College of Chemistry & Chemical Engineering, Qingdao University, 308 Ningxia Road, Qingdao, 266071, PR China.
College of Chemistry & Chemical Engineering, Qingdao University, 308 Ningxia Road, Qingdao, 266071, PR China.
Carbohydr Polym. 2017 Aug 15;170:182-189. doi: 10.1016/j.carbpol.2017.04.069. Epub 2017 Apr 27.
The flocculant made from natural polymers gained prominence in recent years due to its eco-friendliness and low cost. In this study, two natural polymers of chitosan and fulvic acid were successfully grafted with a synthetic monomer of acrylamide as a new type of flocculant. The prepared chitosan-acrylamide-fulvic acid (CAMFA) exhibited an excellent capacity to remove three typical dyes, the color removal ratios were 97.0%, 91.6%, and 38.2%, respectively, at the dosage of 283mg/L for 100mg/L of acid blue 113, reactive black 5 and methyl orange. The main flocculation mechanisms were charge neutralization and bridging effect. CAMFA showed nice flocculation performance with solubility in pure water, high removal efficiency, broad pH effectiveness scope, and a wide flocculation window. The ternary copolymer based on natural polymers is a promising candidate as a flocculant from the perspective of effectiveness, operation simplicity and cost.
近年来，由于天然聚合物絮凝剂具有环境友好、成本低等优点，引起了人们的关注。在本研究中，成功地将壳聚糖和富里酸两种天然聚合物与丙烯酰胺的合成单体接枝，得到了一种新型絮凝剂。制备的壳聚糖-丙烯酰胺-富里酸（CAMFA）对三种典型染料具有优异的去除能力，在投加量为 283mg/L 时，对 100mg/L 的酸性蓝 113、活性黑 5 和甲基橙的去除率分别为 97.0%、91.6%和 38.2%。主要的絮凝机理是电荷中和和桥联作用。CAMFA 在纯水中具有良好的溶解性、高去除效率、较宽的 pH 有效性范围和较宽的絮凝窗口，是一种很有前途的絮凝剂。从有效性、操作简便性和成本角度来看，基于天然聚合物的三元共聚物是一种很有前途的絮凝剂。
