TY - JOUR
T1 - Systematic activation of potassium peroxydisulfate with ZIF-8 via sono-assisted catalytic process
T2 - Mechanism and ecotoxicological analysis
AU - Jamal Sisi, Abdollah
AU - Fathinia, Mehrangiz
AU - Khataee, Alireza
AU - Orooji, Yasin
N1 - Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2020/6/15
Y1 - 2020/6/15
N2 - Powerful and suitable combination of different advanced oxidation processes (AOPs) has raised a new challenge in recent years. Since the generation of synergistic phenomenon is vital in the final integrated process, there is still an urgent demand for developing a superior hybrid AOPs, which is synergistically effective, simply and economically prepared and operated. Herein, a novel combination of ZIF-8 nanomaterials (NMs) and sonolysis process was utilised for efficient activation of potassium peroxydisulfate (PDS), leading to the establishment of a novel combined sono-assisted indirect photocatalytic process. ZIF-8 NMs were fabricated by a facial and green synthesis method at room temperature. The XRD, TEM, and BET analyses confirmed the successful production of porous ZIF-8 nanomaterials with sodalite (SOD) topology and hexagonal shapes including the specific surface area of 1484.28 m2/g. Besides, the effects of operational parameters including pH, ZIF-8, and PDS, Acid Blue 7 (AB7) concentration and ultrasonic bath power (UBP) were investigated on three response parameters consisting of AB7 removal efficiency (RE (%)), pseudo-first-order kinetic rate constant (kapp) and synergistic factor (SF). Optimum operating conditions were determined as pH = 5, [ZIF-8] = 0.6 g/L, [PDS] = 0.6 mmol/L in which maximum SF of 1.45 was achieved. The concurrent decomposition of S2O8 2−, HSO5 −, H2O2, and AB7 on the active sites of ZIF-8 NMs were responsible for degradation. Based on the identified by-products via GC–MS technique, the AB7 sonocatalytic degradation mechanism was proposed. Finally, valuable efforts were made to assess the ecotoxicological effects of AB7, ZIF-8 NMs and the produced intermediates under optimised operating conditions. Sono-assisted indirect photocatalytic process in the presence of ZIF-8 NMs activated PDS can be noticed as an acceptable and green integrated process due to its high SF and novel features.
AB - Powerful and suitable combination of different advanced oxidation processes (AOPs) has raised a new challenge in recent years. Since the generation of synergistic phenomenon is vital in the final integrated process, there is still an urgent demand for developing a superior hybrid AOPs, which is synergistically effective, simply and economically prepared and operated. Herein, a novel combination of ZIF-8 nanomaterials (NMs) and sonolysis process was utilised for efficient activation of potassium peroxydisulfate (PDS), leading to the establishment of a novel combined sono-assisted indirect photocatalytic process. ZIF-8 NMs were fabricated by a facial and green synthesis method at room temperature. The XRD, TEM, and BET analyses confirmed the successful production of porous ZIF-8 nanomaterials with sodalite (SOD) topology and hexagonal shapes including the specific surface area of 1484.28 m2/g. Besides, the effects of operational parameters including pH, ZIF-8, and PDS, Acid Blue 7 (AB7) concentration and ultrasonic bath power (UBP) were investigated on three response parameters consisting of AB7 removal efficiency (RE (%)), pseudo-first-order kinetic rate constant (kapp) and synergistic factor (SF). Optimum operating conditions were determined as pH = 5, [ZIF-8] = 0.6 g/L, [PDS] = 0.6 mmol/L in which maximum SF of 1.45 was achieved. The concurrent decomposition of S2O8 2−, HSO5 −, H2O2, and AB7 on the active sites of ZIF-8 NMs were responsible for degradation. Based on the identified by-products via GC–MS technique, the AB7 sonocatalytic degradation mechanism was proposed. Finally, valuable efforts were made to assess the ecotoxicological effects of AB7, ZIF-8 NMs and the produced intermediates under optimised operating conditions. Sono-assisted indirect photocatalytic process in the presence of ZIF-8 NMs activated PDS can be noticed as an acceptable and green integrated process due to its high SF and novel features.
KW - Ecotoxicological effect
KW - Mechanism
KW - Metal-organic frameworks
KW - Sonocatalyst
KW - ZIF-8
UR - http://www.scopus.com/inward/record.url?scp=85083036832&partnerID=8YFLogxK
U2 - 10.1016/j.molliq.2020.113018
DO - 10.1016/j.molliq.2020.113018
M3 - Article
AN - SCOPUS:85083036832
SN - 0167-7322
VL - 308
JO - Journal of Molecular Liquids
JF - Journal of Molecular Liquids
M1 - 113018
ER -