Synthetic method for poly nano-silica zinc borate iron flocculant

Abstract

The invention discloses a synthetic method for a poly nano-silica zinc borate iron flocculant. An inorganic polymeric flocculant is prepared by utilizing iron sulfate ammonium hexahydrate, zinc peroxide, sodium tetraborate and nano-silica as raw materials, utilizing hydrogen peroxide as an oxidizing agent and carrying out a polymerization reaction by the raw materials and the oxidizing agent at pH of 8.0-10.0 and a temperature of 60-65 DEG C for 6-8h. Compared with a traditional poly ferro-aluminium inorganic polymeric flocculant, the inorganic polymeric flocculant prepared by the synthetic method is high in salt resistance and capable of removing low-concentration nitrogen and phosphorus materials from low-temperature and low-turbidity water particularly; and a removal rate can be as high as more than 99.9%.

Description

technical field [0001] The invention relates to a method for synthesizing an inorganic macromolecule flocculant of polynanometer silicon dioxide zinc iron borate, belonging to the field of chemical synthesis. Background technique [0002] With the concentration of urban population and the development of industry and agriculture, the problem of eutrophication of water bodies has become increasingly prominent. The eutrophication of the water body leads to algae outbreaks and the lack of oxygen in the water body. Nitrogen and phosphorus are the main factors that cause algal blooms. Moreover, nitrogen and phosphorus in drinking water are easily used by nitrifying bacteria to generate nitrite, and the high concentration of nitrite Salt tap water will cause great harm to human health after being drunk by the human body. At present, whether it is sewage discharge or reuse, the state strictly controls the nitrogen and phosphorus discharge standards in sewage, and the source water i...

AI Technical Summary

Problems solved by technology

The eutrophication of the water body leads to algae outbreaks and the lack of oxygen in the water body. Nitrogen and phosphorus are the main factors that cause algal blooms. Moreover, nitrogen and phosphorus in drinking water are easily used by nitrifying bacteria to generate nitrite, and the high concentration of nitrite Salt tap water will cause great harm to human health after being drunk by the human body

At present, whether it is sewage discharge or reuse, the state strictly controls the nitrogen and phosphorus discharge standards in sewage, and the source water is more stringent. However, it is difficult to efficiently remove low-concentration nitrogen and phosphorus (concentration < 8mg / L)

[0003] Chinese patent CN101003390 proposes a kind of industrial pickling waste liquid and iron oxide scale as main raw materials, using high-shear equipment to prepare stable polysilicate ferric chloride inorganic polymer flocculant, the process of the invention is simple, the reaction conditions are mild, Less investment, full use of industrial waste, good environmental and economic benefits, the application effect is better than polyferric chloride, ferric chloride and other iron-containing flocculants in the purification of tap water, but the basicity of the product is small, The applicable temperature range is narrow, and the effect on reducing the content of nitrogen and phosphorus is not obvious

[0004] At present, some achievements have been made in wastewater purification treatment at home and abroad, and the removal of turbidity, chroma, COD and other indicators has obvious effects, but there are still certain limitations in reducing the low-concentration nitrogen and phosphorus content in water bodies.