TY - JOUR
T1 - Zirconium-loaded magnetic interpenetrating network chitosan/poly(vinyl alcohol) hydrogels for phosphorus recovery from the aquatic environment
AU - Wan, Jun
AU - Zhu, Chang
AU - Hu, Jiong
AU - Zhang, Tian C.
AU - Richter-Egger, Dana
AU - Feng, Xiaonan
AU - Zhou, Aijiao
AU - Tao, Tao
N1 - Funding Information:
The authors would like to thank Chinese Scholarship Committee (CSC), National Natural Science Foundation of China (Grant No. 51608216 and 51308239), and the Fundamental Research Funds for the Central Universities, HUST (Grant No. 2017KFYXJJ216) for financial support. The authors would like to thank the University of Nebraska-Lincoln (UNL) for providing laboratory space, facilities, testing materials and chemical supplies for conducting this study. The authors also thank the Department of Civil Engineering at UNL, the Department of Chemistry of the University of Nebraska at Omaha (UNO) and the Analytical and Testing Center of the Huazhong University of Science and Technology for related analyses.
Publisher Copyright:
© 2017 Elsevier B.V.
PY - 2017/11/30
Y1 - 2017/11/30
N2 - Phosphorus (P) recovery from the aquatic environment by sorption depends mainly on effective sorbents. In this study, a novel zirconium-loaded magnetic chitosan/poly(vinyl alcohol) interpenetrating network (IPN) hydrogel was synthesized, characterized with different methods and then tested for P sorption. The effects of sorbent dosage, pH, co-existing anions and natural organic matter (NOM) were investigated. Isotherm results showed monolayer sorption was dominant. The max sorption capacity reached at pH = 5. Thermodynamically, the sorption process was spontaneous and exothermic. The pseudo-first-order kinetic model and intra-particle diffusion model fitted experimental data well. Besides, the hydrogels exhibited selectivity towards P sorption, and its maximum sorption capacity was favorable compared with other sorbents. Results of desorption and regeneration illustrate that the sorption capacity of hydrogels stayed relatively high and stable. The sorption mechanism was inner-sphere complex and ligand exchange. This study provides a promising sorbent for P recovery from the aqueous environment.
AB - Phosphorus (P) recovery from the aquatic environment by sorption depends mainly on effective sorbents. In this study, a novel zirconium-loaded magnetic chitosan/poly(vinyl alcohol) interpenetrating network (IPN) hydrogel was synthesized, characterized with different methods and then tested for P sorption. The effects of sorbent dosage, pH, co-existing anions and natural organic matter (NOM) were investigated. Isotherm results showed monolayer sorption was dominant. The max sorption capacity reached at pH = 5. Thermodynamically, the sorption process was spontaneous and exothermic. The pseudo-first-order kinetic model and intra-particle diffusion model fitted experimental data well. Besides, the hydrogels exhibited selectivity towards P sorption, and its maximum sorption capacity was favorable compared with other sorbents. Results of desorption and regeneration illustrate that the sorption capacity of hydrogels stayed relatively high and stable. The sorption mechanism was inner-sphere complex and ligand exchange. This study provides a promising sorbent for P recovery from the aqueous environment.
KW - Chitosan (CS)
KW - Hydrogel
KW - Interpenetrating network (IPN)
KW - Phosphorus recovery
KW - Poly (vinyl alcohol)
KW - Zirconium
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U2 - 10.1016/j.apsusc.2017.06.201
DO - 10.1016/j.apsusc.2017.06.201
M3 - Article
AN - SCOPUS:85021299390
VL - 423
SP - 484
EP - 491
JO - Applied Surface Science
JF - Applied Surface Science
SN - 0169-4332
ER -