Degradation of anthraquinone dye C.I. Reactive Blue 19 in aqueous solution by ozonation.
This study investigated the degradation of anthraquinone reactive dye C.I. Reactive Blue 19 (RB-19) with initial concentration of 100mg L(-1) in aqueous solution by ozone oxidation. The results of UV/VIS and FTIR spectra showed that the anthraquinone structures, nitrogen linkages and amino groups of RB-19 were destroyed under direct ozone reaction. The identification by LC-MS and GC-MS analyses indicated that some organic acids (e.g., phthalic acids) and 1,3-indanone could be the primary degradation products, respectively. The Microtox toxicity of the ozonated RB-19 solution initially increased but subsequently decreased when ozonation time increased. This detoxification accompanied biodegradability enhancement revealed by BOD/COD ratio increasing from 0.15 to 0.33 after 10min of ozonation.
Fanchiang
Jen-Mao
JM
National Central University, Jhongli, Taiwan, ROC.
Tseng
Dyi-Hwa
DH
D000880:Anthraquinones / Q000378:metabolism* / Q000633:toxicity; D001673:Biodegradation, Environmental; D002853:Chromatography, Liquid; D004396:Coloring Agents / Q000378:metabolism*; D008401:Gas Chromatography-Mass Spectrometry; D013058:Mass Spectrometry; D010084:Oxidation-Reduction; D010126:Ozone / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet; D014867:Water / Q000737:chemistry*
D000880:Anthraquinones; D004396:Coloring Agents; D014867:Water; D010126:Ozone; C024758:Remazol Brilliant Blue R