TY  - 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 . .