Abstract :
Because the current social water pollution is serious, and the conventional method cannot eff ectively manage all types of water pollution, and its single eff ect cannot be satisfactory, we must seek new and eff ective treatment. The paper is a comprehensive review of the best practices of the conventional wastewater treatment method with reference to the experiments and research results of nanotechnology in sewage treatment. Comparison of nanotechnology can be compared with conventional methods to make the particles have a special function, and some special performance just in the sewage treatment medium to a good effect: the depth of the catalytic method can be effective in the decomposition of many types of organic pollutants such as halogenated hydrocarbons Class, chlorinated phenols, cyanide, various organic acids and can handle metal particles; adsorption method for the water heavy metal pollution treatment costs less, simple and widely used, nanofi ltration membrane can replace the adsorption and electrochemical methods, Pulping and precipitation are one of the most eff ective methods for the treatment of colloidal wastewater. It can eff ectively reduce the turbidity and chroma of waste water, remove a variety of macromolecular organic matter and some heavy metal ions ( Mercury and lead); organic / inorganic composite nanoparticles with its excellent inorganic materials, light, electricity, magnetic and other properties, organic materials, excellent processing performance, biocompatibility, for many diffi cult to deal with water pollution control, which has a corresponding method, can be simple and eff ective to solve the problem. The application of nanotechnology in water treatment has shown a broad prospect, but needs further research and improvement.
Keyword :
Sewage treatment; nanotechnology; photocatalysis; nano fl occulation; nanofi ltration