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针对冬季低温低浊水的水质特性,研究了无机-有机复合絮凝剂PFM-PDMDAAC的絮凝效果及其微观形态。试验结果表明:对于冬季低温低浊水的处理,PFM-PDMDAAC的絮凝效果显著优于传统无机絮凝剂PFS和PAC,在最佳投药量范围内,对浊度和DOC的去除率分别达到了95%和55%以上。对PFM-PDMDAAC水解产物Zeta的电位研究表明,在PFM中引入PDMDAAC可显著提高絮凝剂表面电荷,增强絮凝剂产品的电中和能力。红外光谱分析结果显示,PFMPDMDAAC是一种不同于制备前驱物的共聚物。PFM-PDMDAAC对冬季低温低浊水的主要絮凝机理以吸附电中和为主,同时粘附架桥也起到了一定的作用。
According to the water quality characteristics of low temperature and low turbidity water in winter, the flocculation effect and its microscopic morphology of inorganic-organic composite flocculant PFM-PDMDAAC were studied. The experimental results show that PFM-PDMDAAC has better flocculation effect than traditional inorganic flocculant PFS and PAC for the treatment of low temperature and low turbidity water in winter, and the turbidity and DOC removal rates reach 95 % And 55% or more. Potential studies on the zeta potential of the PFM-PDMDAAC hydrolyzate showed that the introduction of PDMDAAC in the PFM significantly increased the surface charge of the flocculant and enhanced the electric neutralization ability of the flocculant product. The results of FTIR spectroscopy showed that PFMPDMDAAC was a copolymer different from that of the precursor. The main flocculation mechanism of PFM-PDMDAAC to low temperature and low turbidity water in winter is mainly adsorption neutralization, and it also plays a certain role in the adhesion of bridges.