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Preparation method of diatomite heavy-metal adsorption material

An adsorption material, diatomite technology, applied in chemical instruments and methods, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of poor dispersion of aluminum magnesium hydroxide metal oxides and insufficient contact of heavy metal ions , affect the adsorption effect and other issues, to achieve the effect of convenient operation, effective removal, and easy large-scale industrial production

Inactive Publication Date: 2013-01-23
CHANGSHA UNIVERSITY
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Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation method of diatomite heavy metal adsorption material. The method adopts diatomite as a load material, which can effectively improve the removal ability of aluminum-magnesium oxymetallic oxides to heavy metal ions in water, thereby solving the problem of aluminum-magnesium Hydroxy metal oxides have poor dispersion and cannot fully contact with heavy metal ions in water, which affects the adsorption effect. It provides a new material for the adsorption and removal of heavy metal ions in water.

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  • Preparation method of diatomite heavy-metal adsorption material
  • Preparation method of diatomite heavy-metal adsorption material
  • Preparation method of diatomite heavy-metal adsorption material

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Embodiment 1

[0030] Prepare aluminum chloride solution with a mass concentration of 325g / L and magnesium chloride solution with a mass concentration of 50g / L respectively, mix equal volumes to form a mixed solution A, and heat solution A to 60oC; the molar ratio of sodium carbonate and sodium hydroxide is 1:1 Mix and make solution B of 95g / L, heat solution B to 70oC; add diatomaceous earth in the amount of 10g / L to the heated solution A, under the condition of stirring speed of 250r / min Mix for 10 minutes; then add an equal volume of solution B that has been heated up, and react for 15 minutes under the condition of stirring speed of 350r / min; perform suction filtration after standing still for 20 minutes, and repeatedly rinse the filter cake with deionized water until the filtrate no longer contains aluminum ions and carbonate ions; then dried at 105oC for 120min, and naturally cooled to room temperature to obtain diatomaceous earth-loaded aluminum magnesium oxyhydroxide heavy metal adsorp...

Embodiment 2

[0033] Prepare the aluminum chloride solution with a mass concentration of 325g / L and the magnesium chloride solution with a mass concentration of 50g / L respectively, mix equal volumes to form a mixed solution A, and heat the solution A to 80oC; the molar ratio of sodium carbonate and sodium hydroxide is 1:1 Mix and make solution B of 95g / L, heat solution B to 80oC; add diatomaceous earth in the amount of 10g / L to the heated solution A, under the condition of stirring speed of 250r / min Mix for 10 minutes; then add an equal volume of solution B that has been heated up, and react for 25 minutes at a stirring speed of 350r / min; perform suction filtration after standing still for 20 minutes, and repeatedly rinse the filter cake with deionized water until the filtrate no longer contains aluminum ions and carbonate ions; then dried at 105oC for 120min, and naturally cooled to room temperature to obtain diatomaceous earth-loaded aluminum magnesium oxyhydroxide heavy metal adsorption m...

Embodiment 3

[0036]Prepare the aluminum chloride solution with a mass concentration of 325g / L and the magnesium chloride solution with a mass concentration of 50g / L respectively, mix equal volumes to form a mixed solution A, and heat the solution A to 80oC; the molar ratio of sodium carbonate and sodium hydroxide is 1:1 Mix and make solution B of 95g / L, heat solution B to 80oC; add diatomaceous earth in the amount of 10g / L to the heated solution A, under the condition of stirring speed of 250r / min Mix for 10 minutes; then add an equal volume of solution B that has been heated up, and react for 25 minutes at a stirring speed of 350r / min; perform suction filtration after standing still for 20 minutes, and repeatedly rinse the filter cake with deionized water until the filtrate no longer contains aluminum ions and carbonate ions; then dried at 105oC for 120min, and naturally cooled to room temperature to obtain diatomaceous earth-loaded aluminum magnesium oxyhydroxide heavy metal adsorption ma...

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Abstract

The invention provides a preparation method of a diatomite heavy-metal adsorption material. The method comprises the following steps of: loading an aluminum-magnesium hydroxyl metal oxide on the surface of diatomite by utilizing a co-precipitation method; and washing and drying to obtain the diatomite heavy-metal adsorption material. The preparation method disclosed by the invention has a unique process and is convenient to operate; the large-scale industrial production is easily realized and the dispersion performance of the aluminum-magnesium hydroxyl metal oxide in a water solution is easily improved, the contact between an adsorbent and each metal ion in the water solution is enhanced and the adsorption efficiency is improved; and the preparation method facilitates the bonding between the surface of the diatomite and the aluminum-magnesium hydroxyl metal oxide to form a chemical bond, so as to improve the loading stability. The invention can further expand the application of the diatomite in a water quality purification field and provides a novel concept for removing heavy-metal ions in water body.

Description

technical field [0001] The invention belongs to the field of preparation and application of organic functional materials, in particular to a preparation method of a diatomite heavy metal adsorption material. The diatomite-supported Al-Mg metal oxyhydroxide adsorption material prepared by this method has broad application prospects, especially for removing heavy metal ions in drinking water. Background technique [0002] Heavy metals refer to metals with a specific gravity greater than 1, such as copper (Cu), lead (Pb), nickel (Ni), manganese (Mn), cadmium (Cd), mercury (Hg), molybdenum (Mo), etc., there are about 45 kinds ; while heavy metal pollution mainly refers to Hg, Cd, Pb, Cr and metalloid As with significant biological toxicity. Compared with other pollutants, heavy metal pollution has its unique characteristics: one is toxic; the other is long-term treatment; the third is enrichment; the fourth is concealment. In view of the fact that heavy metal pollution has bro...

Claims

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Application Information

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IPC IPC(8): B01J20/14B01J20/30C02F1/28C02F1/62
Inventor 宋勇欧阳雄武刘力余取民
Owner CHANGSHA UNIVERSITY
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