2009
DOI: 10.1590/s0100-40422009000600027 View full text |Buy / Rent full text
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Abstract: . In this work the potentiality of reductive-oxidative processes based on zero-valent iron was studied aiming the degradation of nitroaromatic compounds and the remediation of residues from the explosive industry. The reductive process was applied as a continuous treatment system, using steel-wool as zero-valent iron source. The process permitted an almost total degradation of nitrobenzene, nitrophenol, nitrotoluene, dinitrotoluene and trinitrotoluene, probably with generation of the respective amine-derivativ… Show more

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“…These processes can be used to initiate remediation of complex anthropogenic chemicals, such as nitro and chlorinated aromatic compounds. [7][8][9][10][11] Dyes are another category of complex chemicals that are labile to reduction, as already shown for several dyes. [12][13][14][15][16][17][18] Several metals (such as Zn, Sn, Pt) can be used as reduction agents, but iron has received the foremost emphasis due to its high efficiency in addition to its low cost and toxicity.…”
Section: Introductionmentioning
“…Nitro-aromatics are degraded by various pathways using different biochemical mechanisms but some nitro-aromatics often either persist or become aromatic amine end-products in the environment [13,14].…”
Section: Introductionmentioning
“…O processo de oxidação via radicais hidroxila pode ocorrer por três mecanismos, basicamente: abstração de hidrogênio (ocorre geralmente com hidrocarbonetos alifáticos), adição eletrofílica (compostos orgânicos que possuem ligações π, geralmente hidrocarbonetos insaturados e aromáticos) e transferência eletrônica (ocorre quando as outras duas opções são desfavoráveis, como em hidrocarbonetos clorados). Também podem ocorrer reações paralelas, como a geração de H 2 O 2 , diminuindo a velocidade da degradação do composto em questão (CAVALOTTI et al, 2009;NOGUEIRA et al, 2007).…”
Section: Processos Oxidativos Avançadosunclassified