High-efficiency uranium adsorbent prepared from bentonite-grafted graphene oxide and preparation method thereof

A technology of bentonite and graphene, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problems of low adsorption rate and poor adsorption effect, achieve fast adsorption rate, simple preparation method, The effect of high saturated adsorption capacity

Active Publication Date: 2017-09-15
NANHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the above problems in the prior art, the present invention provides a high-efficiency uranium adsorbent grafted with bentonite and graphene oxide and a preparation method thereof, which can effectively solve the problem of low adsorption rate when bentonite and graphene oxide are used alone in the prior art. The problem of poor adsorption effect

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  • High-efficiency uranium adsorbent prepared from bentonite-grafted graphene oxide and preparation method thereof
  • High-efficiency uranium adsorbent prepared from bentonite-grafted graphene oxide and preparation method thereof
  • High-efficiency uranium adsorbent prepared from bentonite-grafted graphene oxide and preparation method thereof

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Embodiment 1

[0037] A kind of high-efficiency uranium adsorbent of bentonite grafted graphene oxide, its preparation method comprises the following steps:

[0038] (1) ultrasonically disperse 0.4g graphene oxide in 200mL deionized water to obtain a graphene oxide suspension;

[0039] (2) Add 14g of bentonite to 100mL of deionized water and stir to obtain bentonite suspension;

[0040] (3) Mix the graphene oxide suspension and the bentonite suspension, stir evenly, then add 17mL of sodium hydroxide solution with a mass concentration of 40%, stir and mix, then drop into 17mL epichlorohydrin, mix well, and heat to 65°C, finally add 17mL of 1% ammonium persulfate solution and 4mL of 1% sodium bisulfite aqueous solution successively, after constant temperature stirring and polymerization for 3h, stop stirring, filter with suction, wash with acetone and distilled water until neutral, and cool naturally to At room temperature, vacuum-dry at 80°C for 6.5 hours, and grind into powder; wherein, the...

Embodiment 2

[0042] A kind of high-efficiency uranium adsorbent of bentonite grafted graphene oxide, its preparation method comprises the following steps:

[0043] (1) ultrasonically disperse 0.8g graphene oxide in 200mL deionized water to obtain a graphene oxide suspension;

[0044] (2) Add 16g of bentonite to 100mL of deionized water and stir to obtain bentonite suspension;

[0045] (3) Mix the graphene oxide suspension and the bentonite suspension, stir evenly, then add 22mL of sodium hydroxide solution with a mass concentration of 40%, stir and mix, then drop into 22mL epichlorohydrin, mix well, and heat to 75°C, finally add 22mL of 1% ammonium persulfate solution and 6mL of 1% sodium bisulfite aqueous solution successively, after constant temperature stirring and polymerization for 4h, stop stirring, filter with suction, wash with acetone and distilled water until neutral, and naturally cool to room temperature , vacuum-dried at 90°C for 5.5 hours, and ground into powder; wherein, th...

Embodiment 3

[0047] A kind of high-efficiency uranium adsorbent of bentonite grafted graphene oxide, its preparation method comprises the following steps:

[0048] (1) ultrasonically disperse 0.5g graphene oxide in 200mL deionized water to obtain a graphene oxide suspension;

[0049] (2) Add 15g of bentonite to 100mL of deionized water and stir to obtain bentonite suspension;

[0050] (3) Mix the graphene oxide suspension and the bentonite suspension, stir evenly, then add 20mL of sodium hydroxide solution with a mass concentration of 40%, stir and mix, then drop into 20mL epichlorohydrin, mix well, and heat to 70°C, finally add 19mL of 1% ammonium persulfate solution and 4.4mL of 1% sodium bisulfite aqueous solution in sequence, after constant temperature stirring and polymerization for 3 hours, stop stirring, filter with suction, wash with acetone and distilled water until neutral, and cool naturally to room temperature, vacuum-dried at 80°C for 6 hours, and ground into powder; wherein, t...

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Abstract

The invention provides a high-efficiency uranium adsorbent prepared from bentonite-grafted graphene oxide. A preparation method for the high-efficiency uranium adsorbent comprises the following steps: (1) preparation of a suspension of graphene oxide; (2) preparation of a suspension of bentonite; and (3) chemical assembling of bentonite and graphene oxide under the action of NaOH with chloropropylene oxide as a cross-linking agent and ammonium sulfate and sodium bisulfite as initiator. The preparation method is simple in process and low in cost; and the prepared adsorbent has high saturated uranium adsorption quantity, which is as high as 234.19 mg/g, and fast adsorption rate, wherein adsorption equilibrium can be reached within 10 min.

Description

technical field [0001] The invention belongs to the technical field of uranium adsorbents, and in particular relates to a high-efficiency uranium adsorbent of bentonite grafted with graphene oxide and a preparation method thereof. Background technique [0002] A large amount of low-concentration uranium-containing radioactive wastewater produced by uranium mining and metallurgy poses a serious threat to the ecological environment. As a heavy metal, uranium is not only radioactive, but also has dynamic biological and chemical toxicity. Therefore, it is of great significance and application prospect to carry out the research on the treatment technology of uranium-containing wastewater and make the wastewater discharge up to the standard for the sustainable development of nuclear industry and environmental protection. [0003] Traditional removal methods for uranium in wastewater include chemical precipitation, ion exchange, adsorption, and membrane separation. The adsorption...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F101/20
CPCB01J20/12B01J20/20C02F1/281C02F2101/006C02F2101/20
Inventor 刘红娟谢水波廖菊严天润
Owner NANHUA UNIV
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