Optimisation of radiolysis of Reactive Red 120 dye in aqueous solution using ionising (60)Co gamma radiation by response surface methodology.
Water Sci Technol
; 73(12): 3041-8, 2016.
Article
em En
| MEDLINE
| ID: mdl-27332851
ABSTRACT
In recent years, employing radiation technology is gaining great interest in degradation of industrial effluents. In this work the possibility of using gamma irradiation to degrade Reactive Red 120 (C.I.292775) was explored. The effects of pH, dose of gamma irradiation and concentration of dye were examined and their interaction were also established based on their response. For the analysis and optimisation of variables, three factor three level Box-Wilson face centred central composite design (CCF) was used. Analysis of variance with R(2) = 0.9988, adjusted R(2) = 0.9981 and the adequate precision value of 122.303 indicates that the CCF model can be used. The coefficient of variation (0.54%) indicates the reliability of the model. The dose of gamma irradiation (kGy) and the concentration of dye (mg/L) showed significant effects on the degradation of RR 120, while a difference of 6 to 10% degradation was observed in extending the pH towards the acid or alkali range from pH 7.00. The maximum concentration of dye degraded was observed as 347.509 mg/L at initial pH 7.0, dose of gamma irradiation 5.94 kGy and initial concentration of dye 500 mg/L. This predicted value was found to be in agreement with the experimental value on the optimised conditions.
Texto completo:
1
Coleções:
01-internacional
Contexto em Saúde:
2_ODS3
Base de dados:
MEDLINE
Assunto principal:
Triazinas
/
Poluentes Químicos da Água
/
Eliminação de Resíduos Líquidos
/
Radioisótopos de Cobalto
/
Corantes
/
Raios gama
Tipo de estudo:
Prognostic_studies
Idioma:
En
Revista:
Water Sci Technol
Ano de publicação:
2016
Tipo de documento:
Article