutes of the process)at pH 9 was 99.64% compared to 99.03% and 77.35% at pH 7 and 3, respectively. Another parameter used to quantify the 4-Chloro-2-nitrophenol during ozonation was the pseudo first order rate constant k [min-1]. Results showed that the rate constant of the process was approximately much higher at the alkaline pH compared to acidic ones. A considerable improvement in CHEMICAL OXYGEN DEMAND removal was observed at pH above 7. At pH 9, the reduction in CHEMICAL OXYGEN DEMAND at the end of the process reached 56.9 %. The degree of organically bounded nitrogen conversion to nitrate was higher at pH 3. Of the TOTAL ORGANIC CARBON reduction, 15.89 % was observed at pH 9. The 4-chloro-2-nitro phenol DEGRADATION intermediate products were analyzed by mass- spectrometry. The main intermediate product was chlorophenol.

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APA: Copy

GHARBANI, P., KHOSRAVI, M., TABATABAEI, S.M., ZARE, K., DASTMALCHI, S., & MEHRIZAD, A.. (2010). DEGRADATION OF TRACE AQUEOUS 4-CHLORO-2-NITROPHENOL OCCURRING IN PHARMACEUTICAL INDUSTRIAL WASTEWATER BY OZONE. INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY (IJEST), 7(2 (26)), 377-384. SID. https://sid.ir/paper/285226/en

Vancouver: Copy

GHARBANI P., KHOSRAVI M., TABATABAEI S.M., ZARE K., DASTMALCHI S., MEHRIZAD A.. DEGRADATION OF TRACE AQUEOUS 4-CHLORO-2-NITROPHENOL OCCURRING IN PHARMACEUTICAL INDUSTRIAL WASTEWATER BY OZONE. INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY (IJEST)[Internet]. 2010;7(2 (26)):377-384. Available from: https://sid.ir/paper/285226/en

IEEE: Copy

P. GHARBANI, M. KHOSRAVI, S.M. TABATABAEI, K. ZARE, S. DASTMALCHI, and A. MEHRIZAD, “DEGRADATION OF TRACE AQUEOUS 4-CHLORO-2-NITROPHENOL OCCURRING IN PHARMACEUTICAL INDUSTRIAL WASTEWATER BY OZONE,” INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY (IJEST), vol. 7, no. 2 (26), pp. 377–384, 2010, [Online]. Available: https://sid.ir/paper/285226/en

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