Zr-La composite metal oxide, preparation and application of Zr-La composite metal oxide for controlling eutrophication of water body and removing phosphate
A composite metal and oxide technology, which is applied in the direction of alkali metal oxides/hydroxides, alkali metal compounds, chemicals for biological control, etc., can solve the problem of high cost in the adsorption process, poor adsorption effect, and low cost To achieve the effect of inhibiting the growth of Escherichia coli, the adsorption can be recycled, and the adsorption is fast
Inactive Publication Date: 2017-06-30
HUAZHONG NORMAL UNIV
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Problems solved by technology
Because the chemical precipitation method will produce a large amount of precipitation and needs subsequent treatment, the cost of the adsorption process will increase, and it will cause secondary pollution, etc., and it is generally used less
Although biological treatment is still applied in industry, its cost is low, but its adsorption effect is not very good
Method used
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Embodiment 1
[0042] The preparation of the Zr-La composite metal oxide microsphere of embodiment 1Zr content 20%
[0043] The specific experimental steps are as follows:
[0044] 1), accurately weigh 0.0471g ZrOCl 2 ·8H 2 O and 0.2529g LaNO 3 ·6H 2 0, join in the large beaker that 97mL distilled water is housed, then take by weighing 3.0000g chitosan powder and slowly join in the above-mentioned solution under the condition of vigorous stirring, add 3mL glacial acetic acid in the above-mentioned mixed solution with pipette gun, Then seal the above solution with a parafilm, and continue stirring with a magnetic stirrer at room temperature for 24 hours to obtain a uniform and transparent solution;
[0045] 2), pour an appropriate amount of pre-prepared 3mol / L NaOH solution into a petri dish, use a 2mL syringe to draw the uniform and transparent precursor solution in step 1), and drop it into the NaOH solution drop by drop to obtain a white the small ball;
[0046] 3) After sealing the ...
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Abstract
The invention relates to a Zr-La composite metal oxide, a preparation and an application of Zr-La composite metal oxide for controlling eutrophication of water body and removing phosphate. The Zr-La composite metal oxide is Zr-La composite metal oxide microsphere composed of ZrO2 and La2O3, nanoparticles are accumulated on the surface of the microspheres, the microspheres surface contains hydroxy group and has a loose and porous structure. The Zr-La composite metal oxide employs a micro channel auxiliary injection method which is characterized in that an uniform transparent solution containing chitosan, a zirconium precursor and a lanthanum precursor is injected to a sodium hydroxide solution by a syringe to obtain the Zr-La hydroxide microspheres, and then the microspheres are calcined to obtain the product. According to the invention, the zirconium precursor is metered by zirconium content, the lanthanum precursor is metered by lanthanum content, and the mole percentage of zirconium in the zirconium precursor and the lanthanum precursor is 10-60 mol%. The Zr-La composite metal oxide has high removal efficiency for phosphate, short removal time, and good cycling stability. The Zr-La composite metal oxide has good application potential for controlling eutrophication of water body and removing phosphate.
Description
technical field [0001] The invention relates to a Zr-La composite metal oxide, its preparation and its application in controlling the eutrophication of water body to remove phosphate, and investigates its application in inhibiting the growth of Escherichia coli. Background technique [0002] Phosphorus is a resource with limited storage on the earth. It is an important component of nucleic acid and protein, and exists in the form of phospholipids in cell membranes, so it is an essential nutrient element for all living organisms. It participates in almost all physiological reactions of human life activities, and is very important for maintaining normal life activities and physiological functions of the human body. Due to the large demand for phosphorus in industry and agriculture, there are high concentrations of phosphorus in lakes and rivers, and excessive phosphorus in water bodies will cause eutrophication of water bodies. The occurrence of this phenomenon will stimulate...
Claims
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IPC IPC(8): B01J20/06B01J20/28B01J20/30C02F1/28A01N59/16A01P1/00C02F101/10
CPCA01N59/16B01J20/06B01J20/28021B01J2220/4806B01J2220/4812B01J2220/4825C02F1/281C02F2101/105A01N2300/00
Inventor 龚静鸣吴丹凤
Owner HUAZHONG NORMAL UNIV
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