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Preparation method for heavy metal adsorption material

A technology for adsorption materials and heavy metals, which is applied in the field of preparation of adsorption materials. It can solve the problems of poor adsorption of heavy metals, failure to remove arsenic and heavy metals, and failure to meet the requirements of arsenic filtration. It achieves high adsorption and fixation functions, low cost, and mild reaction conditions. Effect

Inactive Publication Date: 2017-05-31
HENAN TIMECLOUD COMM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even if the removal rate of trivalent arsenic by modern technology such as reverse osmosis membrane (RO) is only about 50%, it cannot meet the filtration requirements for arsenic
In addition, the filter material must take into account the immobilization problem after adsorption for the filtration of arsenic and extremely toxic heavy metals
Traditional porous ceramics and ceramic filter elements use the natural porous structure of diatomite to remove bacteria and macromolecular organic matter, but cannot remove arsenic and heavy metals in the ion state
In the existing technology, raw materials such as montmorillonite and medical stone are mostly used, which have a strong adsorption force for heavy metal ions and harmful toxins. Limestone has a huge reserve in my country, but it does not swell in water for a long time, and absorbs The effect of heavy metals is poor, so there is little information about using limestone as a raw material for the treatment of heavy metals, etc.

Method used

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  • Preparation method for heavy metal adsorption material

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Effect test

Embodiment 1

[0016] In the embodiment of the present invention, a heavy metal adsorption material is composed of the following raw materials in parts by weight: 38 parts of limestone, 11 parts of tetrahydrofurfuryl alcohol, 3 parts of calcium carbonate, and 15 parts of polyethylene resin.

[0017] Mix tetrahydrofurfuryl alcohol with 9.8 times its mass of water to prepare a tetrahydrofurfuryl alcohol solution; mix calcium carbonate with 3.8 times its mass of deionized water to prepare a calcium carbonate solution. Mix and grind limestone and polyethylene resin, pass through a 100-mesh sieve, then add tetrahydrofurfuryl alcohol solution, heat and stir at 83°C for 65 minutes, then lower the temperature to 70°C, add calcium carbonate solution dropwise while stirring, and then heat up to Ultrasonic treatment at 128°C for 30min with an ultrasonic power of 600W, then stirring at 100°C until dry, and then calcining at 330°C for 3.8h to obtain the filter material.

Embodiment 2

[0019] In the embodiment of the present invention, a heavy metal adsorption material is composed of the following raw materials in parts by weight: 46 parts of limestone, 19 parts of tetrahydrofurfuryl alcohol, 7 parts of calcium carbonate, and 23 parts of polyethylene resin.

[0020] Mix tetrahydrofurfuryl alcohol with 9.8 times its mass of water to prepare a tetrahydrofurfuryl alcohol solution; mix calcium carbonate with 3.8 times its mass of deionized water to prepare a calcium carbonate solution. Mix and grind limestone and polyethylene resin, pass through a 100-mesh sieve, then add tetrahydrofurfuryl alcohol solution, heat and stir at 83°C for 70 minutes, then lower the temperature to 70°C and add calcium carbonate solution dropwise while stirring, and then heat up to Ultrasonic treatment at 128°C for 30min with an ultrasonic power of 600W, then stirring at 100°C until dry, and then calcining at 330°C for 3.8h to obtain the filter material.

Embodiment 3

[0022] In the embodiment of the present invention, a heavy metal adsorption material is composed of the following raw materials in parts by weight: 40 parts of limestone, 13 parts of tetrahydrofurfuryl alcohol, 4 parts of calcium carbonate, and 17 parts of polyethylene resin.

[0023] Mix tetrahydrofurfuryl alcohol with 9.8 times its mass of water to prepare a tetrahydrofurfuryl alcohol solution; mix calcium carbonate with 3.8 times its mass of deionized water to prepare a calcium carbonate solution. Mix and grind limestone and polyethylene resin, pass through a 100-mesh sieve, then add tetrahydrofurfuryl alcohol solution, heat and stir at 83°C for 68 minutes, then lower the temperature to 70°C, add calcium carbonate solution dropwise while stirring, and then heat up to Ultrasonic treatment at 128°C for 30min with an ultrasonic power of 600W, then stirring at 100°C until dry, and then calcining at 330°C for 3.8h to obtain the filter material.

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Abstract

The invention discloses a preparation method for a heavy metal adsorption material. The adsorption material is prepared from the following raw materials in parts by weight: 38 to 46 parts of limestone, 11 to 19 parts of tetrahydrofurfuryl alcohol, 3 to 7 parts of calcium carbonate and 15 to 23 parts of a polyethylene resin. The adsorption material is obtained by mixing and grinding the limestone and the polyethylene resin, adding a tetrahydrofurfuryl alcohol solution for sealed heating and stirring, adding dropwise a calcium carbonate solution, performing high-temperature ultrasonic treatment, stirring the mixture to dry and performing high-temperature calcination. The adsorption material has a good function of highly adsorbing and fixing trivalent arsenic and pentavalent arsenic, and is high in heavy metal ion removal rate; water filtered by the adsorption material is stable in alkalescence. The adsorption material is mainly applied to water and wastewater filtering, and can be treated with an acid and re-calcined to be repeatedly recycled after being used. The preparation method is mild in reaction condition, easy to operate and low in cost.

Description

technical field [0001] The invention relates to the technical field of water treatment materials, in particular to a method for preparing an adsorption material for heavy metals. Background technique [0002] Arsenic is one of the highly toxic elements, and it is also the main inorganic toxin removed in the drinking water standards of various countries. It exists mostly in trivalent and pentavalent states in natural water bodies. However, as a metal element, it does not exist in the state of common cations, but mainly exists in the form of arsenite and arsenate. Even modern technologies such as reverse osmosis membrane (RO) have a removal rate of only about 50% for trivalent arsenic, which cannot meet the filtering requirements for arsenic. In addition, the filter material must take into account the fixation problem after adsorption for the filtration of arsenic and extremely toxic heavy metals. Traditional porous ceramics and ceramic filter elements can remove bacteria a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/30B01J20/22C02F1/28C02F101/10C02F101/20C02F101/22
CPCB01J20/043B01J20/22B01J2220/48B01J2220/4806B01J2220/4812C02F1/281C02F2101/103C02F2101/20C02F2101/206C02F2101/22
Inventor 不公告发明人
Owner HENAN TIMECLOUD COMM TECH CO LTD
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