Composite material for removing arsenic in water and preparation method thereof

A composite material, water removal technology, applied in chemical instruments and methods, silicon compounds, other chemical processes, etc., can solve the problems of difficult separation and removal, poor removal of trivalent arsenic, and inconvenient operation.

Active Publication Date: 2016-01-13
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a composite material for removing arsenic in water and its preparation method, which overcomes the defects of poor removal effect of trivalent arsenic in the prior art, difficulty in separating and removing from water after adsorption, and inconvenient operation

Method used

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  • Composite material for removing arsenic in water and preparation method thereof

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Embodiment 1

[0022] A composite material for removing arsenic in water according to the invention, comprising the following components in parts by weight: 100 parts of bentonite, 1 part of polyferric chloride, and hydrolyzed titanium salt (hydrolyzed titanium salt is the hydrolyzed product of titanium tetrachloride in water) 4.8 parts, the montmorillonite content is 75% in the described bentonite. The amount of the polyferric salt is calculated by the mass of the iron element; the amount of the polyferric chloride is calculated by the mass of the iron element, and the amount of the hydrolyzed titanium salt is calculated by the mass of the titanium element.

Embodiment 2

[0024] A composite material for removing arsenic in water according to the invention comprises the following components in parts by weight: 100 parts of bentonite, 6 parts of polyferric sulfate, and 4.8 parts of hydrolyzed titanium salt, and the content of montmorillonite in the bentonite is 85%. The amount of the polyferric sulfate is calculated by the mass of the iron element; the amount of the hydrolyzed titanium salt is calculated by the mass of the titanium element.

Embodiment 3

[0026] A composite material for removing arsenic in water according to the present invention comprises the following components in parts by weight, 100 parts of bentonite, 1 part of polyferric sulfate, hydrolyzed titanium salt (hydrolyzed titanium salt is titanium tetrachloride in hydrochloric acid and sulfuric acid solution hydrolyzate) 0.8 part, and the montmorillonite content is 80% in the described bentonite. The amount of the polyferric sulfate is calculated by the mass of the iron element; the amount of the hydrolyzed titanium salt is calculated by the mass of the titanium element.

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Abstract

The invention relates to a composite capable of removing arsenic in water, and a preparation method thereof. The composite comprises the following ingredients in parts by weight: 100 parts of bentonite, 1-6 parts of polymerized ferric salt, 0.8-4.8 parts of hydrolyzed titanium salt, wherein the quantity of the polymerized ferric salt is determined by the mass of ferrum element; and the quantity of the hydrolyzed titanium salt is determined by the mass of titanium element. A ferrum-titanium bioxide intercalated modified composite is formed by intercalating the polymerized ferric salt and the hydrolyzed titanium salt into bentonite and drying and calcining, and the composite can realize the oxidization on trivalent arsenic and the synchronous and efficient removal on the trivalent arsenic and pentavalent arsenic under the illumination action.

Description

technical field [0001] The invention relates to a composite material for removing arsenic in water and a preparation method thereof, belonging to the field of water treatment materials. Background technique [0002] Arsenic is a carcinogen, excessive arsenic in drinking water can lead to chronic poisoning. At present, the method used to remove arsenic from drinking water is mainly the adsorption method, and the commonly used adsorbents in the adsorption method include activated alumina, etc. These adsorbents have good removal effect on pentavalent arsenic, but poor removal effect on trivalent arsenic. At the same time, since most of the adsorption materials used for arsenic removal in water are in the form of powder, it is difficult to separate and remove them from water after adsorption, which brings problems such as inconvenient operation. Therefore, the arsenic removal technology in drinking water urgently needs new materials that have good removal effects on trivalent a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/16B01J20/30C02F1/28C02F1/58
Inventor 彭先佳栾兆坤王军
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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