Mg-Fe bimetal hydroxide adsorbent and preparation method and application thereof

A hydroxide and adsorbent technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, other chemical processes, etc., can solve the problems of slow adsorption rate, uranium adsorption, poor adsorption effect, etc., and achieve the adsorption rate Fast, large adsorption capacity, effective adsorption effect

Inactive Publication Date: 2019-03-29
EAST CHINA UNIV OF TECH
View PDF8 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing adsorbents used for the treatment of uranium-containing wastewater have the p

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Mg-Fe bimetal hydroxide adsorbent and preparation method and application thereof
  • Mg-Fe bimetal hydroxide adsorbent and preparation method and application thereof
  • Mg-Fe bimetal hydroxide adsorbent and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0030] The embodiment of the present invention also provides a method for preparing the Mg-Fe double metal hydroxide adsorbent, which includes: performing a hydrothermal reaction between the iron-magnesium mixture formed by mixing the iron salt and the magnesium salt and the hydroxide solution, and Centrifugal separation. Magnesium ions and iron ions form Mg-Fe double-layer hydroxide under alkaline hydrothermal conditions, spreading magnesium hydroxide on the surface of iron hydroxide, and fully exposing the physical defect sites and chemically active sites of magnesium hydroxide. To promote the adsorption of uranyl ions in wastewater.

[0031] Specifically, the iron salt is selected from any one of iron chloride, iron nitrate and iron sulfate, preferably iron chloride, more preferably iron chloride hexahydrate; similarly, the magnesium salt is selected from magnesium chloride, magnesium nitrate and magnesium sulfate Any one of them is preferably magnesium chloride, and more pre...

Example Embodiment

[0040] Example 1

[0041] This embodiment provides a method for preparing a Mg-Fe double metal hydroxide adsorbent, which includes the following steps:

[0042] Ferric nitrate and magnesium nitrate are dissolved in deionized water to obtain an iron-magnesium mixture, wherein the molar ratio of Mg / Fe is 3:1, and the total concentration of magnesium ions and iron ions in the iron-magnesium mixture is 0.07 mol / L. Pour the iron and magnesium mixture into the hydrothermal reaction lining, and add 0.5 mol / L NaOH solution (the total amount is excessive relative to the molar amount of iron and magnesium ions) to make the pH of the system 10. Put the inner lining in an autoclave for 100 minutes at 160°C and 5.5Mpa. After the reaction is over, take it out, centrifuge and wash until the supernatant is neutral, and the obtained solid is freeze-dried at -40°C for 10 hours and dried for use.

[0043] This embodiment also provides a method for treating uranium-containing wastewater, using the ads...

Example Embodiment

[0044] Example 2

[0045] This embodiment provides a method for preparing a Mg-Fe double metal hydroxide adsorbent, which includes the following steps:

[0046] Dissolve ferric chloride hexahydrate and magnesium chloride hexahydrate in deionized water to obtain an iron-magnesium mixture, wherein the molar ratio of Mg / Fe is 5:1, and the total concentration of magnesium ions and iron ions in the iron-magnesium mixture is 0.012mol / L . Pour the iron and magnesium mixture into the hydrothermal reaction lining, and add 1.5 mol / L NaOH solution (the total amount is excessive relative to the molar amount of iron and magnesium ions) to make the pH of the system 13. Put the inner lining in an autoclave and react for 150 minutes at 200°C and 6.5Mpa. After the reaction is over, take it out, centrifuge and wash until the supernatant is neutral, and freeze-dry the obtained solid at -60°C for 14 hours and dry it for later use.

[0047] This embodiment also provides a treatment method for uranium-...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Saturated adsorption capacityaaaaaaaaaa
Login to view more

Abstract

The invention discloses an Mg-Fe bimetal hydroxide adsorbent and a preparation method and application thereof, and relates to the technical field of adsorbents. The Mg-Fe bimetal hydroxide adsorbent is of a sheet structure and is formed by loading magnesium hydroxide on a ferric hydroxide surface layer; preferably, the adsorbent is prepared by hydrothermal reaction of Fe-Mg mixed liquid formed bymixing a ferric salt and a magnesium salt with a hydroxide solution; and more preferably, the mol ratio of the magnesium salt to the ferric salt is (3-5):1. According to the preparation method of theMg-Fe bimetal hydroxide adsorbent, by means of hydrothermal reaction of the Fe-Mg mixed liquid formed by mixing the ferric salt and the magnesium salt with the hydroxide solution, the magnesium hydroxide is spread on the ferric hydroxide surface layer, and by optimizing the ratio of the magnesium hydroxide and the ferric hydroxide, the selection of the raw materials and the preparation conditions,the finally obtained adsorbent can more effectively adsorb uranium in wastewater. The prepared adsorbent has a large adsorption capacity for uranium, has a high adsorption rate, and can be applied totreatment of uranium-containing wastewater.

Description

technical field [0001] The invention relates to the technical field of adsorbents, and in particular to a Mg-Fe double metal hydroxide adsorbent, a preparation method and application thereof. Background technique [0002] Under the current international background of energy shortage and environmental constraints, nuclear power is favored by all countries because of its clean, efficient, low-carbon, and economical characteristics. As the main fuel for nuclear power generation, natural uranium is the foundation of nuclear power development. Its supply is related to the stability of the operation of the nuclear power industry. It is estimated that by 2020, my country's annual demand for natural uranium will reach 16,400 tons. In order to meet the development of my country's nuclear power industry, it is necessary to intensify the exploration, mining and dressing and smelting of uranium resources. However, the mining and dressing process of uranium mines will produce a large am...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B01J20/06C02F1/28B01J20/30
CPCB01J20/041B01J20/06C02F1/281C02F2101/006
Inventor 王学刚李鹏聂世勇刘志朋王立章
Owner EAST CHINA UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products