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

A nano-zero-valent iron, inorganic mineral technology, applied in nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problems of low material recycling rate, the pore size of embedded beads and the mechanical strength to be improved, etc. The effect of effluent quality and reuse rate, improving reuse rate and high reactivity

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A nano-zero-valent iron, inorganic mineral technology, applied in nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problems of low material recycling rate, the pore size of embedded beads and the mechanical strength to be improved, etc. The effect of effluent quality and reuse rate, improving reuse rate and high reactivity

CN105921763BActive Publication Date: 2018-04-20上海泽耀环保科技有限公司

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Embodiment 1

[0040] A kind of preparation method of sodium alginate / inorganic mineral combined loading type nanometer zero valent iron, such as figure 1 As shown, the specific steps are:

[0041] Step 1: Under the protection of nitrogen, use the liquid phase reduction method to combine inorganic minerals and FeSO 4 ·7H 2 O mixed to prepare inorganic mineral-supported nanometer zero-valent iron, the specific steps are: under the protection of nitrogen, take 24.88g FeSO 4 ·7H 2 O was dissolved in 200ml of ethanol-water solution with a volume ratio of 4:1 and then added to a 500ml three-necked flask to obtain FeSO 4 solution. Add 20g of Na-montmorillonite (Mt) to the above FeSO 4 solution, stirred for 30min to make it fully mixed to obtain FeSO 4 -Mt mixture. 50mlNaBH 4 The solution is placed in a constant pressure funnel, where the BH 4 - and FeSO 4 - Fe in inorganic mineral mixture2+ The molar ratio was 3:1, FeSO was added dropwise 4 -Mt mixed solution, the drop rate is 2 drops / ...

Embodiment 2

[0049] Similar to Example 1, the difference is that the mass concentration of the sodium alginate solution prepared in step 2 is 1%, 1.5%, 3%, and in step 3, the sodium-based montmorillonite-loaded nanometer zero-valent iron The mass concentration is 2%, 4%, 6%. The corresponding sodium alginate / sodium-based montmorillonite joint-loaded nanometer zero-valent iron was prepared.

Embodiment 3

[0051] Similar to Example 1, the difference is that in Step 3, the mass concentration of Na-montmorillonite-supported nano-ZVI is 2% and 4%. The corresponding sodium alginate / sodium-based montmorillonite joint-loaded nanometer zero-valent iron was prepared.

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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...

Claims

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Application Information

Patent Timeline

20 Apr 2018

Publication

CN105921763B

IPC: B22F9/24; B22F1/02; C02F1/70; B82Y40/00; B82Y30/00

CPC: B82Y30/00; B82Y40/00; C02F1/705; B22F9/24; B22F1/054; B22F1/102

Inventors: 宋新山; 肖燕萍