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Treatment of wastewaters from the olive mill industry by sonication
Author(s) -
Oztekin Rukiye,
Sponza Delia Teresa
Publication year - 2013
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.3808
Subject(s) - sonication , chemistry , potassium iodate , daphnia magna , phenol , nuclear chemistry , wastewater , acute toxicity , chemical oxygen demand , toxicity , potassium permanganate , chromatography , pulp and paper industry , organic chemistry , iodine , waste management , engineering
BACKGROUND: In this study, the effects of additives (manganese (III) oxide (Mn 3 O 4 ), Cu +2 , Fe 0 and potassium iodate (KIO 3 )) and radical scavengers (sodium carbonate (Na 2 CO 3 ), perfluorohexane (C 6 F 14 ) and t‐buthyl alcohol (C 4 H 10 O)) on the dephenolization, decolorization, dearomatization and detoxification of olive mill wastewater (OMW) by sonication were investigated because wastewaters from this industry are not removed effectively. RESULTS: The maximum COD, color, total phenol and total aromatic amines (TAAs) removal efficiencies were 63, 82, 78 and 71%, respectively, at 60 °C with sonication only. The TAAs and phenol yields were increased to 96 and 97% with 6 mg L −1 KIO 3 and 3 mg L −1 Fe 0 while color removal reached 97% with 6 mg L −1 C 6 F 14. The total annual cost with sonication only was 665 € m −3 year −1 while the cost slightly increased (666€ m 3 year −1 ) with C 6 F 14 . The maximum acute toxicity removals were 97‐98% in Daphnia magna and Vibrio fischeri The Microtox acute toxicity test was more sensitive than the Daphnia magna to the OMW samples. CONCLUSION: COD, color, total phenol, TAAs and toxicity in an OMW were removed efficiently and cost‐effectively by sonication. © 2012 Society of Chemical Industry