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Polyacrylamide modified Fe-Mn-S/sodium alginate composite microsphere and preparation method thereof

A technology of polyacrylamide and sodium alginate, applied in chemical instruments and methods, alkali metal compounds, and other chemical processes, can solve the problems of easy agglomeration of iron, manganese and sulfur ternary materials, low adsorption of sodium alginate, and heavy metal adsorption Low-level problems, to achieve good industrial application prospects, uniform size, strong acid resistance

Inactive Publication Date: 2021-01-15
HUBEI FORBON TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the existing problems of iron, manganese and sulfur ternary materials, such as easy agglomeration and low adsorption capacity of sodium alginate, etc.
The invention provides a polyacrylamide-modified Fe-Mn-S / sodium alginate composite microsphere and a preparation method thereof. The invention effectively improves the sodium alginate microsphere by introducing iron, manganese and sulfur ternary porous materials into the sodium alginate microsphere. The specific surface area of ​​the ball solves the problem of low adsorption of heavy metals by a single sodium alginate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Preparation of iron-manganese-sulfur ternary porous material: first add 500g of water into the mixer, then add 360g of iron sulfide, 325g of manganese dioxide, and 290g of sulfur powder into the mixer in turn, and the iron sulfide and manganese dioxide are all The sulfur mesh is 50 mesh, the sulfur mesh is 400 mesh, stirred at a stirring rate of 100rpm for 15min, then added 15g of naphthalenesulfonic acid formaldehyde condensate, and the mixture was stirred at a stirring speed of 200rpm for 60min to completely disperse iron sulfide, manganese oxide, and sulfur powder In the water. To the obtained solution, gradually add 10 g of xanthan gum to adjust the viscosity to prepare the iron-manganese-sulfur ternary hydration solution; finally, freeze-dry the obtained iron-manganese-sulfur ternary hydration solution at minus 45°C for 4 hours, and pulverize it with a pulverizer to an average of 325 mesh, calcined at a temperature of 500°C for 1.5 hours, and then wet-milled to...

Embodiment 2

[0026] (1) Preparation of iron-manganese-sulfur ternary porous material: first add 500g of water into the mixer, then add 360g of iron sulfide, 325g of manganese dioxide, and 290g of sulfur powder into the mixer in turn, and the iron sulfide and manganese dioxide are all The sulfur mesh is 50 mesh, the sulfur mesh is 400 mesh, with a stirring speed of 50rpm for 20min, then add 15g of naphthalenesulfonic acid formaldehyde condensate, and the mixture is stirred for 40min at a stirring speed of 200rpm, so that iron sulfide, manganese dioxide, and sulfur powder are completely dispersed. In the water. To the obtained solution, gradually add 10 g of xanthan gum to adjust the viscosity to prepare the iron-manganese-sulfur ternary hydration solution; finally, freeze-dry the obtained iron-manganese-sulfur ternary hydration solution at minus 45°C for 4 hours, and pulverize it with a pulverizer to an average of 325 mesh, calcined at a temperature of 500°C for 1.5 hours, and then wet-mill...

Embodiment 3

[0030] (1) Preparation of iron-manganese-sulfur ternary porous material: first, 500g of water is added into the mixer, and then 360g of iron sulfide, 325g of manganese dioxide, and 290g of sulfur powder are added to the mixer in turn, and iron sulfide, disulfide Manganese oxide is 100 orders, sulfur order is 200 orders, stirs 10min with the stirring rate of 100rpm, then adds 15g naphthalenesulfonic acid formaldehyde condensate, the stirring rate of mixture 200rpm stirs 35min, so that iron sulfide, manganese dioxide, sulfur The powder is completely dispersed in water. To the obtained solution, gradually add 10 g of xanthan gum to adjust the viscosity to prepare a ternary hydration solution of iron, manganese and sulfur; finally, freeze-dry the obtained ternary hydration solution of iron, manganese and sulfur at minus 45°C for 4 hours, and pulverize it with a pulverizer to an average of 325 mesh, calcined at a temperature of 500°C for 1.5 hours, and then wet-milled to an average...

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Abstract

The invention relates to a polyacrylamide modified Fe-Mn-S / sodium alginate composite microsphere and a preparation method thereof. The composite microsphere is composed of 22.3-78.6% of an iron-manganese-sulfur ternary porous material, 16.3-68.7% of sodium alginate, 0.2-5% of a cross-linking agent and 0.2-8% of a dispersing agent. The iron-manganese-sulfur ternary porous material is introduced into the sodium alginate microspheres, so that the specific surface area of the sodium alginate microspheres is effectively increased, and the problem of low heavy metal adsorption capacity of single sodium alginate is solved. The polyacrylamide modified Fe-Mn-S / sodium alginate composite microsphere prepared by the method is simple in technological process and convenient to control. The polyacrylamide-modified FeMnS / sodium alginate composite microsphere is widely applied to heavy metal treatment, and particularly has an obvious adsorption capacity for heavy metal chromium ions in a phosphoric acid solution, and the adsorption capacity is as high as 450mg / g.

Description

technical field [0001] The invention relates to a polyacrylamide-modified Fe-Mn-S / sodium alginate composite microsphere, a preparation method thereof, and an application in heavy metals. Background technique [0002] At present, the adsorbent using sodium alginate as raw material is a research hotspot of biomass adsorption materials, and the common sodium alginate is used as raw material to prepare hydrogel. At the same time, both Fe-Mn and Fe-S binary nanomaterials have unique physical and chemical properties. Due to their easy agglomeration and uncontrollable morphology, they severely limit their effective role in the environment. The existing Fe-Mn and Fe-S binary nanomaterials are prone to agglomeration, resulting in low adsorption capacity for heavy metals. [0003] The prior art patent CN109225134A describes a method for preparing porous biochar composite materials supported by needle-like Fe-Mn-S ternary nanomaterials. The specific scheme is to prepare porous biochar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/28B01J20/26C02F1/28C02F101/10C02F101/20
CPCB01J20/28021B01J20/24B01J20/267B01J20/06B01J20/02C02F1/281C02F1/285C02F1/286C02F2101/20C02F2101/103
Inventor 王仁宗汪志操素芬
Owner HUBEI FORBON TECH
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