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Application of diatomite-loaded magnetic nickel-iron layered double-metal hydroxide as cyanobacteria flocculant

A layered bimetallic and hydroxide technology, applied in the field of water treatment, can solve the problems of low efficiency and high price, and achieve the effects of low efficiency, increasing self-weight and improving flocculation effect.

Pending Publication Date: 2022-04-12
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, flocculants have the potential to be pollutants to both circulating water and algae biomass, so choosing natural flocculants due to their biodegradability may alleviate this problem, but they are expensive and relatively inefficient

Method used

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  • Application of diatomite-loaded magnetic nickel-iron layered double-metal hydroxide as cyanobacteria flocculant
  • Application of diatomite-loaded magnetic nickel-iron layered double-metal hydroxide as cyanobacteria flocculant
  • Application of diatomite-loaded magnetic nickel-iron layered double-metal hydroxide as cyanobacteria flocculant

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Embodiment 1

[0036] The preparation method of the diatomite-loaded magnetic nickel-iron layered double hydroxide is as follows:

[0037] (1) Disperse 65 milliliters of deionized water and 80 milligrams of pure diatomaceous earth into a 100 milliliter beaker and stir for 3 minutes with magnetic force;

[0038] (2) Add subsequently to the diatomite suspension in step (1), nickel nitrate, ferric nitrate, urea and trisodium citrate, stir again for 30 minutes, wherein, Ni 2+ and Fe 3+The total molar mass of urea is 1.6mmol, urea is 2.88mmol, and trisodium citrate is 0.16mmol. Then, use a polytetrafluoroethylene-lined stainless steel autoclave to react at 180° C. for 24 hours. After the reaction was cooled to room temperature, it was centrifuged and washed three to four times with deionized water and ethanol. The obtained mixture was dried at 80 degrees Celsius for 4 hours to obtain the algal earth-supported magnetic nickel-iron layered double hydroxide flocculant DE@NiFe LDH.

[0039] Where...

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Abstract

The invention belongs to the field of water treatment, and particularly relates to application of diatomite-loaded magnetic nickel-iron layered double-metal hydroxide as a cyanobacteria flocculant. The morphology of the diatomite-loaded magnetic nickel-iron layered double-metal hydroxide is as follows: flower-shaped magnetic nickel-iron layered double-metal hydroxide grows on the surface of straight-chain diatomite-loaded sheet-shaped magnetic nickel-iron layered double-metal hydroxide. According to the preparation method, the nickel-iron layered double-metal oxide grows on the diatomite in situ through a one-step hydrothermal method, so that the diatomite-loaded magnetic nickel-iron layered double-metal hydroxide is obtained, and the agglomeration phenomenon of layered double-metal hydroxide nanoparticles is effectively avoided. In addition, in the material provided by the invention, the physical and chemical properties of the three-dimensional natural diatomite and the action of a biological template enable the material to have excellent adsorption performance, and the material is also suitable for being used as a carrier material. The two-dimensional ferronickel layered double-metal hydroxide can realize high-performance removal of blue-green algae.

Description

technical field [0001] The invention belongs to the field of water treatment, and in particular relates to the use of a diatomite-loaded magnetic nickel-iron layered double hydroxide as a cyanobacteria flocculant. Background technique [0002] With a massive increase in the population, renewable water resources are becoming critical to meet the growing demands for drinking water, agriculture and industry. Eutrophication leads to the occurrence of cyanobacteria blooms in the water source of lakes and reservoirs. Some cyanobacteria often multiply in large numbers in summer, and form a layer of blue-green and fishy-smelling floating foam on the water surface, which is called "water bloom". Large-scale algal blooms are known as "green tides". Green tides cause water quality to deteriorate, and in severe cases deplete the oxygen in the water and cause the death of fish. What's more serious is that some species of cyanobacteria (such as Microcystis) also produce toxins, and abou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52
Inventor 张育新戴兴健唐幸群刘晓英封丽赵丽李伟饶劲松代楠张臣智丁杰航晏鹏韩煦姚克欣晏琼成喜雨
Owner CHONGQING UNIV
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