Preparation method of sodium alginate/inorganic mineral joint-loaded nanometer zero-valent iron

Abstract

The invention provides a method for preparing sodium alginate / inorganic mineral joint-supported nano-zero-valent iron, which is characterized in that it comprises: preparing inorganic mineral-supported nano-zero-valent iron; preparing seaweed with a mass concentration of 1% to 3% Sodium acid solution; under the protection of nitrogen, the inorganic mineral-loaded nano-zero-valent iron and sodium alginate solution are mixed to obtain a sodium alginate / inorganic mineral-loaded nano-zero-valent iron blend; the sodium alginate / inorganic mineral-loaded The nano-type zero-valent iron blend is added dropwise into the CaCl2 solution with a syringe for cross-linking reaction to obtain spherical sodium alginate / inorganic mineral joint-loaded nano-zero-valent iron; cleaning, reduction, and vacuum drying to obtain sodium alginate / inorganic Mineral joint-loaded nano-scale zero-valent iron finished product. The invention has better removal effect on heavy metals in water environment. Taking the removal of Cu(II) as an example, after 24 hours of reaction, the removal rate can reach more than 90%.

Description

technical field [0001] The invention relates to sewage treatment and soil heavy metal pollution remediation technology, in particular to a preparation method of sodium alginate / inorganic mineral combined loading nanometer zero-valent iron for removing heavy metals in water environment. Background technique [0002] In recent years, with the development of the economy, heavy metal pollution in the environment has become increasingly serious. Heavy metal pollution has the characteristics of persistence, high toxicity, and serious pollution. Once heavy metals enter the environment, they can only undergo mutual transformation between various forms and are difficult to be biodegraded. Therefore it is difficult to remove. Moreover, heavy metals pose great harm to human health, such as Cr, Cu, Cd, As, etc., which are not only toxic but also carcinogenic. For heavy metal pollution, traditional treatment methods include chemical precipitation, ion exchange, activated carbon adsorp...

AI Technical Summary

Problems solved by technology

[0004] The void structure of the inorganic material itself can effectively overcome the shortcomings of nZVI when used alone, and improve the ability to remove pollutants, but it is difficult to separate from water, and the recycling rate of the material is low

[0005] Organic materials can entrap nZVI in the internal structure when forming gels, thus avoiding the Fe 0 Oxidation, but the pore size and mechanical strength of the embedding beads need to be improved

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