Aplicação da oxidação eletroquímica para tratamento de águas residuárias reais em planta piloto
Water is a fundamental asset for the sustainable development of countries that must be consumed and disposed of in a conscious manner. It consists of a limited resource, increasingly scarce in some regions of the world. Contamination of surface and underground water sources by organic chemical co...
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| Formato: | doctoralThesis |
| Idioma: | pt_BR |
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Universidade Federal do Rio Grande do Norte
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| Endereço do item: | https://repositorio.ufrn.br/handle/123456789/48234 |
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| Resumo: | Water is a fundamental asset for the sustainable development of countries that must
be consumed and disposed of in a conscious manner. It consists of a limited resource,
increasingly scarce in some regions of the world. Contamination of surface and underground
water sources by organic chemical compounds is definitely a matter of concern. Lately, there
are many alternatives used in the treatment of wastewater and drinking water, among them,
the advanced oxidative processes have gained great acceptance for the disinfection and
decontamination of effluents. Treatments by advanced oxidative processes have good efficacy
in eliminating chemical and microbial contaminants in water. The main highlight of advanced
oxidative processes is the in situ production of the highly reactive species of the hydroxyl
radical (•OH), the superoxide radical (•O2-) and the sulfate radical (•SO4-), which can
fragment organic pollutants and pathogens. These processes are based on electrogeneration of
hydroxylic radicals (•OH), which can react non-selectively with organic pollutants until their
complete removal. Radicals (•OH) have a high redox potential (2.8 eV/SHE), being able to
attack organic compounds in four ways: hydrogen abstraction, combination, addition of
radicals and electron transfer. This study presents the construction of a pre-pilot scale
electrochemical reactor for the electrochemical treatment of anodic oxidation in wastewater
from the petroleum industry, textile, pharmaceutical and pesticide industries, disinfection of
water with potability potential as an alternative replacement for chlorine a so that it can be a
remediation alternative with low cost of assembly, installation and energy consumption, using
solar energy sources. The results of this research reveal that electrochemical oxidation, used
on a pilot plant scale, is efficient and can be used in conjunction with other wastewater
treatment techniques. It can also be an alternative for disinfecting water with potability
potential, without the use and storage of chlorine. The reactor proved to be efficient, with the
possibility of being applied anode electrodes of different materials according to the economic
viability of the material, being able to be used for different types of effluents, thus
contributing to other researches and, consequently, increasing the variety of effluent to be
treated by the same equipment. |
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