复配缓释凝胶吸附处理剂的制备及其除磷释氧性能

研制了海藻酸钠包埋壳聚糖凝胶小球和海藻酸钠/聚乙二醇4000复合包埋纳米过氧化钙缓释凝胶小球复配处理剂,考察其对水体中磷和有机物的去除效果及机理,采用X射线衍射、扫描电镜、元素能谱仪技术表征材料物化及形貌特征.该处理剂能够高效去除水中单一的磷和有机污染物,且对磷和甲基橙复合污染也具有较高的去除率;在实际河道水体中,该处...

Preparation of composite slow-release gel agent and its performance on phosphorus removal and oxygen release

The water treatment agent composited by the sodium alginate encapsulated chitosan gel beads and the nano calcium peroxide gel beads coated with sodium alginate/polyethylene glycol 4000 were prepared to investigate its performance and mechanisms in the removal of phosphorus and organic matters in water. The physicochemical properties and morphology of the agent were characterized by X-ray diffraction, scanning electron microscope and elemental energy dispersive spectrometer. This composited water treatment agent can effectively remove single phosphorus or organic matters in water, and also has high removal efficiency for the complex phosphorus and methyl orange pollutants. The water treatment agent has higher adsorptive ability for phosphorus at high concentrationa real river. The slow release of oxygen can maintain the mass concentration of dissolved oxygen above 4. 5 mg/L, therefore providing better aerobic condition for microorganisms in muddy-water interface and elevating the ability of self-purification of water.