Selective adsorption of arsenic over phosphate by transition metal cross-linked chitosan
Само за регистроване кориснике
2021
Аутори
Pincus, Lauren N.Petrovic, Predrag V.
Gonzalez, Isabel S.
Stavitski, Eli
Fishman, Zachary S.
Rudel, Holly E.
Anastas, Paul T.
Zimmerman, Julie B.
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
The ability of transition metal chitosan complexes (TMCs) of varying valence and charge to selectively adsorb As(III) and As(V) over their strongest adsorptive competitor, phosphate is examined. Fe(III)-chitosan, Cu(II)-chitosan, Al(III)-chitosan, Ni(II)-chitosan, and Zn(II)-chitosan are synthesized, characterized via Attenuated Total Reflectance-Fourier Transform Infrared spectroscopy (ATR-FTIR) and X-ray Diffractometry (XRD), and their selective sorption capabilities towards arsenite and arsenate over phosphate are evaluated. It was found that the stability of the metal-chitosan complexes varied, with Al(III)- and Zn(II)-chitosan forming unstable complexes resulting in precipitation of gibbsite, and Wulfingite and zincite, respectively. Cu(II)-, Ni(II)-, and Fe(III)- chitosan formed a mixture of monodentate and bidentate complexes. The TMCs which formed the bidentate complex (Cu(II)-, Ni(II)-, and Fe(III)-) showed greater adsorption capability for arsenate in competitive systems with... phosphate. Using the binary separation factor ∝t/c, it can be shown that only Fe(III)-chitosan is selective for As(V) and As(III) over phosphate. Density Functional Theory (DFT) modeling and extended X-ray absorption fine structure (EXAFS) determined that Fe(III)-chitosan and Ni(II)-chitosan adsorbed As(V) and As(III) via inner-sphere complexation, while Cu(II)-chitosan formed mainly outer-sphere complexes with As(V) and As(III). These differences in complexation likely result in the observed differences in selective adsorption capability towards As(V) and As(III) over phosphate.
Кључне речи:
Selectivity / Arsenic / Adsorption / Chitosan / Phosphate / Adsorption mechanismИзвор:
Chemical Engineering Journal, 2021, 412, 128582Издавач:
- Elsevier
Финансирање / пројекти:
- NSF Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment (ERC-1449500).
Колекције
Институција/група
Inovacioni centar / Innovation CentreTY - JOUR AU - Pincus, Lauren N. AU - Petrovic, Predrag V. AU - Gonzalez, Isabel S. AU - Stavitski, Eli AU - Fishman, Zachary S. AU - Rudel, Holly E. AU - Anastas, Paul T. AU - Zimmerman, Julie B. PY - 2021 UR - http://cherry.chem.bg.ac.rs/handle/123456789/5368 AB - The ability of transition metal chitosan complexes (TMCs) of varying valence and charge to selectively adsorb As(III) and As(V) over their strongest adsorptive competitor, phosphate is examined. Fe(III)-chitosan, Cu(II)-chitosan, Al(III)-chitosan, Ni(II)-chitosan, and Zn(II)-chitosan are synthesized, characterized via Attenuated Total Reflectance-Fourier Transform Infrared spectroscopy (ATR-FTIR) and X-ray Diffractometry (XRD), and their selective sorption capabilities towards arsenite and arsenate over phosphate are evaluated. It was found that the stability of the metal-chitosan complexes varied, with Al(III)- and Zn(II)-chitosan forming unstable complexes resulting in precipitation of gibbsite, and Wulfingite and zincite, respectively. Cu(II)-, Ni(II)-, and Fe(III)- chitosan formed a mixture of monodentate and bidentate complexes. The TMCs which formed the bidentate complex (Cu(II)-, Ni(II)-, and Fe(III)-) showed greater adsorption capability for arsenate in competitive systems with phosphate. Using the binary separation factor ∝t/c, it can be shown that only Fe(III)-chitosan is selective for As(V) and As(III) over phosphate. Density Functional Theory (DFT) modeling and extended X-ray absorption fine structure (EXAFS) determined that Fe(III)-chitosan and Ni(II)-chitosan adsorbed As(V) and As(III) via inner-sphere complexation, while Cu(II)-chitosan formed mainly outer-sphere complexes with As(V) and As(III). These differences in complexation likely result in the observed differences in selective adsorption capability towards As(V) and As(III) over phosphate. PB - Elsevier T2 - Chemical Engineering Journal T1 - Selective adsorption of arsenic over phosphate by transition metal cross-linked chitosan VL - 412 IS - 128582 DO - 10.1016/j.cej.2021.128582 ER -
@article{ author = "Pincus, Lauren N. and Petrovic, Predrag V. and Gonzalez, Isabel S. and Stavitski, Eli and Fishman, Zachary S. and Rudel, Holly E. and Anastas, Paul T. and Zimmerman, Julie B.", year = "2021", abstract = "The ability of transition metal chitosan complexes (TMCs) of varying valence and charge to selectively adsorb As(III) and As(V) over their strongest adsorptive competitor, phosphate is examined. Fe(III)-chitosan, Cu(II)-chitosan, Al(III)-chitosan, Ni(II)-chitosan, and Zn(II)-chitosan are synthesized, characterized via Attenuated Total Reflectance-Fourier Transform Infrared spectroscopy (ATR-FTIR) and X-ray Diffractometry (XRD), and their selective sorption capabilities towards arsenite and arsenate over phosphate are evaluated. It was found that the stability of the metal-chitosan complexes varied, with Al(III)- and Zn(II)-chitosan forming unstable complexes resulting in precipitation of gibbsite, and Wulfingite and zincite, respectively. Cu(II)-, Ni(II)-, and Fe(III)- chitosan formed a mixture of monodentate and bidentate complexes. The TMCs which formed the bidentate complex (Cu(II)-, Ni(II)-, and Fe(III)-) showed greater adsorption capability for arsenate in competitive systems with phosphate. Using the binary separation factor ∝t/c, it can be shown that only Fe(III)-chitosan is selective for As(V) and As(III) over phosphate. Density Functional Theory (DFT) modeling and extended X-ray absorption fine structure (EXAFS) determined that Fe(III)-chitosan and Ni(II)-chitosan adsorbed As(V) and As(III) via inner-sphere complexation, while Cu(II)-chitosan formed mainly outer-sphere complexes with As(V) and As(III). These differences in complexation likely result in the observed differences in selective adsorption capability towards As(V) and As(III) over phosphate.", publisher = "Elsevier", journal = "Chemical Engineering Journal", title = "Selective adsorption of arsenic over phosphate by transition metal cross-linked chitosan", volume = "412", number = "128582", doi = "10.1016/j.cej.2021.128582" }
Pincus, L. N., Petrovic, P. V., Gonzalez, I. S., Stavitski, E., Fishman, Z. S., Rudel, H. E., Anastas, P. T.,& Zimmerman, J. B.. (2021). Selective adsorption of arsenic over phosphate by transition metal cross-linked chitosan. in Chemical Engineering Journal Elsevier., 412(128582). https://doi.org/10.1016/j.cej.2021.128582
Pincus LN, Petrovic PV, Gonzalez IS, Stavitski E, Fishman ZS, Rudel HE, Anastas PT, Zimmerman JB. Selective adsorption of arsenic over phosphate by transition metal cross-linked chitosan. in Chemical Engineering Journal. 2021;412(128582). doi:10.1016/j.cej.2021.128582 .
Pincus, Lauren N., Petrovic, Predrag V., Gonzalez, Isabel S., Stavitski, Eli, Fishman, Zachary S., Rudel, Holly E., Anastas, Paul T., Zimmerman, Julie B., "Selective adsorption of arsenic over phosphate by transition metal cross-linked chitosan" in Chemical Engineering Journal, 412, no. 128582 (2021), https://doi.org/10.1016/j.cej.2021.128582 . .