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Treatment of wastewater containing dyes used in the Syrian textile industry
Author(s) -
ElKadri Saleh,
Dabbit Ousama,
Kakhia Hassan
Publication year - 2002
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.537
Subject(s) - hydrogen peroxide , chemistry , wastewater , reagent , textile industry , filtration (mathematics) , hydroxide , pulp and paper industry , sulfate , coagulation , sodium hydroxide , textile , chemical oxygen demand , reactive dye , nuclear chemistry , inorganic chemistry , waste management , organic chemistry , dyeing , materials science , mathematics , psychology , statistics , archaeology , psychiatry , engineering , composite material , history
Three types of wastewater, from commercial dyeings containing reactive, disperse and direct dyes were treated using an organic coagulant at pH 5.5 as a first step, with stirring for 5 min. The second step was oxidation by Fenton's reagent (hydrogen peroxide and iron(II) sulfate) at pH 2.5–3 for 30 min. The pH of the solution was then raised to 7.5–8 where coagulation by iron hydroxide took place over 20 min. Finally, sand filtration was performed. The percentage of color removal from treated wastewater was more than 99.00% and the percentage decrease in COD was more than 96.00%. © 2002 Society of Chemical Industry