Response surface methodology directed synthesis of luminescent nanocomposite hydrogel for trapping anionic dyes.
J Environ Manage
; 231: 380-390, 2019 Feb 01.
Article
em En
| MEDLINE
| ID: mdl-30368147
ABSTRACT
The present research work reveals semi-interpenetrating network (semi-IPN) synthesis using response surface methodology-central composite design (RSM-CCD) based optimization. The maximum swelling of 362.11% was obtained with monomer, crosslinker and initiator concentrations 4.39â¯molâ¯L-1, 1.52â¯molâ¯L-1 and 4.58â¯molâ¯L-1, respectively, temperature 70⯰C, time 3â¯h and pH 4.0. The synthesized hydrogel showed 94.16% and 95.62% removal for eosin yellow (EY) and eriochrome black-T (EBT) dyes, respectively. The incorporation of cadmium sulphide nanodots into the hydrogel network enhanced the % dye removal (96.82% EY and 98.73% EBT) along with fluorescent behavior. Various conditions optimized for EY and EBT dye removal with respect to semi-IPN were 0.4â¯g adsorbent dose each, dye concentrations 10â¯mgâ¯L-1 and 120â¯mgâ¯L-1, contact time 24â¯h each, respectively. Adsorption studies followed langmuir theory for both dyes. Second order and first order kinetics along with intraparticle diffusion of dye molecules were favorable to EY and EBT, respectively. Thermodynamic study reveals exothermic nature of adsorption. Recyclability of the adsorbent is superior as tested by desorption-adsorption tests.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Corantes
/
Nanocompostos
Idioma:
En
Revista:
J Environ Manage
Ano de publicação:
2019
Tipo de documento:
Article
País de afiliação:
Índia