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Decoloration of acid dye effluent with ozone: effect of pH, salt concentration and treatment time
Author(s) -
Muthukumar M,
Selvakumar N
Publication year - 2005
Publication title -
coloration technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.297
H-Index - 49
eISSN - 1478-4408
pISSN - 1472-3581
DOI - 10.1111/j.1478-4408.2005.tb00240.x
Subject(s) - ozone , effluent , chemistry , salt (chemistry) , acid dye , environmental chemistry , nuclear chemistry , inorganic chemistry , dyeing , organic chemistry , environmental engineering , environmental science
A study of the ozone treatment of textile effluent containing acid dyes has been carried out to explore the influence of their chemistry, and the pH, salt concentration, ozone dose and time of treatment. The experiments were constructed using a Box‐Hunter second‐order composite design for three variables. The study has demonstrated that the type of aromatic rings and the number of sulphonic acid groups in the dye have a marked effect on decoloration. The pH, salt concentration and treatment time are also found to have a predictable influence. The ozone oxidation of acid dye effluent results in a reduction in pH and total organic carbon content.