Mineral material for removing arsenic and preparation method thereof

A technology of mineral materials and raw materials, applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc., can solve the problems of arsenic-containing drinking water engineering, cumbersome arsenic removal technology, and raw material production process costs Advanced problems, to achieve the effect of good arsenic removal, simple and feasible method, and low cost

Inactive Publication Date: 2014-04-02
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, as far as the current research results are concerned, my country's arsenic removal technology is too cumbersome, and the cost of raw materials and manufacturing processes is high, and it cannot be widely used in poor areas where drinking water contains excessive arsenic. not big

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Pulverize kaolin, siderite, pore-forming materials, and bonding materials, soak kaolin and siderite with 0.1mol / L potassium hydroxide, soak peanut shells with 40% phosphoric acid for 3 hours, and then wash the materials with water until neutral, 40% kaolin; 40% siderite; 15% pore-forming material; 5% bonding material mixed, pressed and molded, put into a muffle furnace for activation at 800°C, and the arsenic removal material was obtained. The arsenic removal rate of the static test was 85%.

Embodiment 2

[0018] Pulverize kaolin, siderite, pore-forming materials, and bonding materials, soak kaolin and siderite with 0.3mol / L potassium hydroxide, soak peanut shells with 60% phosphoric acid for 6 hours, and then wash the materials with water until neutral, 35% of kaolin, 40% of siderite, and 25% of pore-forming material are mixed according to the proportion, pressed and formed, put into a muffle furnace for activation at 1000°C, and the arsenic removal material is obtained, and the arsenic removal rate of the static test is 92%.

Embodiment 3

[0020] Pulverize kaolin, siderite, pore-forming materials, and bonding materials, soak kaolin and siderite with 0.2mol / L potassium hydroxide, soak peanut shells with 50% phosphoric acid for 5 hours, and then wash the materials with water until neutral, 40% of kaolin; 40% of siderite; 15% of pore-forming material; 5% of bonding material are mixed, pressed and molded, put into a muffle furnace for activation at 900°C, and the arsenic removal material is obtained. The arsenic removal rate of the static test is 93%.

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Abstract

The invention discloses a mineral material for absorbing and removing arsenic in water and a preparation method thereof. The mineral material is prepared by comprising the following steps: taking kaoline, siderite and the like as raw materials and adopting fruit shell, e.g. peanut shell, as a pore forming material; properly adding a small amount of binding materials; and carrying out chemical and high-temperature calcinating and activation. The mineral material comprises the following raw materials in percentage by weight: 35% to 40% of the kaoline, 35% to 40% of the siderite, 10% to 20% of the pore forming material and 5% to 10% of the binding material. In the invention, the preparation method of the arsenic removal material is simple and practicable, and is low in cost. Actual application test result proves that the arsenic removal material has a good effect of absorbing and removing the arsenic.

Description

technical field [0001] The invention relates to a mineral material used for removing arsenic in water and a preparation method thereof. Background technique [0002] In nature, the average content of arsenic is 1.8 mg / kg, among which the average content of rocks is between 1 and 2 mg / kg; the average content of soil is about 5 mg / kg, but some soils can reach hundreds of mg / kg; the content of clay layer It is about 13mg / kg, but the clay layer in the loose sediment layer in some places along the coast of my country has a content as high as 20mg / kg or more. [0003] Excessive arsenic in drinking water can lead to chronic poisoning. Initially, countries around the world established a hygienic standard of 0.05mg / L for arsenic in drinking water based on the prevention and treatment of chronic arsenic poisoning caused by excessive intake of arsenic in drinking water. In recent years, a large number of epidemiological investigations have shown that arsenic may cause various cancers ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/12C02F1/28C02F1/58
Inventor 冯流刘欣陈明赵青涛高峰
Owner BEIJING UNIV OF CHEM TECH
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