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Nowadays, one of the most important global concerns is water pollution which showed increasing trends during the recent decades. The aim of this study was to develop a new method, based on the increment of degradation rate by using immobilized Co and Fe ions and activated persulphate to form highly reactive sulphate radicals, to degrade MG in aqueous solution. An ultrasonic bath with a frequency of 35 kHz was used to investigate the effect of different methods such as the only US, ultrasonication coupled with persulphate (US+PS), ultrasonication+Co (US+Co), ultrasonication+Fe (US+Fe), ultrasonication+Co resin (US+Coresin), ultrasonication+Fe resin (US+Feresin), ultrasonication+Co activated persulphate (US+Co+PS), ultrasonication+Fe activated persulphate (US+Fe+PS) to find the best and efficient approach for treating the wastewater. The other parameters such as the effect of pH, dosage of persulphate, Co and Fe as catalyst and contact time were investigated. The FT-IR spectra were utilized to find out which bands shifted during the sonication. The outcomes illustrated that, the US system coupled with PS and Co was the best way among the others.

Sonochemical degradation of malachite green in the presence of persulphate, Co (II) and Fe (II) as catalyst