TY - JOUR
T1 - Surface functionalised adsorbent for emerging pharmaceutical removal
T2 - Adsorption performance and mechanisms
AU - Turk Sekulic, Maja
AU - Boskovic, Nikola
AU - Slavkovic, Aleksandar
AU - Garunovic, Jelena
AU - Kolakovic, Srdana
AU - Pap, Sabolc
N1 - We thank the Ministry of Education, Science and Technological Development of the Republic of Serbia (Projects: III46009 and TR34014 ) for supporting this research. Authors are also thankful to Dr. Mark A. Taggart and Dr. Kenneth Boyd for their help in data interpretation.
PY - 2019/5
Y1 - 2019/5
N2 - А highly effective adsorbent (PPhA) was designed using “acid catalyst” functionalisation and tested for six emerging PhCs (sulfamethoxazole (SMX), carbamazepine (CBZ), ketoprofen (KP), naproxen (NPX), diclofenac (DCF) and ibuprofen (IBF)) in a batch study. Characterisation results (BET, SEM, FTIR, XRD and pHzpc) showed that the functionalisation process generates a microporous material with a multitude of new functional groups (such as phosphate and phosphonate) present on the surface. Adsorption capacity reached near maximum within 10 min while equilibrium was obtained in 60 min. Findings suggest that the mass transfer was governed mainly by intraparticle diffusion processes through formation of H-bonds, π–π and n–π electron donor–acceptor interactions. A pH influence study showed that electrostatic interactions played a minor role in the overall removal mechanism. The magnitude of E was <8 kJ mol−1 for all studied PhCs, indicating that adsorption is mainly due to physisorption. Equilibrium data were best represented by the Freundlich model and the theoretical monolayer adsorption capacities were 17.193, 17.685, 19.265, 17.657, 21.116 and 23.332 mg g−1 for SMX, CBZ, KP, NPX, DCF and IBF, respectively. Based on these results, this PPhA is proposed as an excellent adsorbent for PhC removal.
AB - А highly effective adsorbent (PPhA) was designed using “acid catalyst” functionalisation and tested for six emerging PhCs (sulfamethoxazole (SMX), carbamazepine (CBZ), ketoprofen (KP), naproxen (NPX), diclofenac (DCF) and ibuprofen (IBF)) in a batch study. Characterisation results (BET, SEM, FTIR, XRD and pHzpc) showed that the functionalisation process generates a microporous material with a multitude of new functional groups (such as phosphate and phosphonate) present on the surface. Adsorption capacity reached near maximum within 10 min while equilibrium was obtained in 60 min. Findings suggest that the mass transfer was governed mainly by intraparticle diffusion processes through formation of H-bonds, π–π and n–π electron donor–acceptor interactions. A pH influence study showed that electrostatic interactions played a minor role in the overall removal mechanism. The magnitude of E was <8 kJ mol−1 for all studied PhCs, indicating that adsorption is mainly due to physisorption. Equilibrium data were best represented by the Freundlich model and the theoretical monolayer adsorption capacities were 17.193, 17.685, 19.265, 17.657, 21.116 and 23.332 mg g−1 for SMX, CBZ, KP, NPX, DCF and IBF, respectively. Based on these results, this PPhA is proposed as an excellent adsorbent for PhC removal.
KW - Adsorption mechanism
KW - Competitive adsorption
KW - Functionalisation
KW - Pharmaceuticals
KW - Waste recycling
KW - Water management
UR - http://www.scopus.com/inward/record.url?scp=85062853303&partnerID=8YFLogxK
U2 - 10.1016/j.psep.2019.03.007
DO - 10.1016/j.psep.2019.03.007
M3 - Article
AN - SCOPUS:85062853303
SN - 0957-5820
VL - 125
SP - 50
EP - 63
JO - Process Safety and Environmental Protection
JF - Process Safety and Environmental Protection
ER -
