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Method for preparing ammonia nitrogen adsorbent by using banana peel and application of ammonia nitrogen adsorbent

An adsorbent and banana peel technology, which is applied in the field of water pollution treatment, can solve the problems of limited ammonia nitrogen adsorption capacity, low output, and high energy consumption, and achieve the effects of short adsorption time, high output, and low energy consumption

Inactive Publication Date: 2013-09-04
CHONGQING THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional method of producing adsorbents from fruit peels is to carbonize them at high temperatures to make activated carbon, which consumes a lot of energy, and because of the high-temperature carbonization process, due to volatilization and gasification, its yield is often low. The adsorption capacity of activated carbon for ammonia nitrogen is also quite limited.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The preparation of embodiment 1 ammonia nitrogen adsorbent

[0020] Collect ripe banana peels, wash them, heat and dry them at 100-110°C, crush the dried banana peels to 20-60 mesh particles, and place the crushed banana peels in a 0.05mol / L Soak and modify in NaOH solution for 20 minutes, with stirring, wherein the ratio of the mass of banana peel to the volume of NaOH solution is 1g: 10mL, then filter, take the filter residue and wash it with ammonia-free water, then filter, repeat washing until the washing water is nearly colorless, It can be dried at room temperature, and the yield of ammonia nitrogen adsorbent is 12.71%;

[0021] Or collect ripe banana peels, wash them, heat and dry them at 100-110°C, crush the dried banana peels to 20-60 mesh particles, and place the crushed banana peels in 0.1mol / L Soak and modify in NaOH solution for 30 minutes, with stirring, wherein the ratio of the mass of banana peel to the volume of NaOH solution is 2g: 10mL, then filter, ...

Embodiment 2

[0025] Embodiment 2 The influence of the particle size of the ammonia nitrogen adsorbent on the adsorption performance of the adsorbent

[0026] The ammonia nitrogen adsorbent prepared in Example 1 was crushed into a particle size of 60-80 mesh; then 0.1 g of the adsorbent was put into 25 mL of ammonia nitrogen aqueous solution containing 10 mg / L of ammonia nitrogen; NaOH solution adjusted the pH of the ammonia nitrogen solution to 7, stirred for 15 minutes, and the removal rate of ammonia nitrogen was 64.13%. Under the same conditions, changing the particle size of the adsorbent to 100-120 mesh, 140-160 mesh, and 180-200 mesh respectively, the removal rates of ammonia nitrogen obtained were 64.54%, 64.98%, and 65.17%, respectively.

[0027] It can be seen that, when the particle size of the adsorbent is within 60-200 mesh, the removal rate of ammonia nitrogen increases slightly due to the decrease of the particle size of the adsorbent, but the increase is not obvious.

Embodiment 3

[0028] Embodiment 3 The influence of the amount of ammonia nitrogen adsorbent on the adsorption performance of adsorbent

[0029] The ammonia nitrogen adsorbent prepared in Example 1 was crushed into a particle size of 100-120 mesh; then 0.1 g of the adsorbent was put into 25 mL of ammonia nitrogen aqueous solution containing 20 mg / L of ammonia nitrogen; NaOH solution adjusted the pH of the ammonia nitrogen aqueous solution to 7, stirred for 15 minutes, and the removal rate of ammonia nitrogen was 56.85%. Under the same conditions, changing the dosage of adsorbent to 0.2g, 0.3g, 0.4g, 0.5g respectively, the removal rates of ammonia nitrogen were 71.33%, 76.75%, 78.24%, 79.11%.

[0030] It can be seen that, within the range of 0.1-0.5g︰25mL, the removal rate of ammonia nitrogen increases with the increase of the volume ratio of the adsorbent mass to the ammonia nitrogen aqueous solution. When the volume ratio exceeds 0.4g︰25mL, the removal rate of ammonia nitrogen will not inc...

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Abstract

The invention discloses a method for preparing an ammonia nitrogen adsorbent by using a banana peel. According to the method, the ammonia nitrogen adsorbent can be prepared by dehydration, crushing, soaking and scrubbing. Compared with the common method using peels and shells to prepare an activated carbon adsorbent through heating at high temperature, the method disclosed by the invention is simple and feasible in operation and has no need of heating, low energy consumption and high yield. The invention also provides an application of the ammonia nitrogen adsorbent prepared by using the method disclosed by the invention. The ammonia nitrogen adsorbent product prepared by the method for preparing the ammonia nitrogen adsorbent by using the banana peel disclosed by the invention has good adsorption effect on the ammonia nitrogen in 10-150mg / L of ammonia nitrogen aqueous solution, the time for reaching adsorption balance is short, the adsorptive property is stable, and the ammonia nitrogen adsorbent can be used for adsorption treatment of nitrogenous waste water. Meanwhile, the method disclosed by the invention also can realize the reclamation of the banana peels.

Description

technical field [0001] The invention belongs to the water pollution treatment technology in the field of environmental protection, and in particular relates to a method for preparing an ammonia nitrogen adsorbent by using banana peels and an application of the prepared ammonia nitrogen adsorbent in removing ammonia nitrogen in an ammonia nitrogen aqueous solution. Background technique [0002] In recent years, most of my country's water bodies are facing the threat of eutrophication. The reason is due to the excessive discharge of N and P. Therefore, ammonia nitrogen, as a strictly controlled discharge index, is an important reference index for the treatment performance of various sewage treatment plants and sewage treatment facilities. At present, for the removal of ammonia nitrogen, there are mainly biological methods and physical chemical methods. The biological method is mainly used in large-scale sewage treatment plants and is the mainstream treatment method. It has str...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28
Inventor 平巍李廷真付川何立平冉谷董建丰程瑶焦耀伦
Owner CHONGQING THREE GORGES UNIV
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