PMID- 21449472
OWN - NLM
STAT- MEDLINE
DCOM- 20110425
LR  - 20190923
IS  - 1061-4303 (Print)
IS  - 1061-4303 (Linking)
VI  - 83
IP  - 2
DP  - 2011 Feb
TI  - Decolorization of the AO24 azo dye and reduction of toxicity and genotoxicity in 
      trickling biofilters.
PG  - 107-15
AB  - Acid Orange 24 (AO24) dye was degraded in a trickling biofilter packed with peat 
      and wood chips and inoculated with biomass from a petrochemical industry 
      wastewater system. Different operating strategies were tested; in the first 
      stage, two biofilters were operated independently--one non-aerated biofilter 
      (passive) and the other with aeration-subsequently, the systems were operated 
      serially, and effluent from the non-aerated biofilter was fed to the biofilter 
      with aeration. This treatment train was used to test three different filtration 
      velocities--0.141, 0.282, and 0.423 m/d. The results show that, when operating 
      the systems with a dye charge of 0.035 kg AO24 m2/d and treating the effluent in 
      a single step, good removal efficiencies of AO24 (95 and 89%), COD (63 and 53%), 
      and acute toxicity (63 and 78%) were obtained in both biofilters (with and 
      without air), although mutagenic and potentially carcinogenic intermediary 
      compounds were not removed, because genotoxicity exhibits values higher than 2.0 
      units for the mutation rate. When using the non-aerated biofilter/aerated 
      biofilter treatment train, it is possible to treat a dye charge 3 times greater 
      (0.106 kg AO24 m2/d) and efficiently remove 98% AO24, 76% COD, 100% acute 
      toxicity, and 100% genotoxicity, which indicates that, with this biological 
      system, an advanced degree of biotransformation and mineralization of the azo dye 
      AO24 is achieved.
FAU - Garzoon-Zunga, Marco A
AU  - Garzoon-Zunga MA
AD  - Instituto Mexicano de Tecnologia del Agua, Jiutepec, Mor., Mexico. 
      mgarzon@tlaloc.imta.mx
FAU - Sandoval-Villasana, Ana M
AU  - Sandoval-Villasana AM
FAU - Moeller-Chavez, Gabriela E
AU  - Moeller-Chavez GE
LA  - eng
PT  - Journal Article
PL  - United States
TA  - Water Environ Res
JT  - Water environment research : a research publication of the Water Environment 
      Federation
JID - 9886167
RN  - 0 (Azo Compounds)
RN  - 0 (Mutagens)
RN  - 0 (Soil)
RN  - 0 (Water Pollutants, Chemical)
RN  - 8796B4I6HE (Acid Orange 24)
SB  - IM
MH  - Adsorption
MH  - Air
MH  - Aliivibrio fischeri/drug effects/genetics
MH  - Azo Compounds/*chemistry
MH  - Bacteria
MH  - Biofilms
MH  - Biotransformation
MH  - Filtration/*methods
MH  - Mutagenicity Tests
MH  - Mutagens/chemistry/toxicity
MH  - Oxygen Consumption
MH  - Salmonella typhimurium/drug effects/genetics
MH  - Soil
MH  - Waste Disposal, Fluid/methods
MH  - Water Pollutants, Chemical/*chemistry/*metabolism/toxicity
MH  - Water Purification/*instrumentation/methods
MH  - Wood
EDAT- 2011/04/01 06:00
MHDA- 2011/04/26 06:00
CRDT- 2011/04/01 06:00
PHST- 2011/04/01 06:00 [entrez]
PHST- 2011/04/01 06:00 [pubmed]
PHST- 2011/04/26 06:00 [medline]
AID - 10.2175/106143010x12780288627977 [doi]
PST - ppublish
SO  - Water Environ Res. 2011 Feb;83(2):107-15. doi: 10.2175/106143010x12780288627977.