絮凝法是水处理中最简单、最常用的一种方法,在水处理中占据着非常重要的地位,此方法比较关键的问题就是如何选择和使用絮凝剂。科学技术的发展使絮凝剂逐渐从单一化转变为多样化,它的开发和研究也从有毒、难生物降解型逐渐发展到高效、低毒、对环境友好等复合型高效絮凝剂和微生物絮凝剂。纳米材料和纳米技术的发展促进了复合絮凝剂的发展,同时,也给絮凝沉淀技术注入了新鲜的血液。纳米粒子因为具有表面原子数量多、粒子比表面积大、比表面能高等优点,所以制备 Flocculation is one of the simplest and most commonly used methods in water treatment. It occupies a very important position in water treatment. The key issue of this method is how to choose and use flocculants. The development of science and technology makes the flocculant gradually change from single to diversified, and its development and research from toxic, difficult to biodegradable gradually developed to efficient, low toxicity, environmentally friendly compound efficient flocculant and microbial flocculant . The development of nanomaterials and nanotechnology has contributed to the development of complex flocculants, and at the same time, injected fresh blood into the flocculation and sedimentation technology. Nanoparticles because of having a large number of surface atoms, the particle surface area, the specific surface energy advantages, so preparation