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Harmful-substance processing material, its manufacturing method and harmful-substance processing method

A technology for harmful substances and treatment methods, applied in separation methods, water/sewage treatment, chemical instruments and methods, etc., which can solve the problems of reduced adsorption capacity, high price, and less satisfactory results

Active Publication Date: 2014-05-14
日铁水泥株式会社 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problem is that if there are coexisting anions, the adsorption amount of these oxyanions and phosphate ions will be reduced.
[0012] As mentioned above, although there are many ways to remove heavy metal ions, phosphorus and fluorine in water or soil, few of them are satisfactory and the price is high.

Method used

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  • Harmful-substance processing material, its manufacturing method and harmful-substance processing method
  • Harmful-substance processing material, its manufacturing method and harmful-substance processing method
  • Harmful-substance processing material, its manufacturing method and harmful-substance processing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Active porous calcium silicate particles, using a commercially available lightweight air cell concrete board (manufactured by Clion Co., Ltd., SiO ２ : 49.5%, CaO: 35.3%, Al 2 o 3 : 4.4%, Fe 2 o 3 : 2.6%. SiO ２ / CaO ratio = 1.4) After drying and crushing, adjust to calcium silicate particles with a particle diameter of 1.2 mm or less and 0.1 mm or more. In addition, commercially available light calcined magnesia (manufactured by Ube Material Co., Ltd.) was used as a magnesium raw material, and commercially available aluminum sulfate powder (trade name: aluminum sulfate) was used as a pH adjuster.

[0050] Using a mixing mixer, stir and mix 40 weight units of calcium silicate particles, 30 weight units of light calcined magnesium oxide, 10 weight units of aluminum sulfate and 8 weight units of water at room temperature for 5 minutes, and then put them in a closed container It was allowed to stand still for 12 hours to undergo a hydration reaction to obtain a pow...

Embodiment 2

[0054] Using the same calcium silicate particles, magnesium raw materials, and aluminum sulfate as in Example 1, 10 weight units of calcium silicate particles, 3 weight units of light calcined magnesia, 1 weight unit of aluminum sulfate and 2 weight units were mixed with a mixing mixer. A unit of water was stirred and mixed at room temperature for 5 minutes, then placed in a closed container and left to stand for 12 hours for hydration reaction to obtain a powdery reactant (processing material 2) with an average particle size of 0.3 mm and a volume ratio of 0.76. The chemical composition of the powder reactant is SiO ２ : 21.3%, Al 2 o 3 : 2.4%, CaO: 16.5%, MgO: 35.8%, Fe 2 o 3 : 1.6%, SO 3 : 7.5%, moisture: 14.3%. In addition, after pulverizing the powdery reactant and analyzing it with an X-ray powder analyzer, it was found that there were peaks in the reaction including magnesium oxide, magnesium hydroxide, gypsum dihydrate, calcium silicate hydrate, silicon dioxide, an...

Embodiment 3

[0056] Using the same method as in Example 1, the commercially available lightweight cellular concrete slabs were pulverized and adjusted to calcium silicate particles with a particle size of 4.0-1.2 mm. And use the same magnesium raw material and aluminum sulfate as in Example 1.

[0057] Using a mixing mixer, stir and mix 4 weight units of porous calcium silicate, 3 weight units of light calcined magnesia, 1 weight unit of aluminum sulfate and 3 weight units of water at room temperature for 2 minutes, and then put them into an airtight container The mixture was allowed to stand in the middle for 12 hours to undergo a hydration reaction to obtain a granular reactant (processing material 3) with an average particle diameter of 4 mm and a volume ratio of 0.91. The chemical composition of the granular reactant is SiO ２ : 20.4%, Al 2 o 3 : 5.1%, CaO: 16.0%, MgO: 39.6%, Fe 2 o 3 : 1.8%, SO 3 : 16.7%, moisture: 25.2%. In addition, when the granular reactant was pulverized an...

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Abstract

The invention provides a processing material for adsorption and removal of harmful substances in heavy metal ion harmful substance-containing water, and the harmful-substance processing material is prepared by adhesion curing or hydration reaction of one or more than two magnesium compounds selected from magnesium oxide, magnesium hydroxide, magnesium carbonate and hydrotalcite in active porous calcium silicate particles. The harmful-substance processing material can effectively remove arsenic, lead, cadmium, chromium, selenium, cesium, zinc and other heavy metals, and phosphate, fluoride and other elements, is good in stability after adsorption of the heavy metals, the harmful substances may not be redissolved out with as time goes by or due to oxidation, and a lot of subsequent processing is not needed.

Description

[0001] technical field [0002] The present invention relates to a treatment material for removing heavy metal elements such as arsenic, cadmium, selenium, chromium, cesium, zinc, lead and harmful substances such as phosphoric acid and fluorine in water and a manufacturing method thereof. [0003] Background technique [0004] Adding slaked lime powder or mud to water is a common method to remove harmful substances in water. The cost of this method is low, and the treatment effect of harmful substances is also better. However, if the water contains a large amount of sulfate ions and iron ions, as the pH value increases, the iron ions will be precipitated as ferric hydroxide colloids, and Slaked lime reacts with sulfate ions to form insoluble gypsum, and together with unreacted slaked lime used as a neutralizing material, it precipitates as a viscous substance with high water content and poor dehydration properties. The viscous is poor dehydration and highly water-containin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/10B01J20/30C02F1/28C02F101/20C02F101/14C02F101/10
CPCB01D39/06B01J20/10B01J20/041B01J20/043B01J20/3204B01J20/3236C02F1/288C02F2101/20
Inventor 大石徹
Owner 日铁水泥株式会社
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