摘要:水环境污染已经成为全球重要的环境问题之一。水体污染影响工业生产、增大设备腐蚀、影响产品质量，甚至使生产不能进行下去。水的污染，又影响人类生活，破坏生态，直接危害人的健康，损害很大。

　　　人类日常使用的水受到污染后，通过饮水或食物链，污染物进入人体，使人急性或慢性中毒。工农业生产使用的水受到污染后，工业用水必须投入更多的处理费用，造成资源、能源的浪费，食品工业用水要求更为严格，水质不合格，会使生产停顿。这也是工业企业效益不高，质量不好的因素。农业使用污水，使作物减产，品质降低，甚至使人畜受害，大片农田遭受污染，降低土壤质量。含有大量氮、磷、钾的生活污水的排放，大量有机物在水中降解放出营养元素，促进水中藻类丛生，植物疯长，使水体通气不良，溶解氧下降，甚至出现无氧层。以致使水生植物大量死亡，水面发黑，水体发臭形成“死湖”、“死河”、“死海”，进而变成沼泽。

　　　本文在系统收集和认真阅读大量国内外有关资料文献的基础上，通过实验、分析和评述，指出气浮混凝剂的合理应用技术是净化水环境的重要技术措施之一。通过改性聚硅铁投加于污水中后，污水中PH、电导率、TDS、浊度、氮磷含量等指标与原水的比较，来分析这种气浮混凝剂的性能优点。

　　　本课题旨在对气浮混凝剂的应用性能，特别是改性聚硅铁对污水的净化作用做一定的试验研究，为未来气浮混凝剂能更好的应用于水处理工艺做一定的参考依据。

关键词: 水污染治理，气浮混凝剂，改性聚硅铁，净化，实验研究

Abstract:Water pollution has become a global one of important environmental problems. Water pollution affects industrial production and increase the equipment corrosion, affect the quality of products, and even make production cannot proceed. Water pollution, and influence human life, damage the ecological, directly harmful to people's health, damage greatly.

　　　Human daily use water contaminated water or food chain, through after, pollutants enter human body, make the person acute or chronic poisoning. Industrial and agricultural production use water is polluted, industrial water must be more the treatment cost, causing the waste of resources, energy and food industrial water requirements more stringent, water quality is unqualified, can make production pause. This also is industrial enterprise efficiency is not high, quality is bad factors. Farming USES sewage, make the crop, quality is reduced, and even make human and livestock suffer, farmland contaminated, reducing soil quality. Contains a lot of nitrogen, phosphorus, potassium life sewage discharge, a large number of organic matter degradation in water out nutrition elements, promote the water algae, forested, and plants, make water ventilation adverse maintained, dissolved oxygen drops, appear even anaerobic layer. Massive death to the aquatic plants, water, and water formed a "stinking black death lake", "dead river" and "Dead Sea", then become a swamp.

　　　Based on the system to collect and carefully read plenty of domestic and foreign relevant data, on the basis of literature review through experiment and analysis, and points out that with air-float coagulant the reasonable application of technology is an important technical measures of water environment of one. Through the modified polyethylene ferrosilicon dosing in sewage, sewage PH, conductivity, TDS, turbidity, nitrogen, phosphorus content and index and raw comparison, to analyze this floating coagulant performance advantages.

　　　This project aims to floating coagulant application properties, especially the modified polyethylene ferrosilicon of the sewage purification do certain test for future research, air-float coagulant can better applied in water treatment process to a certain reference.

Key words: water pollution, air coagulant, Modified ferrosilicon, purification, experimental study