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Red mud coated adsorption material for removing inorganic pollutants and preparation method thereof

A technology for adsorbing materials and pollutants, applied in chemical instruments and methods, adsorbed water/sewage treatment, and other chemical processes, can solve the problems of high application cost, high price, and high utilization rate of active components, and achieve efficient removal effect , low price, easy operation

Active Publication Date: 2011-11-16
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
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  • Description
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AI Technical Summary

Problems solved by technology

There are generally two kinds of water treatment granular adsorption materials used for the removal of inorganic pollutants in water. The first is the granular adsorbent made by direct granulation of the adsorption active components, and the second is to load the adsorption active components on the surface of the carrier. The granular adsorbent made by direct granulation has a low utilization rate of the active component, and the active component of the adsorbent made by loading the active component on the surface of the carrier has a high utilization rate of the active component
The loaded adsorbents currently used for the removal of inorganic pollutants in water, the loaded active components include activated alumina, hydroxy iron, zirconia, cerium oxide, lanthanum oxide, etc. These components are generally expensive, and the actual application cost is relatively high

Method used

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specific Embodiment approach

[0009] Weigh 500g of quartz sand with a particle size of 1-2mm as a hard carrier, mix it with 50g of red mud and put it into a rotary granulator to rotate, add 25ml of a 1% carboxymethylcellulose aqueous solution as a binder, drop After the addition, continue to rotate for 5 minutes, and the obtained sample is air-dried at room temperature, washed with water, and then air-dried to obtain the final product. The obtained product is used for phosphorus removal, with an adsorption capacity of 20 mg / g, and for the removal of chromium, cadmium, arsenic, and nickel, with an adsorption capacity of 25 mg / g.

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Abstract

Relating to the field of water treatment materials, the invention specifically relates to a red mud coated adsorption material for removing inorganic pollutants and a preparation method thereof. Red mud is adopted as the absorptive active component and a hard material is employed as the carrier. The surface of the hard material is coated with the absorptive active component red mud through a particular proportioned binder. After drying and washing of the coated material, a red mud coated adsorption material for removing phosphor and heavy metals can be obtained. With simple operation, the preparation process of the invention is suitable for on-site preparation and usage. With the industrial slag waste red mud as the raw material, the adsorption material provided in the invention can have a low price. As the raw material red mud adopted in the invention is rich in a plurality of absorptive active components of metallic oxides, so the application of the red mud coated adsorption material provided in the invention to remove inorganic pollutants can achieve efficient removing effect.

Description

technical field [0001] The invention relates to the field of water treatment materials, in particular to a red mud-coated adsorption material for removing inorganic pollutants and a preparation method thereof. Background technique [0002] The adsorption method of granular adsorbent is an important method for the removal of inorganic pollutants in water, and the performance of granular adsorbent is the key factor determining the removal effect of phosphorus and heavy metals. There are generally two kinds of water treatment granular adsorption materials used for the removal of inorganic pollutants in water. The first is the granular adsorbent made by direct granulation of the adsorption active components, and the second is to load the adsorption active components on the surface of the carrier. The granular adsorbent made by direct granulation has a low utilization rate of the active component, and the active component of the adsorbent made by loading the active component on t...

Claims

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Application Information

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IPC IPC(8): B01J20/08B01J20/30C02F1/28
Inventor 栾兆坤彭先佳贾智萍李亦然
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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