Abstract：
:The rate-limiting step of azo dye decolorization was elucidated by exploring the microbial reduction of a model quinone and the chemical decolorization by previously reduced quinone at different salinity conditions (2-8%). Microbial experiments were performed in batch with a marine consortium. The decolorization of Direct Blue 71 (DB71) by the marine consortium at 2% salinity, mediated with anthraquinone-2,6-disulfonate (AQDS), showed the highest rate of decolorization as compared with those obtained with riboflavin, and two samples of humic acids. Moreover, the incubations at different salinity conditions (0-8%) performed with AQDS showed that the highest rate of decolorization of DB71 by the marine consortium occurred at 2% and 4% salinity. In addition, the highest microbial reduction rate of AQDS occurred in incubations at 0%, 2%, and 4% of salinity. The chemical reduction of DB71 by reduced AQDS occurred in two stages and proceeded faster at 4% and 6% salinity. The results indicate that the rate-limiting step during azo decolorization was the microbial reduction of AQDS.
journal_name
J Environ Managejournal_title
Journal of environmental managementauthors
Alvarez LH,Meza-Escalante ER,Gortáres-Moroyoqui P,Morales L,Rosas K,García-Reyes B,García-González Adoi
10.1016/j.jenvman.2016.08.044subject
Has Abstractpub_date
2016-12-01 00:00:00pages
84-89eissn
0301-4797issn
1095-8630pii
S0301-4797(16)30582-5journal_volume
183pub_type
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