TY - JOUR
T1 - Enhanced removal of soluble and insoluble dyes over hierarchical zeolites
T2 - Effect of synthesis condition
AU - Iryani, Ani
AU - Masudi, Ahmad
AU - Rozafia, Ade I.
AU - Hartanto, Djoko
AU - Santoso, Mardi
AU - Nur, Hadi
AU - Azami, Mohammad S.
N1 - Publisher Copyright:
© 2020 by the authors.
PY - 2020/9
Y1 - 2020/9
N2 - A hierarchical zeolite ZSM-5 with micro and meso-pore was prepared by optimising the most affecting parameter in sequence of desilication and dealumination. The physicochemical properties of zeolite were characterised with XRD, nitrogen adsorption-desorption, FTIR and SEM. The potential of this zeolite for decolorisation of CR, RY, MB, RhB, DB-1 and DB-14 was evaluated with adsorption isotherm, thermodynamics, kinetics, and influencing parameter for adsorption. The unique modification of ZSM-5 resulted in lower crystallinity, easier porosity control, rich terminal silanol and unbridged silanol groups which assisted in higher adsorption capacity. The adsorption capacity of the optimum ZSM-5 was 323, 435, 589, 625, 61 and 244 mg/g for CR, RY, MB, RhB, DB-1 and DB-14, respectively. The dye adsorption progressed through pseudo-first-order kinetic and close to the Langmuir model. The adsorption mechanism is proposed mainly through interaction between deprotonated silanol site and the electron-rich dye site.
AB - A hierarchical zeolite ZSM-5 with micro and meso-pore was prepared by optimising the most affecting parameter in sequence of desilication and dealumination. The physicochemical properties of zeolite were characterised with XRD, nitrogen adsorption-desorption, FTIR and SEM. The potential of this zeolite for decolorisation of CR, RY, MB, RhB, DB-1 and DB-14 was evaluated with adsorption isotherm, thermodynamics, kinetics, and influencing parameter for adsorption. The unique modification of ZSM-5 resulted in lower crystallinity, easier porosity control, rich terminal silanol and unbridged silanol groups which assisted in higher adsorption capacity. The adsorption capacity of the optimum ZSM-5 was 323, 435, 589, 625, 61 and 244 mg/g for CR, RY, MB, RhB, DB-1 and DB-14, respectively. The dye adsorption progressed through pseudo-first-order kinetic and close to the Langmuir model. The adsorption mechanism is proposed mainly through interaction between deprotonated silanol site and the electron-rich dye site.
KW - Adsorption
KW - Hierarchical zeolite
KW - Insoluble dye
KW - Silanol
KW - Soluble dye
KW - Surface area
UR - http://www.scopus.com/inward/record.url?scp=85092613922&partnerID=8YFLogxK
U2 - 10.3390/INORGANICS8090052
DO - 10.3390/INORGANICS8090052
M3 - Article
AN - SCOPUS:85092613922
SN - 2304-6740
VL - 8
JO - Inorganics
JF - Inorganics
IS - 9
M1 - 52
ER -