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Modified charcoal composite hydrogel as well as preparation method and application thereof

A technology of composite hydrogel and biochar, applied in chemical instruments and methods, alkali metal compounds, other chemical processes, etc., can solve the problem of unsatisfactory adsorption effect of cadmium ions

Pending Publication Date: 2021-09-10
HENAN AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem that the current biochar composite hydrogel has an unsatisfactory adsorption effect on cadmium ions, the present invention provides a modified biochar composite hydrogel, which can greatly improve the adsorption of cadmium ions effect, to a greater extent reduce the toxic effect of cadmium on tobacco seedlings, and promote the growth of tobacco seedlings

Method used

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  • Modified charcoal composite hydrogel as well as preparation method and application thereof
  • Modified charcoal composite hydrogel as well as preparation method and application thereof
  • Modified charcoal composite hydrogel as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment 1: The modified biochar composite hydrogel provided in this example, the composite hydrogel includes nitric acid modified biochar, 5% polyvinyl alcohol aqueous solution, neutralized acrylic acid aqueous solution, ammonium persulfate and N, N'-methylenebisacrylamide, wherein modified biochar: 5% polyvinyl alcohol aqueous solution: neutralized acrylic acid aqueous solution = 1:20:80, the quality of ammonium persulfate is polyvinyl alcohol aqueous solution and neutralized acrylic acid The mass sum of the aqueous solution is 0.06%, and the mass of N,N'-methylenebisacrylamide is 0.04% of the mass sum of the polyvinyl alcohol aqueous solution and the neutralized acrylic acid aqueous solution.

[0040] Preparation:

[0041] The first step is to put peanut shell biochar into 12mol L -1 Heat and stir in the nitric acid solution at 60°C. The peanut shell biochar used was provided by Henan Huinong Soil Conservation Research and Development Co., Ltd., reacted for 6 hour...

Embodiment 2

[0045]Embodiment 2: The modified biochar composite hydrogel provided in this example, the composite hydrogel includes nitric acid modified biochar, 5% polyvinyl alcohol aqueous solution, neutralized acrylic acid aqueous solution, ammonium persulfate and N, N'-methylenebisacrylamide, wherein modified biochar: polyvinyl alcohol aqueous solution: neutralized acrylic acid aqueous solution=0.5:20:80, the quality of ammonium persulfate is the polyvinyl alcohol aqueous solution and the neutralized acrylic acid aqueous solution quality and 0.06% of N,N'-methylenebisacrylamide is 0.04% of the sum of polyvinyl alcohol aqueous solution and neutralized acrylic acid aqueous solution.

[0046] Preparation:

[0047] The first step is to put peanut shell biochar into 12mol L -1 Heat and stir in the nitric acid solution at 60°C, react for 6 hours, and rinse with distilled water repeatedly until neutral to remove excess oxidants and water-soluble compounds. Subsequently, the sample was dried ...

Embodiment 3

[0051] Embodiment 3: The modified biochar composite hydrogel provided in this embodiment, the composite hydrogel includes nitric acid modified biochar, 5% polyvinyl alcohol aqueous solution, neutralized acrylic acid aqueous solution, ammonium persulfate and N, N'-methylenebisacrylamide, wherein modified biochar: polyvinyl alcohol aqueous solution: neutralized acrylic acid aqueous solution=1.5:20:80, the quality of ammonium persulfate is the polyvinyl alcohol aqueous solution and the neutralized acrylic acid aqueous solution quality and 0.06% of N,N'-methylenebisacrylamide is 0.04% of the sum of polyvinyl alcohol aqueous solution and neutralized acrylic acid aqueous solution.

[0052] Preparation:

[0053] The first step is to put peanut shell biochar into 12mol L -1 Heat and stir in the nitric acid solution at 60°C, react for 6 hours, and rinse with distilled water repeatedly until neutral to remove excess oxidants and water-soluble compounds. Subsequently, the sample was dr...

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Abstract

The invention belongs to the technical field of composite hydrogel materials, and particularly relates to modified charcoal composite hydrogel as well as a preparation method and application thereof. The composite hydrogel takes charcoal, polyvinyl alcohol and acrylic acid as initial raw materials, and is prepared by the steps of: modifying charcoal by nitric acid to obtain modified charcoal; heating and dissolving polyvinyl alcohol to obtain a polyvinyl alcohol aqueous solution; diluting acrylic acid and neutralizing the diluted acrylic acid by potassium hydroxide to obtain a neutralized acrylic acid aqueous solution; adding an initiator ammonium persulfate and a cross-linking agent N, N'-methylene bisacrylamide into the metered modified charcoal, polyvinyl alcohol aqueous solution and neutralized acrylic acid aqueous solution; and heating to carry out a cross-linking polymerization reaction. The composite hydrogel has high Cd adsorption capacity, can adsorb cadmium in soil in tobacco planting, relieves the toxic action on tobacco seedlings under Cd stress, improves the SPAD value of the tobacco seedlings, enhances oxidation resistance and stress resistance of the tobacco seedlings, and promotes growth and development of the tobacco seedlings.

Description

technical field [0001] The invention belongs to the technical field of composite hydrogel materials, and in particular relates to a modified biochar composite hydrogel, a preparation method and its application in tobacco planting. Background technique [0002] Cadmium is a non-essential element for the human body. It often exists in the form of compounds in nature. Under normal circumstances, the content is very low and will not affect human health. However, when the environment is polluted by cadmium, cadmium can accumulate in water and soil, enter the human body through the enrichment of the food chain, and accumulate in the liver, kidney, spleen, pancreas and other organs of the human body, which will cause chronic cadmium poisoning and damage the human body healthy. [0003] In order to minimize the accumulation of cadmium into the human body through the food chain, it is necessary to take measures to reduce the cadmium content in water or soil. As a composite material...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/075C08F220/06C08F222/38C08K9/02C08K3/04B01J20/26B01J20/28B01J20/30C08L33/02
CPCC08J3/075C08F220/06C08K9/02C08K3/04B01J20/20B01J20/261B01J20/28047C08J2333/02C08F222/385
Inventor 姬小明刘云飞魏跃伟叶协锋夏茂林
Owner HENAN AGRICULTURAL UNIVERSITY
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