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Heavy metal composite adsorbent and method for preparing same

A composite adsorption and adsorbent technology, which is applied in chemical instruments and methods, adsorption water/sewage treatment, and other chemical processes, can solve the problems of limited adsorption capacity of metal ions, etc., and achieve the convenience of large-scale production, simple preparation process, high-efficiency The effect of the ability to adsorb heavy metals

Inactive Publication Date: 2010-03-10
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 natural diatomite to metal ions is still limited.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Put 2 grams of natural diatomaceous earth in a beaker, add 30 mL of distilled water, and stir for 30 minutes. Weigh 16 grams of acrylamide, add 20 milliliters of distilled water, and dissolve under stirring. Add diatomaceous earth that has been stirred into a suspension into the acrylamide solution, then add 0.01 g of N,N' methylenebisacrylamide, stir for 30 minutes, and then add 0.018 g of ammonium persulfate. The temperature was raised to 90° C. and maintained for 3 hours. The product was dried at 70°C until constant weight, crushed, and passed through a 40-mesh sieve.

Embodiment 2

[0016] Put 25 grams of natural diatomaceous earth in a beaker, add 350 mL of distilled water, and stir for 30 minutes. Weigh 150 g of acrylamide, add 180 ml of distilled water, and dissolve under stirring. Add the diatomite that has been stirred into a suspension into the acrylamide solution, then add 0.16 g of aluminum sulfate, stir for 30 minutes, and then add 0.21 g of cerium ammonium nitrate. The temperature was raised to 80° C. and kept for 5 hours. The product was dried at 70°C until constant weight, crushed, and passed through a 40-mesh sieve.

Embodiment 3

[0018] Place 320 grams of natural diatomaceous earth in a beaker, add 3000 mL of distilled water, and stir for 30 minutes. Weigh 1250 g of acrylamide, add 2500 ml of distilled water, and dissolve under stirring. Add diatomaceous earth that has been stirred into a suspension into the acrylamide solution, and then add 1.8 grams of ammonium persulfate. After stirring for 30 minutes, add 2.5 grams of argon diisobutylamidine hydrochloride. The temperature was raised to 90° C. and maintained for 3 hours. The product was dried at 70°C until constant weight, crushed, and passed through a 40-mesh sieve.

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PUM

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Abstract

The invention discloses a heavy metal composite adsorbent and a method for preparing the same. The heavy metal composite adsorbent comprises the following raw materials in portion by mass: 100 portions of acrylamide, 12 to 67 portions of diatomite, 0.05 to 1.8 portions of crosslinking agent, and 0.05 to 1.8 portions of initiator. The adsorbent has a big specific surface area and a good adsorbing property and can be used for removing zinc and copper pollutants in water and regenerated in a solution of diluted acid.

Description

technical field [0001] The invention relates to a heavy metal composite adsorbent and a preparation method thereof. Background technique [0002] With the rapid development of my country's industrial economy and the improvement of urbanization level, the opportunities for heavy metals to enter the environment have increased significantly, causing varying degrees of pollution to soil, water, air, solid waste, food, etc. At the same time, these heavy metals enter the human body through the food chain, seriously threaten human health. Due to the relative stability and refractory nature of heavy metals in the environment, it is difficult to remove them from the environment, making the treatment of heavy metal pollution very difficult. Therefore, heavy metal pollution has become a new difficulty and a new topic in the comprehensive environmental management work. How to control, control and repair heavy metal pollution has become a hot spot of common concern for the government, ex...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/14B01J20/30C02F1/28C02F1/62
Inventor 王爱勤郑易安杨效和
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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