TY - JOUR
T1 - Simultaneous removal of several pharmaceuticals and arsenic on Zn-Fe mixed metal oxides
T2 - Combination of photocatalysis and adsorption
AU - Di, Guanglan
AU - Zhu, Zhiliang
AU - Zhang, Hua
AU - Zhu, Jianyao
AU - Lu, Hongtao
AU - Zhang, Wei
AU - Qiu, Yanling
AU - Zhu, Linyan
AU - Küppers, Stephan
N1 - Publisher Copyright:
© 2017 Elsevier B.V.
PY - 2017
Y1 - 2017
N2 - A series of ZnFe-MMOs were synthesized by in situ topotactic transformation of ZnFe-LDH precursors, and screened for obtaining an efficient functional material used in the simultaneous removal of pharmaceuticals and arsenic. In a mono-component system, the photodegradation efficiency of ibuprofen with optimal ZnFe-MMOs can reach 95.7% under simulated solar irradiation and the maximum adsorption capacity of arsenic was up to 176.3 mg·g−1. In the binary system of ibuprofen and arsenic, the degrading activity of ibuprofen inordinately decreased depending on both the arsenic species and concentrations, while the presence of ibuprofen had no significant impact on arsenic removal. The potential application of ZnFe-MMOs for the simultaneous removal of several pharmaceuticals (ibuprofen, acetaminophen and diclofenac) and arsenic in actual water matrix was also investigated. After 12 h, arsenic concentration decreased from 1000 to 1.61 μg·L−1 and no pharmaceutical was detected. Possible mechanisms were revealed, indicating that photogenerated h+ was primary reactive species for the photodegradation of ibuprofen, and arsenic species including As(III) and As(V) were removed by the combination of photocatalytic oxidation and surface complexation adsorption. Furthermore, ZnFe-MMOs exhibited good reusability after regeneration, rendering it a promising multi-functional material for the decontamination of polluted water with the coexistent pharmaceuticals and arsenic pollutants.
AB - A series of ZnFe-MMOs were synthesized by in situ topotactic transformation of ZnFe-LDH precursors, and screened for obtaining an efficient functional material used in the simultaneous removal of pharmaceuticals and arsenic. In a mono-component system, the photodegradation efficiency of ibuprofen with optimal ZnFe-MMOs can reach 95.7% under simulated solar irradiation and the maximum adsorption capacity of arsenic was up to 176.3 mg·g−1. In the binary system of ibuprofen and arsenic, the degrading activity of ibuprofen inordinately decreased depending on both the arsenic species and concentrations, while the presence of ibuprofen had no significant impact on arsenic removal. The potential application of ZnFe-MMOs for the simultaneous removal of several pharmaceuticals (ibuprofen, acetaminophen and diclofenac) and arsenic in actual water matrix was also investigated. After 12 h, arsenic concentration decreased from 1000 to 1.61 μg·L−1 and no pharmaceutical was detected. Possible mechanisms were revealed, indicating that photogenerated h+ was primary reactive species for the photodegradation of ibuprofen, and arsenic species including As(III) and As(V) were removed by the combination of photocatalytic oxidation and surface complexation adsorption. Furthermore, ZnFe-MMOs exhibited good reusability after regeneration, rendering it a promising multi-functional material for the decontamination of polluted water with the coexistent pharmaceuticals and arsenic pollutants.
KW - Arsenic
KW - Mixed metal oxides
KW - Pharmaceuticals
KW - Simultaneous removal
UR - http://www.scopus.com/inward/record.url?scp=85023208718&partnerID=8YFLogxK
U2 - 10.1016/j.cej.2017.06.112
DO - 10.1016/j.cej.2017.06.112
M3 - Journal article
AN - SCOPUS:85023208718
SN - 1385-8947
VL - 328
SP - 141
EP - 151
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
ER -