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Preparation method and application of amino-functionalized manganese dioxide-loaded nano-magnetic bentonite

An amino-functionalized, nano-magnetic technology, applied in chemical instruments and methods, alkali metal oxides/hydroxides, inorganic chemistry, etc., can solve the problems of poor cadmium selectivity and cadmium removal efficiency that need to be further improved. Achieve enhanced selectivity, improved solid-liquid separation efficiency, and high removal efficiency

Active Publication Date: 2021-11-02
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And it has strong adsorption capacity, which is beneficial to the adsorption of positively charged pollutants on its surface, but the selectivity to cadmium in wastewater is not strong during the treatment process, and the removal efficiency of cadmium in wastewater still needs to be further improved

Method used

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  • Preparation method and application of amino-functionalized manganese dioxide-loaded nano-magnetic bentonite
  • Preparation method and application of amino-functionalized manganese dioxide-loaded nano-magnetic bentonite
  • Preparation method and application of amino-functionalized manganese dioxide-loaded nano-magnetic bentonite

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Embodiment 1

[0037] A preparation method of a magnetic adsorbent, specifically comprising the following steps:

[0038] Dissolve 6.0g of ferric chloride, 3.0g of cobalt chloride, and 18.0g of sodium acetate in 150mL of ethylene glycol to obtain a mixed solution Ⅰ, mix 4.0g of sodium bentonite with 150mL of mixed solution Ⅰ, and age for 5 hours. The mixed solution II was obtained, and then the mixed solution II obtained above was packaged in a polytetrafluoroethylene reactor for hydrothermal reaction, heated at 200° C. for 12 hours, and cooled to room temperature after the reaction was completed. Wash the obtained solid with absolute ethanol and distilled water for 3 to 5 times, vacuum-dry, grind, and pass through a 200-mesh sieve to obtain nano-magnetic bentonite A. Take 6.0g of nano-magnetic bentonite A in a beaker, add 600mL of ultrapure water, and ultrasonically disperse for 15min. Add 2.0g of manganese chloride during the stirring process to obtain a suspension, then place the suspens...

Embodiment 2

[0045] A preparation method of novel nano-magnetic bentonite, specifically comprising the following steps:

[0046] Dissolve 9.0g of ferric chloride, 3.0g of cobalt chloride, and 12.0g of sodium acetate in 100mL of ethylene glycol to obtain a mixed solution Ⅰ, mix 5.0g of sodium bentonite with 100mL of mixed solution Ⅰ, and age for 3 hours. The mixed solution II was obtained, and then the above mixed solution II was packaged in a polytetrafluoroethylene reactor for hydrothermal reaction, heated at 200°C for 12 hours, and cooled to room temperature after the reaction was completed. Wash the obtained solid with absolute ethanol and distilled water for 3 to 5 times, vacuum-dry, grind, and pass through a 200-mesh sieve to obtain nano-magnetic bentonite A. Take 6.0g of nano-magnetic bentonite A in a beaker, add 600mL of ultrapure water, and ultrasonically disperse for 15min. Add 2.0g of manganese chloride during stirring to obtain a suspension, then place the suspension in a water...

Embodiment 3

[0050] A preparation method of novel nano-magnetic bentonite, specifically comprising the following steps:

[0051] Dissolve 4.0g of ferric chloride, 4.0g of cobalt chloride, and 16.0g of sodium acetate in 150mL of ethylene glycol to obtain a mixed solution Ⅰ, mix 3.0g of sodium bentonite with 150mL of mixed solution Ⅰ, and age to obtain Mixed solution II, and then the mixed solution II obtained above was packaged in a polytetrafluoroethylene reactor for hydrothermal reaction, heated at 200°C for 12 hours, and cooled to room temperature after the reaction was completed. Wash the obtained solid with absolute ethanol and distilled water for 3 to 5 times, vacuum dry, grind, and pass through a 200-mesh sieve to obtain nano-magnetic bentonite A. Take 6.0g of nano-magnetic bentonite A in a beaker, add 600mL of ultrapure water, and ultrasonically disperse for 15min. Add 2.0g of manganese chloride during the stirring process to obtain a suspension, then place the suspension in a wate...

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Abstract

The invention discloses a preparation method of amino-functionalized manganese dioxide-loaded nano-magnetic bentonite, which comprises the following steps: selecting sodium-based bentonite, ferric chloride, cobalt chloride, sodium acetate and ethylene glycol as raw materials, and mixing them uniformly Carrying out hydrothermal reaction to prepare nano-magnetic bentonite A; then mixing and reacting nano-magnetic bentonite A with manganese chloride and sodium hydroxide solution dissolved in potassium permanganate to obtain manganese dioxide-loaded nano-magnetic bentonite B; Manganese oxide-loaded nano-magnetic bentonite B is reacted with an organic solvent, a silane coupling agent, etc., to obtain a novel amino functionalized manganese dioxide-loaded nano-magnetic bentonite. The new nano-magnetic bentonite of the present invention loads iron-cobalt-containing magnetic nano-materials on the bentonite, and introduces active manganese dioxide and amino functional groups. While maintaining the paramagnetic properties of the material, it can effectively strengthen the selectivity and removal effect of cadmium ions. Cd 2+ The adsorption efficiency is as high as 99%.

Description

technical field [0001] The invention relates to the technical field of environmental functional materials, in particular to a method for preparing a novel nano-magnetic bentonite, and more specifically to a method for preparing an amino-functionalized manganese dioxide-loaded nano-magnetic bentonite and its application. Background technique [0002] Cadmium is a heavy metal element that poses a great threat to human health. Cadmium pollution has attracted widespread attention from all over the world. At present, the treatment technologies of cadmium-containing wastewater include chemical precipitation method, ion exchange method, reverse osmosis method, membrane filtration method and adsorption method, etc. Among them, the adsorption method has the characteristics of high efficiency, fast speed, strong adaptability and easy operation, and is widely used. in the treatment of heavy metal wastewater. Magnetic materials are artificial synthetic materials that exhibit good magne...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/12B01J20/28C02F1/28C02F101/20
CPCB01J20/06B01J20/12B01J20/28009C02F1/281C02F2101/20
Inventor 周广柱王月周润声王翠珍杨翠英曹译允化春雨金玉芹
Owner SHANDONG UNIV OF SCI & TECH
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