1. TRATAMENTO DE EFLUENTES SIMULADOS CONTENDO ÍONS CIANETO DA INDÚSTRIA DE TINGIMENTO DE ÁGATAS.
- Author
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Mateus Petry, Vitor, Marozzin Mistura, Clóvia, Vieira, Yasmin, and Luiz Foletto, Edson
- Subjects
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ULTRASONIC waves , *CHEMICAL oxygen demand , *POROUS materials , *BODIES of water , *ULTRAVIOLET radiation , *HYDROGEN peroxide - Abstract
Rio Grande do Sul is responsible for much of the agate geode extraction in the world. The agate is characterized as a porous material, suitable for dyeing processes, which generate effluents of high toxicity potential by the presence of cyanide ions (CN-), which, in certain concentrations, can be lethal to the health of living beings as well as causing numerous problems in the water bodies where these effluents are launched without proper treatment. This research aimed to compare alternative ways of treatment of wastewater containing CN- (aq) ions through the use of advanced Oxidative Processes (POAs) such as modified Fenton and photo Fenton, assisted by ultrasonic radiation. To verify the efficiency of the processes were quantified parameters such as discoloration and Chemical Demand Oxygen (COD), between raw and treated. The highest efficiency was obtained for the process with UV radiation using hydrogen peroxide (H2O2) 30% in 25 minutes the degradation reached 50.72%, reaching the end of the process with 57.63% degradation of the effluent color. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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