Abstract

The contamination of water by Pb²⁺ ions is a problem that requires an imminent solution. Design of hydrogels based on polymers as well as inorganic phases is an innovative alternative for the generation of matrices with adapted properties. This work proposes the synthesis of a novel composite hydrogel based on collagen-polyurethane-chitosan reinforced with manganite; this inorganic phase increases the velocity of the adsorption process of the Pb²⁺ ions. The effect of the concentration of manganite on the properties of composite hydrogels is studied. The results indicate that the composite reinforced with manganite presents an amorphous structure, improved mechanical properties and resistance to the both acidic and proteolytic degradation. The hydrogel with 35 wt% of manganite show a removal rate of Pb²⁺ of 91 ± 6% at 24 h. These hydrogel composites could represent an efficient and sustainable alternative for the removal of Pb²⁺ ions from contaminated water.

Graphic Abstract

中文翻译：

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新型锰-壳聚糖增强的胶原-壳聚糖基水凝胶作为Pb 2+离子的潜在吸附剂

摘要

Pb ²⁺离子对水的污染是需要立即解决的问题。基于聚合物和无机相的水凝胶设计是产生具有适应性的基质的一种创新替代方法。这项工作提出了一种新型的复合水凝胶的合成方法，该复合水凝胶是基于锰矿增强的胶原蛋白-聚氨酯-壳聚糖​​。该无机相增加了Pb ²⁺的吸附过程的速度离子。研究了锰矿浓度对复合水凝胶性能的影响。结果表明，用锰铁矿增强的复合材料具有无定形结构，改善的机械性能以及对酸性和蛋白水解降解的抵抗力。含35 wt％锰的水凝胶在24 h时的Pb ²⁺去除率为91±6％。这些水凝胶复合材料可以代表一种从污染水中去除Pb ²⁺离子的有效且可持续的替代方法。

图形摘要