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Clay base composite absorbent and preparation method thereof

A composite adsorption and adsorbent technology, applied in chemical instruments and methods, adsorption water/sewage treatment, and other chemical processes, can solve the problems of limited adsorption capacity and achieve simple preparation process, good selective adsorption, and high particle strength Effect

Inactive Publication Date: 2009-06-17
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the adsorption capacity of clay to harmful pollutants in water is still limited.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1: Mix 5.32g of bentonite and 36ml of distilled water into a reaction flask equipped with a stirring device, then add 4.32g of acrylic acid, 3.55g of acrylamide, 0.12g of sodium lauryl sulfate, and 0.18g of N,N-2 methylenebisacrylamide and 0.40g ammonium persulfate, the temperature was raised to 70°C and kept for 3h. After the reaction, the product was washed with water, dried and pulverized. The pulverized product was activated with 1% alum solution at 90° C. for 1 h, filtered, washed and dried to obtain a granular product.

Embodiment 2

[0020] Example 2: Mix 5.98g of bentonite modified with cetyltrimethylammonium chloride and 36ml of distilled water into a reaction flask equipped with a stirring device, then add 4.32g of acrylic acid, 3.55g of acrylamide, 0.08g of Sodium dodecylbenzenesulfonate, 0.18g of N,N-2 methylenebisacrylamide and 0.40g of ammonium persulfate were heated up to 80°C and kept for 3h. After the reaction, the product was washed with water, dried and pulverized. The pulverized product was activated with 1% aluminum trichloride solution at 80° C. for 1 h, filtered, washed and dried to obtain a granular product.

Embodiment 3

[0021] Example 3: Mix 4.55g of attapulgite clay and 36ml of distilled water into a reaction flask equipped with a stirring device, then add 4.32g of acrylic acid, 3.55g of acrylamide, 0.10g of sodium lauryl sulfate, 0.30g of N,N- 2 methylene bisacrylamide and 0.40 g of ammonium persulfate, the temperature was raised to 90 ° C and kept for 3 h. After the reaction, the product was washed with water, dried and pulverized. The pulverized product was activated with 1% alum solution at 100° C. for 1 h, filtered, washed and dried to obtain a granular product.

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PUM

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Abstract

The invention discloses a clay-based composite sorbent and a preparation method thereof. Raw materials of the sorbent consists of crylic acid, acrylamide, a surface active agent, amine persulfate, N,N-2 methylene-bis-acrylamide, and the balance being natural clay or modified clay. The clay-based composite sorbent has simple preparation process, and the obtained granule has high strength, large specific surface area and excellent selective adsorption; therefore, the sorbent can be widely applied to the treatment of lake water containing nitrogen, phosphorus, heavy metal ion and organic pollutants.

Description

technical field [0001] The invention relates to a clay-based composite adsorbent and a preparation method thereof, in particular to an adsorbent for lake water treatment and a preparation method thereof. Background technique [0002] In recent years, due to the influence of many natural and human factors, nutrients such as nitrogen and phosphorus discharged into lakes and reservoirs have continued to increase, resulting in aggravated eutrophication of water bodies, which in turn led to more frequent outbreaks of algal blooms in various water bodies, and the scale is also increasing. getting bigger. Severe algal blooms will cover the water surface, prevent photosynthesis in the water body and its exchange with the atmosphere, rapidly reduce the concentration of dissolved oxygen in the water, cause the death of aquatic animals and plants, and damage the ecology and surrounding environment. These impacts have further seriously damaged the investment, aquaculture and tourism in...

Claims

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Application Information

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IPC IPC(8): B01J20/12B01J20/26C02F1/28
Inventor 王爱勤张俊平郑易安
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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