A biochar adsorbent for highly efficient adsorption of rare earth lanthanum

A biochar and adsorbent technology, applied in the direction of adsorption of water/sewage treatment, water pollutants, and other chemical processes, can solve the problems of high price, inability to prepare on a large scale, poor adsorption effect, etc., and achieve low production costs and raw materials Natural and efficient adsorption effect

Active Publication Date: 2017-10-03
ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Common adsorbents for adsorbing lanthanum include silica, zeolite, resins, biosorbents, and activated carbon. However, these adsorbents are limited in their application due to their poor adsorption effect, high price, or inability to be prepared on a large scale.

Method used

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  • A biochar adsorbent for highly efficient adsorption of rare earth lanthanum
  • A biochar adsorbent for highly efficient adsorption of rare earth lanthanum
  • A biochar adsorbent for highly efficient adsorption of rare earth lanthanum

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A biochar adsorbent for highly efficient adsorption of rare earth lanthanum, the biochar adsorbent is made of the following raw material components mixed and then carbonized according to mass percentage: 75% hijiki, 10% sea wormwood, and 15% sargassum . The specific method of carbonization is as follows: after mixing the raw material components, cracking at 700° C. for 3 hours in an oxygen-free environment, and cooling naturally.

[0023] The biochar adsorbent becomes a finished product after being treated with a dilute alkali solution. The specific treatment of the dilute alkali solution is: place the biochar adsorbent in a sodium hydroxide solution with a concentration of 0.3mol / L, heat it to 45°C, soak it for 5 hours, and take it out. Finally, rinse with distilled water, dry at 80°C for 24 hours, crush and pass through a 60-mesh sieve.

Embodiment 2

[0025] A biochar adsorbent for efficiently adsorbing rare earth lanthanum, the biochar adsorbent is made of the following raw material components mixed and then carbonized according to mass percentage: 90% hijiki, 5% sea wormwood, and 5% sargassum . The specific method of carbonization is as follows: after mixing the raw material components, cracking at 700° C. for 3 hours in an oxygen-free environment, and cooling naturally.

[0026] The biochar adsorbent becomes a finished product after being treated with a dilute alkali solution. The specific treatment of the dilute alkali solution is: place the biochar adsorbent in a sodium hydroxide solution with a concentration of 0.5mol / L, heat it to 35°C, soak it for 8 hours, and take it out Finally, rinse with distilled water, dry at 80°C for 24 hours, crush and pass through a 60-mesh sieve.

Embodiment 3

[0028] A biochar adsorbent for highly efficient adsorption of rare earth lanthanum, the biochar adsorbent is made of the following raw material components mixed and carbonized according to mass percentage: 80% hijiki, 8% sea wormwood, and 12% sargassum . The specific method of carbonization is as follows: after mixing the raw material components, cracking at 700° C. for 3 hours in an oxygen-free environment, and cooling naturally.

[0029] The biochar adsorbent becomes a finished product after being treated with a dilute alkali solution. The specific treatment of the dilute alkali solution is: place the biochar adsorbent in a sodium hydroxide solution with a concentration of 0.4mol / L, heat it to 40°C, soak it for 6 hours, and take it out. Finally, rinse with distilled water, dry at 80°C for 24 hours, crush and pass through a 60-mesh sieve.

[0030] Product performance test research:

[0031] 1. Method

[0032] 1.1 Preparation of biochar adsorbents at different pyrolysis tem...

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Abstract

The invention discloses a biochar adsorbent for efficiently adsorbing a rare earth lanthanum element. The biochar adsorbent is prepared by mixing the following raw material components in percentage by weight: 75 to 90 percent of sargassum fusiforme, 5 to 10 percent of sargassum pallidum and 5 to 15 percent of sargassum thunbergii and then carbonizing. According to the biochar adsorbent disclosed by the invention, raw materials are natural, environment-friendly, and widely exist in a natural environment; the biochar adsorbent can be used for efficiently adsorbing lanthanum and effectively removing the lanthanum element as a rare earth element, and is low in cost.

Description

technical field [0001] The invention relates to a biochar adsorbent, in particular to a biochar adsorbent for efficiently adsorbing rare earth lanthanum. Background technique [0002] Rare earth elements are known as the treasure house of new materials. In the transformation of traditional industries and the development of high-tech fields, rare earth elements have the function of "turning stones into gold", and are especially regarded as the "vitamins" of the information age. At present, rare earths have been widely used in dozens of industries such as petroleum, chemical industry, metallurgy, and medicine, and low doses of rare earths have a good effect on increasing crop production, making rare earths widely used in agriculture. However, with the continuous increase in the use and amount of rare earth elements, the content of rare earth elements (especially lanthanide elements) in the environment is getting higher and higher, and cause certain harm. Therefore, the effecti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20C02F1/28C02F101/20
CPCB01J20/041B01J20/20B01J2220/4843B01J2220/485C02F1/281C02F2101/20
Inventor 汪玉瑛杨生茂吕豪豪刘玉学钟哲科
Owner ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES
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