Ozonation of naphthalene sulfonic acids in aqueous solutions. Part I: elimination of COD, TOC and increase of their biodegradability

Water Research
Zhu ShiyunLi Daotang

Abstract

Ozonation of 11 naphthalene sulfonic acids (NSA) in the aqueous solution was studied by bubbling at 31 degrees C at an ozone dose rate of 5.56 mg min(-1) l(-1). COD, TOC and BOD5 of these compounds were tested. It was found that COD and TOC can be removed effectively by ozonation as expected. More than 40% COD of compounds No. I (2-amino-1-NSA), No. 5 (1-hydroxy-7-amino-5-NSA), No. 6 (6-hydroxy-1-NSA), No. 8 (6-amino-1,4-naphthalene disulfonic acid) and No. 11 (I -hydroxy-6-amino-3-NSA) has been eliminated at an ozone dosage of 5.56 mg min(-1) l(-1) for 2 h. Although TOC removal was very different, a good biodegradability was reached for NSAs with an average ozone consumption of 3.0 mgl(-1) for a TOC0 concentration of 100 mg(-1). Ozonation and biotreatment should be good alternatives for these compounds, especially after 20% TOC reduction and TOC removal were more sensitive in predicting an increase in biodegradability during ozonation, than that of COD. NSAs are similar in their behavior with reference to ozone consumption. In order to obtain a good biodegradability of NSAs at a TOC0 concentration of 100 mgl(-1), an ozone consumption between 2.0 and 4.0 mg mg(-1) ACOD is needed for this setup and 3.0 mg O3 mg(-1) TOC0 requirem...Continue Reading

References

Jul 29, 1999·Bulletin of Environmental Contamination and Toxicology·S ZhuH Lian

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Citations

Apr 12, 2012·Journal of Industrial Microbiology & Biotechnology·C Juárez-RamírezO Ramos Monroy
Jun 8, 2011·Environmental Science and Pollution Research International·James Kanagaraj, Asit Baran Mandal
Jan 10, 2006·Ecotoxicology and Environmental Safety·Idil Arslan-Alaton, Ali Efe Caglayan
Nov 16, 2013·Journal of Hazardous Materials·Huanhuan LiuGang Xue
Oct 30, 2014·Environmental Technology·Antonella GullottoFabrizio Briganti
Sep 1, 2012·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Encarnación Jurado-AlamedaIgnacio Moya-Ramírez

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