Noè Camilla, Zanon Michael, Arencibia Amaya, López-Muñoz María-José, Fernández de Paz Nieves, Calza Paola, Sangermano Marco
Politecnico di Torino, Dipartimento di Scienza Applicata e Tecnologia, C.so Duca Degli Abruzzi 24, 10129 Torino, Italy.
Departamento de Tecnología Química, Energética y Mecánica, ESCET, Universidad Rey Juan Carlos, C/Tulipán s/n, Móstoles, 28933 Madrid, Spain.
Polymers (Basel). 2022 Mar 21;14(6):1268. doi: 10.3390/polym14061268.
In this study, new photocurable biobased hydrogels deriving from chitosan and gelatin are designed and tested as sorbents for As(V) and Pb(II) removal from water. Those renewable materials were modified by a simple methacrylation reaction in order to make them light processable. The success of the reaction was evaluated by both H-NMR and FTIR spectroscopy. The reactivity of those formulations was subsequently investigated by a real-time photorheology test. The obtained hydrogels showed high swelling capability reaching up to 1200% in the case of methacrylated gelatin (GelMA). Subsequently, the Z-potential of the methacrylated chitosan (MCH) and GelMA was measured to correlate their electrostatic surface characteristics with their adsorption properties for As(V) and Pb(II). The pH of the solutions proved to have a huge influence on the As(V) and Pb(II) adsorption capacity of the obtained hydrogels. Furthermore, the effect of As(V) and Pb(II) initial concentration and contact time on the adsorption capability of MCH and GelMA were investigated and discussed. The MCH and GelMA hydrogels demonstrated to be promising sorbents for the removal of heavy metals from polluted waters.
在本研究中，设计并测试了由壳聚糖和明胶衍生的新型光固化生物基水凝胶，作为从水中去除砷（V）和铅（II）的吸附剂。通过简单的甲基丙烯酸酯化反应对这些可再生材料进行改性，使其易于进行光加工。通过氢核磁共振（H-NMR）光谱和傅里叶变换红外光谱（FTIR）对反应的成功进行了评估。随后通过实时光流变测试研究了这些配方的反应活性。所获得的水凝胶显示出高溶胀能力，甲基丙烯酸酯化明胶（GelMA）的溶胀率高达1200%。随后，测量了甲基丙烯酸酯化壳聚糖（MCH）和GelMA的Zeta电位，以将其静电表面特性与其对砷（V）和铅（II）的吸附性能相关联。结果表明，溶液的pH值对所获得水凝胶对砷（V）和铅（II）的吸附容量有巨大影响。此外，还研究并讨论了砷（V）和铅（II）初始浓度及接触时间对MCH和GelMA吸附能力的影响。MCH和GelMA水凝胶被证明是从污染水中去除重金属的有前景的吸附剂。
