Composite microcapsule adsorbent for removing Cs < + > in water and preparation method thereof

A technology of composite microcapsules and adsorbents, which is applied in the intersecting field of environment and biological materials, can solve the problems of ineffective removal of organic pollutants in water, achieve the effects of green production process, reduce energy consumption, and facilitate separation

Pending Publication Date: 2020-09-22
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that existing methods cannot effectively remove organic pollutants in water, the present invention provides a method for removing Cs in water + Composite microcapsule adsorbent and preparation method thereof

Method used

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  • Composite microcapsule adsorbent for removing Cs &lt; + &gt; in water and preparation method thereof
  • Composite microcapsule adsorbent for removing Cs &lt; + &gt; in water and preparation method thereof
  • Composite microcapsule adsorbent for removing Cs &lt; + &gt; in water and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Dissolve 100 mg of polylactic acid and 10 mg of camphor in 5 mL of dichloromethane, then add 0.5 mL of ammonium carbonate solution with a mass fraction of 4%, and then use the 1 / 2" probe of the ultrasonic breaker to treat for 0.5 min ; Take the above solution and gradually add it to 10 mL of polyvinyl alcohol solution with a mass fraction of 5%, and then use a high-speed dispersing homogenizer to process it at 9000 rpm for 5 min; then add 10 mL of isopropyl alcohol with a mass fraction of 2% to the solution Alcohol solution, stirred at 20°C for 120 min, washed twice with deionized water (5000 g, 5 min) repeatedly; finally, 10 mL of polyethylimide solution with a concentration of 1 mg / mL was added to the solution, and the Stir at 20 °C for 120 min, and wash twice with deionized water (5000 g, 5 min) repeatedly to obtain modified polylactic acid microcapsules.

[0033] (2) Prepare FeCl containing 0.5 mmol citric acid 3 solution (20mL, 1.0 mM), add K containing 0.5 mm...

Embodiment 2

[0036](1) Dissolve 300 mg of polylactic acid and 30 mg of camphor in 8 mL of dichloromethane, then add 0.8 mL of ammonium carbonate solution with a mass fraction of 4%, and then use the 1 / 2" probe of the ultrasonic breaker to treat for 0.5 min ; Take the above solution and gradually add it to 30 mL of polyvinyl alcohol solution with a mass fraction of 5%, and then use a high-speed dispersing homogenizer to process it at 9000 rpm for 5 min; then add 30 mL of isopropyl alcohol with a mass fraction of 2% to the solution Alcohol solution, stirred at 25°C for 120 min, washed with deionized water repeatedly (5000 g, 5 min) for 2 to 3 times; finally, 10 to 50 mL of polyacetylene at a concentration of 1 mg / mL was added to the solution The amine solution was stirred at 25 °C for 120 min, and washed with deionized water repeatedly (5000 g, 5 min) for 2 to 3 times to obtain modified polylactic acid microcapsules.

[0037] (2) Prepare FeCl containing 0.5 mmol citric acid 3 solution (30 m...

Embodiment 3

[0040] (1) Dissolve 500mg of polylactic acid and 150mg of camphor in 10mL of dichloromethane, then add 1.0mL of ammonium carbonate solution with a mass fraction of 4%, and then use the 1 / 2" probe of the ultrasonic breaker to treat for 0.5 min; take the above The solution was gradually added to 50 mL of polyvinyl alcohol solution with a mass fraction of 5%, and then treated with a high-speed dispersing homogenizer at 9000 rpm for 5 min; then 50 mL of isopropanol solution with a mass fraction of 2% was added to the solution, Stir at 30 °C for 120 min, wash with deionized water repeatedly (5000 g, 5 min) for 3 times; finally add 50 mL of polyethylimide solution with a concentration of 1 mg / mL to the solution, Stir for 120 min, and wash with deionized water repeatedly (5000 g, 5 min) for 3 times to obtain modified polylactic acid microcapsules.

[0041] (2) Prepare FeCl containing 0.5 mmol citric acid 3 solution (50 mL, 1.0 mM), add K containing 0.5 mmol citric 4 [Fe(CN) 6 ] so...

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Abstract

The invention provides a composite microcapsule adsorbent for removing Cs < + > in water and a preparation method thereof. Radioactive elements in the water are effectively removed, and the compositemicrocapsule adsorbent is applied to a treatment process of radioactive sewage. The specific method comprises the following steps: modifying microcapsules with polylactic acid, and reacting with nanoPrussian blue obtained by reaction of ferric chloride and potassium ferrocyanide to prepare the Prussian blue-polylactic acid composite microcapsule adsorbent. After adsorbing Cs < + > in water, the microcapsule adsorbent rises and floats on the surface of a water body for separation so that the purpose of removing Cs < + > in water is achieved. Meanwhile, the selected carrier polylactic acid hasthe comprehensive properties of no toxicity, no harm, degradability, environmental friendliness, no secondary pollution and the like, and the problems that Prussian blue is easy to gather and difficult to separate are also solved. The method is simple in process, and particularly can adsorb low-concentration Cs < + > so that the method can be widely used for treating sewage containing Cs < + >, improving the living environment of human beings and improving the living quality.

Description

technical field [0001] The invention belongs to the interdisciplinary field of environment and biological materials, and relates to a method for removing Cs in water + Composite microcapsule adsorbent and preparation method thereof. Background technique [0002] The operation of nuclear power plants may cause large-scale nuclear power plant disasters. In 2011, the Fukushima nuclear accident in Japan was still happening, and a large number of radioactive nuclear species entered the atmosphere and ocean through the Fukushima nuclear accident. The spread of radioactive cesium caused by nuclear accidents has led to large-scale environmental pollution. Compared with other radioactive pollutants, cesium is characterized by being easily soluble in water, high in gamma ray radiation, and has a half-life of 30 years. Therefore, during nuclear accidents, cesium can easily pollute water and soil due to the spread of radioactive fallout in the form of aerosols. Because cesium has a s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30G21F9/12
CPCB01J20/265B01J20/0229B01J20/28021G21F9/12
Inventor 冯珊珊郦嘉颖刘文静龙尚仙
Owner CHANGZHOU UNIV
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