Sea-urchin-shaped iron/manganese binary-nanometer cadmium (Cd) elimination material and preparation method thereof

A sea urchin-like nano-technology, applied in chemical instruments and methods, iron oxide/iron hydroxide, and other chemical processes, can solve the problems of high preparation cost, low adsorption capacity, and low selectivity, and achieve fast precipitation, High adsorption capacity and easy preparation

Active Publication Date: 2014-04-02
INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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  • Abstract
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AI Technical Summary

Problems solved by technology

Existing adsorbents have disadvantages such as low adsorption capacity, low selectivity, or high preparation cost. For example, carbon-coated magnetic nanoparticles prepared by Bystrzejewski M. et al. (2009, Carbon) have a maximum adsorption capacity of only 1.77 mg / g (throwing The dosage is 5.0 g / L, the initial concentration C i = 20 mg / L), the carbon nanotubes prepared by Wang T. et al. (2013, Journal of Hazardous Materials) need to be heated at 130 ℃ for 72 h, which consumes a lot of energy

Method used

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  • Sea-urchin-shaped iron/manganese binary-nanometer cadmium (Cd) elimination material and preparation method thereof
  • Sea-urchin-shaped iron/manganese binary-nanometer cadmium (Cd) elimination material and preparation method thereof
  • Sea-urchin-shaped iron/manganese binary-nanometer cadmium (Cd) elimination material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1) 12.6 g ferrous sulfate (FeSO 4 ·7H 2 O) and 1.2 g potassium permanganate (KMnO 4 ) were dissolved in 100 mL of deionized water, and under stirring conditions, the ferrous sulfate solution was slowly added to the potassium permanganate solution, and the stirring was continued for 2.0 hours. The whole experimental process was carried out at room temperature;

[0019] 2) Heat the solution in step 1) to boiling with stirring, then slowly add 26 mL of 5 M NaOH to the solution, stop heating and stirring after 30 minutes of reaction, and cool to room temperature;

[0020] 3) Pour off the supernatant of the solution in step 2), and wash it with deionized water. After precipitation, pour off the supernatant, cycle several times, and then dry it in a 60°C oven for later use;

[0021] 4) Dissolve and disperse a small amount of the product in step 3) in deionized water, take a small amount of the mixed solution and drop it on the silicon wafer, dry it in an oven for 48 hours, ...

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Abstract

The invention relates to a sea-urchin-shaped iron/manganese binary-nanometer cadmium (Cd) elimination material and a preparation method thereof, and belongs to the technical field of environmental materials. Under the conditions of heating and pH regulation, an iron solution and a manganese solution are mixed according to a certain proportion, so that sea-urchin-shaped iron/manganese binary-nanometer oxide with a high specific surface area is prepared. The sea-urchin-shaped iron/manganese binary-nanometer oxide can be used for selectively adsorbing and eliminating heavy metal Cd (II) in water, and has the advantages of high adsorption kinetics speed, high adsorption capacity and wide pH application range. The preparation method of the novel Cd elimination material is simple and low in cost, and has a relatively good application prospect in terms of purification treatment on Cd-containing water and waste water.

Description

technical field [0001] The invention relates to a sea urchin-shaped iron / manganese binary nanometer cadmium-removing material and a preparation method thereof, belonging to the technical field of environmental materials. Background technique [0002] Cadmium is easy to accumulate and damage the liver and kidneys, especially the kidneys. It can also cause osteoporosis and softening, which seriously threatens human health. With the advancement of science and technology and the development of industry, many industries (such as smelting, electroplating, pigments, batteries, mining, nuclear industry, etc.) produce a large amount of wastewater containing heavy metal cadmium. The discharge of cadmium-containing wastewater without proper treatment has resulted in frequent occurrence of cadmium pollution incidents. 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 Shentong River in Fuji County, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/06B01J20/30C02F1/28C02F1/62C01G49/02
Inventor 郑煜铭尹君钟鹭斌程晓夏
Owner INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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