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An Improved Method for Removal of Azo Dye Orange II from Textile Effluent Using Albumin as Sorbent
Technical School SENAI-Paulista, Paulista 53417-710, PE, Brazil
Nucleus of Research in Environmental Sciences-NPCIAMB, Catholic University of Pernambuco, UNICAP, 50050-590 Recife, PE, Brazil
Network of Biotechnology, Catholic University of Pernambuco, Recife 50050-900, PE, Brazil
Microbiology Department, Federal Rural University of Pernambuco, Recife 52171-900, PE, Brazil
Chemical Engineering Department, Federal University of Pernambuco, Recife 50670-901, PE, Brazil
* Author to whom correspondence should be addressed.
Received: 10 October 2012; in revised form: 24 November 2012 / Accepted: 27 November 2012 / Published: 30 November 2012
Abstract: Azo dyes are generally resistant to biodegradation due to their complex structures. Acid orange II is one of the most widely used dyes in the textile industry. The influence of bovine serum albumin (BSA) in different concentrations, pH, and time of contact on Orange II was investigated using kinetics and adsorption-isotherm experiments. The results showed that the maximum colour removed from dye/albumin was 99.50% and that a stable dye-protein complex had been formed at pH 3.5 and in a proportion of 1:3 (v/v), respectively. The synthetic effluent did not show toxicity to the microcrustacean Artemia salina, and showed a CL50 equal to 97 µg/mL to azo dye orange II. Additionally, the methodology was effective in removing the maximum of orange II using BSA by adsorption at pH 3.5 which mainly attracted ions to the azo dye during the adsorption process. This suggests that this form of treatment is economical and easy to use which potentially could lead to bovine serum albumin being used as a sorbent for azo dyes.
Keywords: acid orange II; albumin; decolourization; toxicity; adsorption; isotherm
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Ohashi, T.; Jara, A.M.T.; Batista, A.C.L.; Franco, L.O.; Lima, M.A.B.; Benachour, M.; da Silva, C.A.A.; Campos-Takaki, G.M. An Improved Method for Removal of Azo Dye Orange II from Textile Effluent Using Albumin as Sorbent. Molecules 2012, 17, 14219-14229.
Ohashi T, Jara AMT, Batista ACL, Franco LO, Lima MAB, Benachour M, da Silva CAA, Campos-Takaki GM. An Improved Method for Removal of Azo Dye Orange II from Textile Effluent Using Albumin as Sorbent. Molecules. 2012; 17(12):14219-14229.
Ohashi, Tadashi; Jara, Alícia M.T.; Batista, Anabelle C.L.; Franco, Luciana O.; Lima, Marcos A.B.; Benachour, Mohand; da Silva, Carlos A.A.; Campos-Takaki, Galba M. 2012. "An Improved Method for Removal of Azo Dye Orange II from Textile Effluent Using Albumin as Sorbent." Molecules 17, no. 12: 14219-14229.