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HERO ID
5150971
Reference Type
Journal Article
Title
Response surface optimization of bioremediation of Acid black 52 (Cr complex dye) using Aspergillus tamarii
Author(s)
Ghosh, A; Dastidar, MG; Sreekrishnan, TR
Year
2017
Is Peer Reviewed?
Yes
Journal
Environmental Technology
ISSN:
0959-3330
EISSN:
1479-487X
Volume
38
Issue
3
Page Numbers
326-336
Language
English
PMID
27242169
DOI
10.1080/09593330.2016.1192225
Web of Science Id
WOS:000392818400010
Abstract
Bioremediation of the Cr complex dye (Acid black 52) was performed in batch and continuous modes using growing Aspergillus tamarii. The removal of Cu which may be present as an impurity was 100% at 100 mg/L initial dye concentration. The removal of color and Cr decreased from 87% to 4% and from 92% to 8%, respectively, by increasing dye concentration from 100 to 5000 mg/L in batch mode. The removal of color and Cr increased from 27% to 67.8% and from 32% to 72%, respectively, with increasing hydraulic retention time from 28 to 220 h at 100 mg/L dye concentration in continuous mode. For optimization of color removal using response surface methodology (RSM) the ranges of parameters were kept at dye concentration: 200-500 mg/L; pH: 4-6 and time: 35-50 hours. Maximum color removal suggested by the model was 85.6809% at initial dye concentration 200 mg/L, pH 5.25 and time 50 h. The validation experiments in batch and continuous modes were conducted at the optimum conditions as suggested by the RSM model. The theoretical and experimental responses of color removal were in close agreement in batch mode. The scanning electron microscopy, energy dispersive X-ray analysis, transmission electron microscopy and gas chromatography-mass spectroscopy analyses indicated biosorption and biodegradation of dye.
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