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首页> 美国卫生研究院文献>International Journal of Molecular Sciences >Investigation of Self-Assembly Processes for Chitosan-Based Coagulant-Flocculant Systems: A Mini-Review
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Investigation of Self-Assembly Processes for Chitosan-Based Coagulant-Flocculant Systems: A Mini-Review

机译：基于壳聚糖的混凝剂-絮凝剂系统自组装过程的研究：迷你审查。

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The presence of contaminants in wastewater poses significant challenges to water treatment processes and environmental remediation. The use of coagulation-flocculation represents a facile and efficient way of removing charged particles from water. The formation of stable colloidal flocs is necessary for floc aggregation and, hence, their subsequent removal. Aggregation occurs when these flocs form extended networks through the self-assembly of polyelectrolytes, such as the amine-based polysaccharide (chitosan), which form polymer “bridges” in a floc network. The aim of this overview is to evaluate how the self-assembly process of chitosan and its derivatives is influenced by factors related to the morphology of chitosan (flocculant) and the role of the solution conditions in the flocculation properties of chitosan and its modified forms. Chitosan has been used alone or in conjunction with a salt, such as aluminum sulphate, as an aid for the removal of various waterborne contaminants. Modified chitosan relates to grafted anionic or cationic groups onto the C-6 hydroxyl group or the amine group at C-2 on the glucosamine monomer of chitosan. By varying the parameters, such as molecular weight and the degree of deacetylation of chitosan, pH, reaction and settling time, dosage and temperature, self-assembly can be further investigated. This mini-review places an emphasis on the molecular-level details of the flocculation and the self-assembly processes for the marine-based biopolymer, chitosan.
机译：废水中污染物的存在对水处理过程和环境修复提出了重大挑战。混凝-絮凝的使用代表了从水中去除带电颗粒的简便有效的方法。稳定的胶体絮凝物的形成对于絮凝物的聚集是必要的，因此，随后将其除去。当这些絮凝物通过聚电解质（例如基于胺的多糖（壳聚糖））的自组装形成扩展的网络时，就会发生聚集，这会在絮凝物网络中形成聚合物“桥”。本概述的目的是评估壳聚糖及其衍生物的自组装过程如何受到与壳聚糖（絮凝剂）的形态有关的因素以及溶液条件在壳聚糖及其修饰形式的絮凝特性中的作用的影响。壳聚糖已被单独使用或与盐（例如硫酸铝）结合使用，以帮助去除各种水性污染物。改性的壳聚糖涉及在壳聚糖的葡糖胺单体上的C-6羟基或C-2的胺基上接枝的阴离子或阳离子基团。通过改变分子量，壳聚糖脱乙酰度，pH，反应和沉降时间，剂量和温度等参数，可以进一步研究自组装。这份小型综述着重于海洋生物聚合物壳聚糖的絮凝和自组装过程的分子水平细节。

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