Cr(VI) (hexavalent chromium) deep adsorption stabilized material for water body and preparation method and application thereof

A technology of deep adsorption and hexavalent chromium, applied in chemical instruments and methods, adsorption water/sewage treatment, water pollutants, etc., can solve the problems that it is difficult to completely remove chromium pollution, cannot be implemented in natural water bodies, and the removal process is cumbersome. Achieve the effect of excellent removal effect, low cost and easy access to raw materials

Inactive Publication Date: 2018-10-16
芜湖格丰环保科技研究院有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The removal process of this technical solution is cumbersome, and the cost is high when a large amount of treatment is performed, so it cannot be implemented in natural water bodies
[0004] The physical adsorption method uses a substance with a high surface area or a porous structure on the surface as a composite adsorption material, and its adsorption performance is stable, but it is difficult to completely remove chromium pollution and meet the national sewage discharge standard only by the adsorption of a single type of material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A material for deep adsorption and stabilization of hexavalent chromium in water, comprising the following raw materials by weight: 5 parts sepiolite, 20 parts attapulgite, 25 parts bentonite, 5 parts iron oxide, 5 parts aluminum oxide, 25 parts Parts of ferrous sulfate heptahydrate, 5 parts of polyacrylamide.

[0027] The preparation method includes the following steps:

[0028] (1) Attapulgite, bentonite, and sepiolite were crushed and sieved to 200-300 mesh, and dried in a rotary kiln at 110°C for 2 hours, then stored in a silo for later use;

[0029] (2) Weigh 5 parts of sepiolite, 20 parts of attapulgite, 25 parts of bentonite and formula amount of iron aluminum oxide, ferrous sulfate heptahydrate, polyacrylamide, and vacuum suction into the mixture Mix and stir in the machine for 30 minutes to obtain the hexavalent chromium deep adsorption stabilized material in the water body.

[0030] The hexavalent chromium deep adsorption and stabilization material obtained in this e...

Embodiment 2

[0033] A material for deep adsorption and stabilization of hexavalent chromium in water, comprising the following parts by weight of raw materials: 5 parts of sepiolite, 20 parts of attapulgite, 35 parts of bentonite, 15 parts of iron oxide, 15 parts of ferrous sulfate heptahydrate , 10 parts of iron sulfate, 9 parts of polyaluminum chloride.

[0034] The preparation method includes the following steps:

[0035] (1) Attapulgite, bentonite, and sepiolite were crushed and sieved to 200-300 meshes respectively, and dried in a rotary kiln at 120°C for 2 hours, then stored in a silo for later use;

[0036] (2) Weigh 5 parts of sepiolite, 20 parts of attapulgite, 35 parts of bentonite and formula amount of iron oxide, ferrous sulfate heptahydrate, ferric sulfate, polyaluminum chloride, and vacuum suction material Mix and stir in a mixing machine for 30 minutes to obtain the deep adsorption and stabilization material of hexavalent chromium in the water body.

[0037] The hexavalent chromium...

Embodiment 3

[0040] A material for deep adsorption and stabilization of hexavalent chromium in water, comprising the following parts by weight of raw materials: 5 parts sepiolite, 15 parts attapulgite, 35 parts bentonite, 10 parts iron oxide, 5 parts aluminum oxide, 25 parts of ferrous sulfate heptahydrate, 10 parts of ferric chloride, 5 parts of polyferric sulfate.

[0041] The preparation method includes the following steps:

[0042] (1) Attapulgite, bentonite, and sepiolite are respectively crushed and sieved to 200-300 mesh, and dried in a rotary kiln at 140°C for 2 hours, then stored in a silo for later use;

[0043] (2) Weigh the treated 5 parts of sepiolite, 15 parts of attapulgite, 35 parts of bentonite and formula amount of iron aluminum oxide, ferrous sulfate heptahydrate, ferric chloride, polyferric sulfate, vacuum suction The materials are mixed and stirred in a mixing machine for 30 minutes to obtain the deep adsorption and stabilization material of hexavalent chromium in the water ...

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Abstract

The invention discloses a Cr(VI) (hexavalent chromium) deep adsorption stabilized material for a water body and a preparation method and application thereof. The Cr(VI) deep adsorption stabilized material for the water body is prepared from the following raw materials in parts by weight: 5 parts of sepiolite, 15 to 20 parts of attapulgite, 25 to 55 parts of bentonite, 8 to 25 parts of metal oxide,25 to 35 parts of iron salt, and 5 to 10 parts of auxiliary adsorbent. The preparation method comprises the following steps of crushing the sepiolite, the attapulgite and the bentonite until the particle size is 200 to 300 meshes, and mixing with the metal oxide, the iron salt and the auxiliary adsorbent according to the formula ratio. The Cr(VI) deep adsorption stabilized material has the advantages that the preparation technology is simple, the implementing is convenient and rapid, and the removal efficiency of Cr(VI) is high; the removal rate of Cr(VI) can reach 99% or above in a water sample with the Cr(VI) concentration lower than 50ppm, the Cr(VI) concentration in the treated water body is far below 0.050mg/L, the requirement of Class II water body standard in Environmental QualityStandard for Surface Water (GB3838-2002) of China can be met, the secondary release risk is avoided, and the Cr(VI) deep adsorption stabilized material is suitable for the deep control of various industrial wastewater containing Cr(VI), natural water bodies polluted by the Cr(VI) and the like.

Description

Technical field [0001] The invention belongs to the technical field of water treatment, and specifically relates to a material for deep adsorption and stabilization of hexavalent chromium in water and a preparation method and application thereof. Background technique [0002] Chromium and its compounds are widely involved in various fields of industrial production, such as metallurgy, electroplating, tanning, paint, pigments, printing and dyeing, pharmaceuticals and other industries have chromium-containing pollutants. They are not perfect while pursuing rapid development and high benefits. The production process and unreasonable pollution discharge methods have caused these industries to discharge large amounts of chromium-containing harmful substances to pollute the environment. Chromium in water mainly exists in two valence forms: Cr(Ⅲ) and Cr(Ⅵ). Among them, hexavalent chromium is the main environmental pollution toxin, and its toxicity is 100 times higher than that of trival...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/12B01J20/26B01J20/30C02F1/28C02F101/22
CPCB01J20/0229B01J20/0248B01J20/0281B01J20/0288B01J20/06B01J20/08B01J20/10B01J20/12B01J20/261B01J2220/42B01J2220/46B01J2220/4806B01J2220/4812C02F1/281C02F1/285C02F2101/22
Inventor 郭进进章文贵龚梅玲宁小飞奉向东
Owner 芜湖格丰环保科技研究院有限公司
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