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 cadmium removal efficiency that needs to be further improved, low cadmium selectivity, etc. Achieve the effect of solving material recycling, high saturation magnetization, and solving separation difficulties

Active Publication Date: 2019-03-22
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. The preparation method comprises the following steps: selecting sodium bentonite,ferric chloride, cobalt chloride, sodium acetate and ethylene glycol as raw materials, mixing uniformly, and then performing hydrothermal reaction to prepare nano-magnetic bentonite A; then mixing the nano-magnetic bentonite A with manganese chloride and a sodium permanganate solution, in which potassium permanganate is dissolved, so as to react to obtain manganese dioxide-loaded nano-magnetic bentonite B; then reacting the manganese dioxide-loaded nano-magnetic bentonite B with an organic solvent, a silane coupling agent and the like to obtain novel amino-functionalized manganese dioxide-loaded nano-magnetic bentonite. According to the novel nano-magnetic bentonite disclosed by the invention, an iron and cobalt-containing magnetic nanomaterial is loaded on the bentonite, active manganesedioxide and amino functional groups are introduced, the selectivity and removal effect of cadmium ions can be effectively strengthened when the paramagnetic property of a material is simultaneously maintained, and the adsorption efficiency of Cd<2+> is as high as 99% or above.

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 Applications(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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