Fe-Mn loaded nanofiber membrane cadmium elimination material and preparation method thereof

A nanofiber membrane, carrier material technology, applied in chemical instruments and methods, other chemical processes, alkali metal oxides/hydroxides, etc., to achieve the effects of environmental friendliness, fast adsorption kinetics, and high specific surface area

Inactive Publication Date: 2014-03-26
INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the deficiencies of the existing cadmium adsorbents, the present invention provides a nanofiber membrane cadmium-removing material loaded with iron-manganese, which has the advantages of fast adsorption kinetics, high adsorption capacity and easy separation, and its preparation method

Method used

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  • Fe-Mn loaded nanofiber membrane cadmium elimination material and preparation method thereof
  • Fe-Mn loaded nanofiber membrane cadmium elimination material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1) 12.6 g ferrous sulfate (FeSO 4 ·7H 2 O) and 1.2 g potassium permanganate (KMnO 4 ) were each dissolved in 100 mL of deionized water, and under magnetic stirring conditions, the ferrous sulfate solution was slowly added to the potassium permanganate solution, and the stirring was continued for 2.0 hours. The entire experimental process was carried out at room temperature;

[0020] 2) Completely soak the polyacrylonitrile nanofiber membrane in the solution in step 1) for 5.0 hours;

[0021] 3) Heat the solution in step 2) to boiling under the condition of slow magnetic stirring, then slowly add 26 mL 5 M NaOH to the solution, stop heating and stirring after 30 minutes of reaction, and cool to room temperature;

[0022] 4) Take out the polyacrylonitrile nanofiber membrane loaded with iron-manganese nano-oxide in step 3), wash it several times with deionized water until there is no material falling off the surface of the product, and then dry it in an oven at 80 °C for...

Embodiment 2

[0025] 1) 8.1 g ferric chloride (FeCl 3 ) and 1.2 g potassium permanganate (KMnO 4 ) were each dissolved in 100 mL of deionized water, and under magnetic stirring conditions, the ferrous sulfate solution was slowly added to the potassium permanganate solution, and the stirring was continued for 2.0 hours. The entire experimental process was carried out at room temperature;

[0026] 2) Completely soak the polystyrene nanofiber membrane in the solution in step 1) for 5.0 hours;

[0027] 3) Heat the solution in step 2) to boiling under the condition of slow magnetic stirring, then slowly add 26 mL 5 M NaOH to the solution, stop heating and stirring after 30 minutes of reaction, and cool to room temperature;

[0028] 4) Take out the polystyrene nanofiber membrane loaded with iron-manganese nano-oxide in step 3), wash it several times with deionized water until no material falls off the surface of the product, and then dry it in an oven at 80 °C for later use.

[0029] In order t...

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Abstract

The invention relates to a Fe-Mn loaded nanofiber membrane cadmium elimination material and a preparation method thereof, and belongs to the technical field of environment materials. The preparation method comprises the following steps: firstly, adopting electrospinning technique to prepare a polymer nanofiber membrane with large specific surface area, high porosity and strong toughness; secondly, adopting the polymer nanofiber membrane as a carrier material, and soaking the carrier material in a Fe-Mn salt solution; lastly, heating and adjusting pH to prepare a Fe-Mn oxidate loaded polymer nanofiber membrane with high specific surface area and simplicity in separation, wherein the nanofiber membrane can selectively adsorb and remove heavy metal cadmium Cd (II) in water, and has the advantages of fast adsorption kinetics, high adsorption capacity and simplicity in separation. The novel cadmium elimination material is simple in preparation method and low in cost, and has relatively good application prospects in purification treatment of cadmium contained water and wastewater.

Description

technical field [0001] The invention relates to an iron-manganese-loaded nanofiber membrane cadmium removal material and a preparation method thereof, belonging to the technical field of environmental materials. Background technique [0002] Cadmium is considered to be a very dangerous heavy metal element, which mainly comes from the smelting of zinc, copper, and lead ores, as well as industrial production such as electroplating, batteries, alloys, paints, and plastics. With the continuous development of mining, smelting and refining, and electroplating industries, a large amount of cadmium-containing wastewater without effective treatment is discharged into rivers, causing cadmium pollution. For example, the itai-itai incident that occurred in Japan in the middle of the 20th century was caused by the pollution of cadmium in the Jinzugawa River in Fuji County, which led to cadmium poisoning of local residents and hundreds of deaths; in 2012, it occurred in the Longjiang Rive...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F1/62
Inventor 郑煜铭钟鹭斌尹君程晓夏刘青
Owner INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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