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dc.contributor.authorPoleto, Cristianopt_BR
dc.contributor.authorSoeira, Thiago Vinicius Ribeiropt_BR
dc.contributor.authorAraujo, Matheus Nevespt_BR
dc.contributor.authorGonçalves, Julio Cesar de Souza Ináciopt_BR
dc.contributor.authorRezende, Elias Gabriel Fernandes dept_BR
dc.contributor.authorCappa, Otávio Augusto Puglieript_BR
dc.contributor.authorFerreira, Deusmaque Carneiropt_BR
dc.contributor.authorRocha, Vinícius Carvalhopt_BR
dc.date.accessioned2021-03-23T04:23:07Zpt_BR
dc.date.issued2020pt_BR
dc.identifier.issn2236-1170pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/219215pt_BR
dc.description.abstractThe presence of natural organic matter (NOM) in water does not present direct risk to the human body or to the environment. However, its presence along with other pollutants can lead to countless issues and damage human health and the environment. The hydrodynamic cavitation (HC) phenomenon started being used in the early 21st century as a process capable of treating supply-water and wastewater based on pollutant and pathogen degradation. Process effectiveness increases when it is combined to chemical agents, creating an advanced oxidation process (AOP). Although several studies have presented broaden applications for the HC process, its use for NOM removal from supply-water was not yet assessed; therefore, it remains a gap in scientific knowledge. The aim of the current study is to assess HC potential in NOM removal. In order to do so, the experiments were carried out in bench scale hydrodynamic cavitation system operated at batch model within 15-min duration period-of-time. In addition, decantation experiments (24-h period-of-time) were performed in order to check HC influence on molecules found in reaction medium after the exposure of NOM to the phenomenon. NOM was produced by a synthetic humic acid (HA) matrix at fixed concentration of 100 ppm. In total, 16 experiments were carried out; each experiment was featured by the following pair: pH (2.6, 3.0, 3.5 and 5.5) and hydrogen peroxide (0, 1, 5 and 30 mL). The best removal efficiencies (34%-36%) were observed in the most acidic pH ranges (2.6-3.0) at H2O2 concentration of 15mL. Results have presented high NOM removal efficiency (approximately 90%) after decantation at the most acidic pH ranges, as well. It can be explained by the fact that hydrodynamic cavitation in acid solution can break molecular structures suspended in the liquid medium, which favors decantation. Based on the present study, hydrodynamic cavitation with hydrogen peroxide addition can remove NOM from water; moreover, pH control is an essential factor for process development.en
dc.format.mimetypeapplication/pdfpt_BR
dc.language.isoengpt_BR
dc.relation.ispartofRevista Eletrônica em Gestão, Educação e Tecnologia Ambiental (REGET). Santa Maria, RS: UFSM. Vol. 24, nesp. (2020), e29, 17 p.pt_BR
dc.rightsOpen Accessen
dc.subjectAdvanced oxidation processen
dc.subjectCavitacaopt_BR
dc.subjectHydrodynamic cavitationen
dc.subjectPeróxido de hidrogêniopt_BR
dc.subjectMatéria orgânicapt_BR
dc.subjectOrifice plateen
dc.subjectProcessos oxidativos avançadospt_BR
dc.subjectTratamento da águapt_BR
dc.titleRemoval of natural organic matter in waters using hydrodynamic cavitation and hydrogen peroxide (HC-H2O2)pt_BR
dc.title.alternativeRemoção de matéria orgânica natural em águas usando cavitação hidrodinâmica e peróxido de hidrogênio (CH-H2O2) pt
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb001121538pt_BR
dc.type.originNacionalpt_BR


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