A kind of preparation method and application of quinone-based starch functional material

A functional material and starch technology, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of accelerating the microbial degradation process of perchlorate and the degradation rate of perchlorate wastewater Slow, high dosing cost and other problems, to achieve good catalytic effect, reduce secondary pollution, and good biocompatibility

Inactive Publication Date: 2015-09-23
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a functional material that uses natural, highly biocompatible starch as a carrier to immobilize quinone compounds, and apply it to biological treatment of wastewater. Branch method is fixed on the starch carrier and applied to the technical scheme of accelerating the microbial degradation process of perchlorate. On the one hand, it solves the slow degradation rate of perchlorate wastewater by microorganisms, the high cost of continuous addition of water-soluble redox mediators and the It is easy to cause secondary pollution, and on the other hand, it expands the application field of quinone-based modified starch

Method used

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  • A kind of preparation method and application of quinone-based starch functional material
  • A kind of preparation method and application of quinone-based starch functional material
  • A kind of preparation method and application of quinone-based starch functional material

Examples

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Embodiment 1

[0030] Example 1 Preparation and characterization of p-benzoquinone starch:

[0031] One, prepare p-benzoquinone starch with tapioca starch

[0032] (1) Preparation of aminated starch:

[0033] A. Starch crosslinking: Weigh 16.2g tapioca starch and dissolve it in 30ml dilute alkali solution (mixed solution of 3g sodium chloride and 0.4g sodium hydroxide), raise the temperature to 40°C and stir, then add 0.5ml epichlorohydrin, drop The process is completed within 3-5min, and the reaction takes 3h. After stopping the reaction, let stand for 1 hour, repeat water washing and suction filtration for 2-5 times, finally dehydrate with absolute ethanol, and dry at 60°C for 2-4 hours to obtain cross-linked starch;

[0034]B. Starch etherification: Take 13.3g of the cross-linked starch synthesized in A and 30ml of distilled water to make a paste, add 0.17g of perchloric acid as an initiator under stirring at room temperature, raise the temperature to 60°C, and react for 0.5h. Then ...

Embodiment 2

[0043] Example 2 Preparation of anthraquinone starch and naphthoquinone starch

[0044] The preparation method of aminated starch is the same as in Example 1, and the subsequent steps are as follows:

[0045] (1) Preparation of naphthoquinone starch

[0046] 0.8g catalyst NaNO 3 , 1.5g of naphthoquinone and 5g of aminated starch were dissolved in 50ml of N,N-dimethylformamide, the temperature was raised to 60°C, and the reaction was carried out for 1h, and the reaction product was washed three times with N-dimethylformamide. The crude product of naphthoquinone starch was extracted, then Soxhlet extracted with absolute ethanol, and dried at 60°C for 3 hours to obtain the pure product of naphthoquinone starch.

[0047] (2) Preparation of anthraquinone starch

[0048] 0.8g catalyst NaNO 3 , 2.0 g of anthraquinone and 5 g of aminated starch were dissolved in 50 ml of N,N-dimethylformamide, the temperature was raised to 40° C., and reacted for 3 h. The reaction product was w...

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Abstract

The invention discloses a preparation method and an application of a quinonyl starch functional material, which belongs to the field of environment engineering, chemical engineering and material engineering. According to the technical scheme, starch which is rich in resource, simple in chain structure, free of biologic toxicity and harm, stable in property and easy to modify is adopted as a carrier material for fixing a quinones compound by using a chemical grafting method, and the prepared quinonyl starch is applied to an accelerated perchlorate micro-biological degradation process. The preparation method and the application have the beneficial effects that firstly, as the quinones compound is fixed to a starch macromolecular framework by using a chemical grafting method, the fixation process is simple, the stability is good, the quinonyl is not easy to loss, and the secondary pollution is effectively reduced; secondly, the raw materials are cheap, good in biocompatibility, low in production cost and easy in practical application; thirdly, a good catalysis effect is achieved when the quinonyl starch is applied to acceleration perchlorate micro-biological degradation; fourthly, the application field of a quinonyl modified starch functional material is widened.

Description

technical field [0001] The invention belongs to the fields of environmental engineering, chemical engineering and material engineering, and relates to a method for chemically modifying starch to fix quinone compounds and the application of quinone-based starch functional materials, in particular to its use in microbial degradation of perchlorate. Background technique [0002] In recent years, with industrial progress and social development, the use of perchlorate has become more and more extensive, and can be used in the production of rocket propellants, pyrotechnics manufacturing, munitions industry, blasting operations and other fields. Because of its high solubility and high diffusivity, once it enters the environment, most of it enters surface water and groundwater such as rivers and lakes, and spreads rapidly with the flow of water bodies, and the soil has little effect on its adsorption. The harm of perchlorate to human health is mainly reflected in the interference of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L3/00C02F3/34
Inventor 郭建博张华雨牛春梅廉静郭延凯许晴侯正浩李绍英
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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