Utilize este identificador para referenciar este registo: http://hdl.handle.net/10198/8981
Título: Carbon nanotubes as base materials for water treatment processes
Autor: Faria, Joaquim L.
Ribeiro, Rui S.
Silva, Adrián
Silva, Cláudia G.
Figueiredo, José L.
Gomes, Helder
Data: 2013
Citação: Faria, Joaquim L.,; Ribeiro Rui S.; Silva Adrián M.T.; Silva C.G., Figueiredo José L.; Gomes Helder (2013) - Carbon nanotubes as base materials for water treatment processes, In CESEP’ 13 - 5th International Conference on Carbon for Energy Storage/Conversion and Environment Protection. Mülheim a.d. Ruhr, Alemanha.
Resumo: Chemical wastewater treatments are dependent on the addition of auxiliary oxidants, which may include molecular oxygen, ozone, and hydrogen peroxide, working on their own, or activated by means of a specialized catalyst or photocatalyst. Chemical treatments are by nature definitive processes, since they can lead to complete mineralization of the existing pollutants. However, this is seldom the case, when looking for a rational solution from the socio-economical point of view. In the case of industrial effluents, special treatments are often required, even when only a partial oxidative degradation is targeted, due to the complex nature of the pollutants (e.g. dyes, pharmaceuticals, oils, organics, inorganics and bio-compounds). Some compounds, like nitrophenols, are particularly refractory to aerobic biodegradation and in addition to that toxic, requiring strong oxidative solutions. Typical solutions are the thermal processes at elevated temperatures and pressures, or using metal supported catalysts. Alternatively, it is possible to use heterogeneous photocatalysis based on the efficient production of hydroxyl radicals. Somewhere between these two limits lies the catalytic wet peroxide oxidation (CWPO), an advanced oxidation process (AOP) involving the use of hydrogen peroxide (H2O2) as oxidation source and a suitable catalyst (typically iron based catalysts). The main role of the catalyst is to promote H2O2 decomposition through the formation of hydroxyl radicals (HO●) with high oxidizing potential, effective in the destruction of a huge range of pollutants [1,2]. This type of technology is especially attractive due to the use of mild conditions, simple equipment and the environmental safe oxidant H2O2.
Peer review: yes
URI: http://hdl.handle.net/10198/8981
Aparece nas colecções:DTQB - Resumos em Proceedings Não Indexados ao ISI/Scopus

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