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Method for preparing ammonia-nitrogen adsorbent by using leaves of Magnolia magnolia and application of adsorbent

A technology of adsorbent and Magnolia japonica is applied in the field of water pollution treatment and achieves the effects of low cost, simple process and simple and easy pretreatment.

Inactive Publication Date: 2011-12-21
INST OF SOIL SCI CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Magnolia magnolia is an evergreen tree, which is widely distributed in central and southern China, and the use of its leaves as an adsorbent has not been reported yet.

Method used

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  • Method for preparing ammonia-nitrogen adsorbent by using leaves of Magnolia magnolia and application of adsorbent
  • Method for preparing ammonia-nitrogen adsorbent by using leaves of Magnolia magnolia and application of adsorbent
  • Method for preparing ammonia-nitrogen adsorbent by using leaves of Magnolia magnolia and application of adsorbent

Examples

Experimental program
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Effect test

Embodiment 1

[0015] The leaves of Magnolia magnolia were collected in Nanjing, washed three times with tap water and dried in the shade indoors. Magnolia magnolia leaves were first fixed at 105°C for 15 minutes, and then baked at 70°C for 10 hours to dry. The dried magnolia leaves are mechanically pulverized, and then sieved into 30-100 meshes with a standard sieve. Add the prepared adsorbent at a dose of 4g / L to an aqueous solution containing 25mg / L of ammonia nitrogen, shake at room temperature at 250r / min, and shake for 20 hours. The results show that the removal rate of ammonia nitrogen in this state is 70.4%. Under the same conditions, the removal rates were 77.0%, 83.5%, 84.1% and 83.5% by changing the dosage of adsorbent to 6, 8, 10 and 12 g / L respectively.

[0016] It can be seen that within the dosage of 4-12g / L, the larger the dosage of Magnolia magnolia leaves, the greater the removal rate of ammonia nitrogen in the water body, but if the dosage is too large, the removal rate ...

Embodiment 2

[0018] The leaves of Magnolia magnolia were collected in Nanjing, washed three times with tap water and dried in the shade indoors. Magnolia magnolia leaves were first fixed at 105°C for 15 minutes, and then baked at 70°C for 10 hours to dry. The dried magnolia leaves are mechanically pulverized, and then sieved into 30-100 meshes with a standard sieve. Add the prepared adsorbent at a dosage of 8g / L to an aqueous solution containing 5mg / L of ammonia nitrogen, shake at 250r / min at 15°C, and shake for 20 hours. The results show that the removal rate of ammonia nitrogen in this state is 100%. Under the same conditions, the initial ammonia nitrogen concentration in the solution was changed to 15, 25, 50 and 100 mg / L respectively, and the resulting removal rates were 100%, 85.2%, 44.9% and 23.9%, respectively. Under the same conditions as in the above examples, changing the oscillation temperature to 25°C and 35°C respectively, the ammonia nitrogen removal rates under the five in...

Embodiment 3

[0021] The leaves of Magnolia magnolia were collected in Nanjing, washed three times with tap water and dried in the shade indoors. Magnolia magnolia leaves were first fixed at 105°C for 15 minutes, and then baked at 70°C for 10 hours to dry. The dried magnolia leaves are mechanically pulverized, and then sieved into 30-100 meshes with a standard sieve. Add the prepared adsorbent at a dose of 8g / L to 25mg / L aqueous solution containing ammonia nitrogen, adjust the initial pH of the solution to 2 with 0.1mol / L HCl, shake at room temperature at 250r / min, and shake for 20 Hour. The results show that the removal rate of ammonia nitrogen in this state is 100%. The results show that the removal rate of ammonia nitrogen in this state is 24.3%. Under the same conditions, the initial pH of the solution was adjusted to 3, 4, 5, 6, 7, 8, 9, 10, 11 and 12 with 0.1mol / L HCl or NaOH, and the resulting removal rates were 79.1%, 81.9%, 84.6%, 85.1%, 85.2%, 85.7%, 81.3%, 81.6%, 40.7%, and 2...

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Abstract

The invention discloses an ammonia nitrogen adsorbent prepared by using Magnolia magnolia leaves and an application thereof for removing ammonia nitrogen in water bodies. Magnolia magnolia leaves are used as a raw material, and the raw material is collected, washed, dried, dried, crushed, and sieved to obtain an adsorbent of 30 to 100 meshes. The above adsorbent is mixed with ammonia nitrogen solution in a certain proportion, and shaken on a shaker for 20 hours, which can effectively remove ammonia nitrogen in water. The invention is waste recycling, low raw material cost, simple preparation and adsorption process, and is suitable for treating sewage containing medium and low concentration ammonia nitrogen.

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 Magnolia magnolia leaves and an application of the prepared adsorbent in removing ammonia nitrogen in a water body. Background technique [0002] Important pollutants in water bodies in ammonia nitrogen mainly come from industrial wastewater such as petrochemical, coking, and metallurgy, agricultural wastewater such as animal husbandry, and urban domestic sewage. Excessive ammonia nitrogen entering the water body will promote eutrophication of the water body, cause deterioration of water quality, poison aquatic organisms, and even endanger human health. Therefore, wastewater containing excessive ammonia nitrogen needs to be treated up to the standard before it can be discharged into the environment. The economical and efficient treatment of ammonia nitroge...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24C02F1/28
Inventor 刘海伟董元华刘云王海云
Owner INST OF SOIL SCI CHINESE ACAD OF SCI
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