Mr. Haghighipodeh et Sk. Bhattacharya, FATE AND TOXIC EFFECTS OF NITROPHENOLS ON ANAEROBIC TREATMENT SYSTEMS, Water science and technology, 34(5-6), 1996, pp. 345-350
Citations number
9
Categorie Soggetti
Water Resources","Environmental Sciences","Engineering, Civil
Modem industrial societies discharge vast quantities of chemicals into
the environment Removal of priority pollutants is a vital task of inc
reasing importance. A literature search shows that more quantitative i
nformation about the effects and fates of these pollutants during anae
robic treatment is needed. The objective of this research was to study
the fate and toxic effects of nitrophenols (2-nitrophenol, 3-nitrophe
nol, 4-nitrophenol and 2,4-dinitrophenol) on methanogenic bacteria. Bo
th batch and continuous flow experiments were performed. Batch anaerob
ic toxicitys assay (ATA) were performed in methanogenic enrichment cul
tures. The effects of 4-nitrophenol were also studied using chemostats
at 15-day solids retention time. Stock acetate enrichment cultures we
re developed and used in this research. An inhibition coefficient mode
l was used to quantify the effects of 1-nitrophenol. The competitive i
nhibition coefficient model can adequately describe the fate of the sy
stems exposed to 4-nitrophenol. The results of this research showed th
at about 81% of 4-nitrophenol can be removed by biodegradation. Among
the nitrophenols studied, 4-nitrophenol and 2,4-dinitrophenol were mos
t toxic. Copyright (C) 1996 IAWQ.