Fate and biodegradability of sulfonated aromatic amines

Abstract

Ten sulfonated aromatic amines were tested for their aerobic and anaerobic biodegradability and toxicity potential in a variety of environmental inocula. Of all the compounds tested, only two aminobenzenesulfonic acid (ABS) isomers, 2-and 4-ABS, were degraded. The observed degradation occurred only under aerobic conditions with inocula sources that were historically polluted with sulfonated aromatic amines. Bioreactor experiments, with non-sterile synthetic wastewater, confirmed the results from the aerobic batch degradation experiments. Both ABS isomers were degraded in long-term continuous experiment by a bioaugmented enrichment culture. The maximum degradation rate in the aerobic bioreactor was 1.6-1.8 g l )1 d )1 for 2-ABS and a somewhat lower value for 4-ABS at hydraulic retention times (HRT) of 2.8-3.3 h. Evidence for extensive mineralization of 2-and 4-ABS was based on oxygen uptake and carbon dioxide production during the batch experiments and the high levels of chemical oxygen demand (COD) removal in the bioreactor. Furthermore, mineralization of the sulfonate group was demonstrated by high recovery of sulfate. The sulfonated aromatic amines did not show any toxic effects on the aerobic and anaerobic bacterial populations tested. The poor biodegradability of sulfonated aromatic amines indicated under the laboratory conditions of this study suggests that these compounds may not be adequately removed during biological wastewater treatment.

Destruction of azo dyes by anaerobic–aerobic sequential biological treatment: a review

“…On the other hand, most of the benzene-based aromatic amines are completely removed. Tan et al (2005) studied the fate and biodegradability of benzene-based and naphthalene-based sulphonated aromatic amines in a bioreactor. The authors reported that simple, benzene-based sulphonated amines, such as monoamino benzene sulphonic acid, were completely mineralized while diamino benzene sulphonic acid and other sulphonated amines containing naphthalene were resistant to aerobic biodegradation.…”

Les colorants textiles sources de contamination de l’eau : CRIBLAGE de la toxicité et des méthodes de traitement

“…Les amines aromatiques formées lors de la première étape de la biodégradation (azoréduction) s'accumulent dans le milieu extracellulaire et résistent à la bio-oxydation. La dégradation des amines aromatiques, en particulier celle des amines sulfoniques, est limitée, voire inhibée par leur faible transfert à travers la membrane cellulaire (TAN et al, 2005).…”

“…Des amines aromatiques sulfoniques, connues comme étant très résistantes à l'attaque bactérienne à cause de leur faible transfert à travers la membrane cellulaire (FEIGEL et kNACkMUSS, 1993;TAN et al, 2005), ont été facilement biodégradables par des bactéries de genre Pseudomonas (Figure 6). …”

Stimulation of oxygen to bioanode for energy recovery from recalcitrant organic matter aniline in microbial fuel cells (MFCs)

“…However, other studies also reported that oxygen stimulated bacterial growth or helped in the expansion of substrate utilization range, and consequently enhanced the current generation capability in MFCs (Biffinger et al, 2009;Rosenbaum et al, 2010). In case of aromatic amine, their degradation is much more flexible and more efficient under aerobic condition than anaerobic condition (Kahng et al, 2000;Tan et al, 2005). Several pure or mixed bacterial cultures use various aromatic amines as sole carbon and energy sources (Chen et al, 2012;Juarez-Ramirez et al, 2012;Sheludehenko et al, 2005).…”