Abstract

Waste management is a key issue in environmental management, as most of the waste is not reused or has an incorrect final destination.The porongo (Langenatiasiceraria) is a known Cucurbitaceae in the southern region of Brazil, used culturally to prepare Chimarr#xE3;o, the drink of the state of Rio Grande do Sul. However, during its processing, significant amounts of residues are generated, becoming an environmental problem. An alternative for the appropriate treatment and disposal of these residues is the use of Advanced Oxidative Processes (AOPs), highlighting heterogeneous photocatalysis. in-nature and doped ferric chloride samples were prepared and later characterized by diffuse reflectance spectroscopy (DRS), nitrogen porosimetry and zeta potential (ZP). The Fe-porongo(Langenatiasiceraria) photocatalyst presented better photocatalytic activity, with a degradation of 50.33% (k = 0.0059 min-1, under ultraviolet radiation) and 43.23% (k = 0.0046 min-1, under visible radiation), while under the same conditions the commercial TiO2 catalyst obtained a degradation of 50.02% (k = 0.0057 min-1) and 42.14% (k = 0.0043 min-1) under UV and visible radiation, respectively. In this way, the present work presents eco-technical strategies for the reuse of residual biomass of porongo(Langenatiasiceraria), emphasizing its application in heterogeneous photocatalysis to degrade pollutants such as the one used in this work RhB