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High-activity mud adsorbent and its production

An adsorbent and high-activity technology, applied in chemical instruments and methods, other chemical processes, silicon compounds, etc., can solve problems such as secondary waste of resources, polluted water sources, high content of aluminum, iron, and calcium, and achieve the amount of adsorbent The effects of less, faster adsorption, and increased phosphorus adsorption

Inactive Publication Date: 2007-06-20
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

A large amount of red mud is stored by wet or dry method, which not only has too high alkalinity, pollutes water sources, and occupies a large amount of land, but also has high content of aluminum, iron, and calcium in red mud, and many available components cannot be rationally utilized, resulting in resources. Secondary waste, research on the comprehensive utilization of red mud is imperative

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Add the red mud sample into an acid solution of a certain concentration, the liquid-solid ratio is 15ml / g, the acid concentration is 0.5mol / l, and it is activated by heating in a water bath at 70°C and stirring for 1 hour. After the activation reaction is completed, the solid matter in the reaction system is washed with water, filtered, and dried to obtain a highly active red mud adsorbent.

[0020] The highly active red mud was used as an adsorbent for phosphorus-containing wastewater, and adsorption experiments were carried out under the conditions of a temperature of 25°C, an initial pH of 8, and an initial concentration of 155 mg P / l. When the phosphorus concentration at the adsorption equilibrium is 2 mg / l, the measured equilibrium adsorption capacity of the adsorbent reaches 18.2 mg P / g, which is twice the adsorption capacity of the activated alumina of the control group under the same conditions.

Embodiment 2

[0022] Add the red mud sample into an acid solution of a certain concentration, the liquid-solid ratio is 18ml / g, the acid concentration is 0.3mol / l, and it is activated under the condition of heating in a water bath at 80°C and stirring for 1 hour. After the activation reaction is completed, the solid matter in the reaction system is washed with water, filtered, and dried to obtain a highly active red mud adsorbent.

[0023] The highly active red mud was used as an adsorbent for phosphorus-containing wastewater, and the adsorption experiment was carried out under the conditions of a temperature of 25°C, an initial pH of 7, and an initial concentration of 155 mg P / l. When the phosphorus concentration at adsorption equilibrium is 2 mg / l, the measured equilibrium adsorption capacity of the adsorbent reaches 23.2 mg P / g, which is nearly three times that of the control group activated alumina under the same conditions.

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Abstract

A high-activity red mud adsorbent used for treating the P contained sewage is prepared from the red mud rejected in preparing alumina through proportionally mixing it with acid solution, heating by water bath while reacting to generate solid product, water washing, filtering and baking. It has high adsorptive volume.

Description

technical field [0001] The invention relates to a red mud adsorbent and a preparation method thereof, belonging to the technical field of water treatment. Background technique [0002] The eutrophication of water bodies has long been a worldwide concern, and excessive phosphorus is the key element causing eutrophication of water bodies. The 2004 China Environmental Status Bulletin pointed out the current situation of lake eutrophication in my country: Among the 27 key lakes and reservoirs monitored in 2004, 20 lakes and reservoirs had water quality below Class IV, accounting for 74.1%. Among them, the water quality of the "three lakes" (Taihu Lake, Chaohu Lake, and Dianchi Lake) is inferior to Class V, and the main pollution indicators are total nitrogen and total phosphorus. The key to preventing eutrophication of water bodies is to control the phosphorus content in water bodies. Wastewater phosphorus control and phosphorus removal are important means to prevent and contro...

Claims

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Application Information

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IPC IPC(8): B01J20/10B01J20/30
Inventor 栾兆坤李燕中陈朝阳张忠国贾智萍
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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