Resumo

KIEFFER, Luis Alfredo et al. SYNERGIC SONOCHEMICAL DECOLORATION OF METHYL ORANGE USING TRICHLOROMETHANE IN TWO ULTRASONIC REACTORS. Rev. Int. Contam. Ambient [online]. 2020, vol.36, n.1, pp.7-20.  Epub 22-Dez-2020. ISSN 0188-4999.  https://doi.org/10.20937/rica.2020.36.53034.

The discoloration of methyl orange (AM), an azo dyer with mutagenic properties, is studied. The action of trichloromethane (HCCl3) (TM) is analyzed as a synergistic agent, using batch and continuous ultrasonic reactors. It is demonstrated that the sonochemical discoloration of AM is widely favored by the addition of low concentrations of HCCl3. In the case of the batch reactor, discolorations of 17 and 98 % were obtained without and with TM, and the respective kinetic constants were statistically different. In the continuous reactor, discolorations of 7 % and greater than 80 % were reached without and with the addition of TM, respectively, once the reactor entered a steady state.

Palavras-chave : water treatment; ultrasound; azo dyer.