Preparation method and application of montmorillonoid and carbon composite material

A technology of carbon composite materials and montmorillonite, which is applied in the intersecting field of environment and materials, can solve the problems of expensive adsorbent, difficulty in separation, and restricted utilization, and achieve good removal effect, simple preparation, and cheap raw materials

Inactive Publication Date: 2016-09-07
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high cost of adsorbent is the main reason restricting its application.
In recent years, montmorillonite has been used as a new type of adsorbent in water treatment, but its difficult separation in water restricts its application.

Method used

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  • Preparation method and application of montmorillonoid and carbon composite material
  • Preparation method and application of montmorillonoid and carbon composite material
  • Preparation method and application of montmorillonoid and carbon composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1 (montmorillonite and carbon composite material)

[0023] a. Purification and sodiumization of montmorillonite: Take 20g of montmorillonite and add it to 400mL of deionized water and stir evenly, then let it stand still. After layering, pour out the residue at the bottom, and continue to use the supernatant. To obtain higher-purity montmorillonite, add 100 mL of deionized water to montmorillonite and slowly stir to form a uniform mixed solution, then add 1 g of sodium chloride solid, and continue stirring to obtain a uniformly mixed slurry, then centrifuge the slurry, add deionized Ionized water, washed several times until the chloride ions are washed away, and finally dried to obtain sodium-based montmorillonite;

[0024] b. Preparation of montmorillonite and carbon composite materials: Weigh the sodium-based montmorillonite in step a, add deionized water, and ultrasonically treat for half an hour to form a uniform mixture, and mix in a mass ratio of 1:0.5-...

Embodiment 10

[0029] Add 0.4g / L of montmorillonite and carbon composite adsorbent prepared in Example 5 into lead-containing 300mg / L sewage, then adjust to pH=6 and temperature 303K, shake the sewage at 150rpm for 27 hours, After separation, the purpose of adsorption and removal of heavy metal lead ions can be achieved. The treated water sample was measured, and the adsorption capacity of the adsorbent was 550.00 mg / g, and the removal rate of lead ions was 73.30%.

Embodiment 11

[0030] Example 11 (Carboxylated Montmorillonite and Carbon Composite)

[0031]a. Purification and sodiumization of montmorillonite: Take 10g of montmorillonite and add it into 200mL deionized water and stir evenly, then let it stand still. , to obtain higher purity montmorillonite, add 100mL deionized water to montmorillonite and slowly stir to form a uniform mixed solution, then add 1.0g of sodium chloride solid, continue stirring to obtain a uniformly mixed slurry, then centrifuge the slurry, Add deionized water, wash repeatedly until the chloride ions are washed away, and finally dry to obtain sodium-based montmorillonite;

[0032] b. Preparation of montmorillonite and carbon composite material: Weigh 2 g of sodium-based montmorillonite in step a and add 20 mL of deionized water, ultrasonically treat for half an hour to form a uniform mixed solution, and add it to the mixed solution at a mass ratio of 1:3.7 Add glucose monohydrate and stir vigorously for 50 minutes to obta...

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Abstract

The invention relates to a preparation method and application of a montmorillonite and carbon composite material. According to the method, low-cost and highly-available montmorillonite and dextrose monohydrate are taken as raw materials, and the surface of a composite material is modified by the steps of purification and sodium modification of the montmorillonite, hydrothermal treatment of the montmorillonite and the dextrose monohydrate, functionalization of the composite material and the like, so as to prepare carbon modified montmorillonite for water treatment. The montmorillonite and carbon composite material obtained by the method has high stability and adsorption performance, and the maximum adsorption capacity for lead ions in wastewater is 932.49mg / g; according to the method, the adsorption performance of the montmorillonite for heavy metals can be effectively improved, separation effects are improved, and recovery can be realized; a preparation condition is mild and simple, and the montmorillonite and carbon composite material is an efficient and low-cost heavy metal ion adsorbent.

Description

technical field [0001] The invention belongs to the intersection field of environment and materials, and specifically relates to the preparation and application of a composite material of montmorillonite and carbon. Background technique [0002] Over the past 10 years, with the continuous acceleration of China's industrialization, more and more industries are involved in heavy metal emissions, including mining, metal smelting, chemicals, printing and dyeing, leather, pesticides, feed, etc., plus illegal mining by some polluting enterprises , Excessive discharge of pollutants and other issues have caused heavy metal pollution incidents to occur frequently. The rapid development of industry has led to a large amount of heavy metals entering the environment, and these heavy metal pollutants have caused very serious harm to the environment and human health. Heavy metal wastewater mainly comes from mine pit drainage, waste rock field leaching water, ore dressing plant tailings d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F1/62
CPCB01J20/20B01J20/12C02F1/288
Inventor 贾汉忠祝可成王传义
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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