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Degradation of AR 97 aqueous solution by combination of ultrasound and Fenton reagent

✍ Scribed by Ji-Tai Li; Ya-Li Song

Publisher: American Institute of Chemical Engineers
Year: 2009
Tongue: English
Weight: 131 KB
Volume: 29
Category: Article
ISSN: 1944-7442
DOI: 10.1002/ep.10375

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✦ Synopsis

An efficient and convenient degradation of AR 97 (C.I. Acid Red 97) in aqueous solution by the combination of ultrasound and Fenton reagent was reported. The various affecting factors were studied. Under ultrasound, the degradation ratio is 99.9% for the initial concentration of 50 mg L 21 using 1.57 mmol L 21 H 2 O 2 , 0.054 mmol L 21 Fe 21 at 408C within 140 min. The combination method was more effective than sonolysis or Fenton reagent process treatment individually. In the combined process, the effect of the kind of anions (Cl 2 , SO 4 22 , and H 2 PO 4 2 ) and Fenton-like reagents (Cu 21 /H 2 O 2 , Co 21 /H 2 O 2 , and Mn 21 /H 2 O 2 ) on degradation was also observed. Except for SO 4 22

, others had a negative effect on degradation.

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