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Ni-Mg-Al type hydrotalcite and preparation method and application thereof

A hydrotalcite, hydrothermal reactor technology, applied in chemical instruments and methods, water pollutants, other chemical processes, etc., can solve the problems of short phosphorus adsorption operation period and low capacity, etc.

Inactive Publication Date: 2019-02-15
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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Problems solved by technology

[0003] To sum up, the existing problems in the prior art are: phosphorus adsorption currently has short operating cycle and low capacity.

Method used

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  • Ni-Mg-Al type hydrotalcite and preparation method and application thereof
  • Ni-Mg-Al type hydrotalcite and preparation method and application thereof
  • Ni-Mg-Al type hydrotalcite and preparation method and application thereof

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Embodiment Construction

[0028] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0029] The present invention aims to solve the problems of short operating period and low capacity in phosphorus adsorption; the initial pH of Ni-Mg-Al hydrotalcite is 6, the amount of adsorbent is 0.001g, and the phosphorus concentration of phosphorus-containing wastewater is 20mg / L. Under the condition that the temperature is 50℃ and the adsorption time is 4h, the phosphorus removal rate of the simulated phosphorus-containing wastewater reaches 95.21%. According to the isotherm and adsorption kinetics of hydrotalcite-like adsorption of phosphorus, the thermodynamic parameters of phosphorus adsorption process were calculat...

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Abstract

The invention belongs to the technical field of aluminum compounds, and discloses Ni-Mg-Al type hydrotalcite and a preparation method and application thereof. The preparation method comprises the following steps: adding various solutions having a urea use amount of 20 mL in a metal ion mole ratio of 3:1:3 to obtain a mixed solution, putting the mixed solution on a constant-temperature magnetic stirrer at normal temperature, continuously and uniformly stirring for 1 h, and transferring the stirred solution into a hydrothermal reaction kettle; sealing the reaction kettle, putting the reaction kettle into a vacuum drying box for hydrothermal crystallization at certain temperature for 10 h, wherein the crystallization temperature is 150 DEG C; at the end of the reaction, taking out the reaction kettle, sucking and filtering a substance therein with a circulating water type vacuum pump, and collecting the substance; washing the obtained product with new boiled distilled water till the pH isless than 8, sucking and filtering with the circulating water type vacuum pump, and collecting a product; putting the product into an air blasting drying box for drying at 80 DEG C for 12 h; grindingthe product, and sieving the product with a sieve of 200 meshes. The phosphorus removal rate for simulated phosphorus-containing wastewater reaches 95.21 percent.

Description

technical field [0001] The invention belongs to the technical field of aluminum compounds, and in particular relates to a Ni-Mg-Al hydrotalcite and its preparation method and application. Background technique [0002] At present, the existing technology commonly used in the industry is as follows: China is a country with a major problem of insufficient water resources. The country accelerates the construction of modern cities and the rapid development of industry and agriculture, which brings people a high quality of life, but inevitably brings pollution. Wastewater treatment is one of the pollution problems, large quantities of sewage discharge, bring great harm. Among them are sewage from daily life, and wastewater from industry and agriculture. If the nutrient elements contained exceed the standard, it will cause serious water pollution. Excessive phosphorus content is an important factor affecting eutrophic water pollution. Nowadays, it is found that hydrotalcite-like...

Claims

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Application Information

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IPC IPC(8): B01J20/08B01J20/30C02F1/28C02F101/10
CPCB01J20/08C02F1/281C02F2101/105
Inventor 周良芹袁东谭文渊范金龙
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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