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Preparation method of modified sludge activated carbon heavy metal absorbing material

A technology of sludge activated carbon and adsorption materials, which is applied in the direction of non-metal elements, alkali metal compounds, chemical instruments and methods, etc., can solve problems such as not suitable for large-scale application, damage to the ecological environment, and large corrosion of equipment, so as to achieve recycling Utilization and resource utilization, expanding the scope of use, and the effect of high-efficiency adsorption

Active Publication Date: 2019-03-19
NEW MATERIAL INST OF SHANDONG ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the preparation methods of sludge-based activated carbon mainly include chemical activation method, physical activation method, and physical chemical method, but the chemical activation method often uses zinc chloride, sulfuric acid, potassium hydroxide, etc., which not only corrodes the equipment but also damages the ecological environment. , the scope of application is narrow, and the yield of physical activation method is low, which is not suitable for large-scale application. At present, there are few studies on physical and chemical methods.
[0003] The phosphoric acid activation method is one of the chemical activation methods, which has the advantages of less pollution, low carbonization temperature, and low cost. However, the performance of the sludge activated carbon prepared by the phosphoric acid activation method is not high, which leads to a narrow application range.

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A preparation method of modified sludge activated carbon heavy metal adsorption material is characterized in that the preparation method is as follows:

[0022] (1) Phosphoric acid activation treatment: the sludge is dried, ground, and passed through an 80-mesh sieve to obtain sludge granules. Phosphoric acid is added to the sludge granules and stirred. The liquid-solid ratio of phosphoric acid and sludge is 3:1, and the phosphoric acid concentration 40%, stand still for 36 hours, take the standstill sludge and carry out microwave treatment: under the protection of nitrogen atmosphere, adjust the microwave power to 300W, the temperature is 280 ℃, the carbonization time is 90 minutes, then adjust the microwave power to 800W, The temperature is 750°C, the carbonization time is 100 minutes, and then the above microwave treatment steps are repeated once to complete the microwave treatment; then the deionized water is used to wash until neutral, and then dry to obtain activat...

Embodiment 2

[0030] A preparation method of modified sludge activated carbon heavy metal adsorption material is characterized in that the preparation method is as follows:

[0031] (1) Phosphoric acid activation treatment: the sludge is dried, ground, and passed through an 80-mesh sieve to obtain sludge granules. Phosphoric acid is added to the sludge granules and stirred. The liquid-solid ratio of phosphoric acid and sludge is 2:1, and the phosphoric acid concentration 40%, stand still for 24 hours, take the standstill sludge and carry out microwave treatment: under the protection of nitrogen atmosphere, adjust the microwave power to 220W, the temperature is 210°C, the carbonization time is 70 minutes, then adjust the microwave power to 1500W, The temperature is 600°C, the carbonization time is 90 minutes, and then the above microwave treatment steps are repeated once to complete the microwave treatment; then the deionized water is used to wash until neutral, and then dry to obtain activat...

Embodiment 3

[0040] A preparation method of modified sludge activated carbon heavy metal adsorption material is characterized in that the preparation method is as follows:

[0041](1) Phosphoric acid activation treatment: the sludge is dried, ground, and passed through an 80-mesh sieve to obtain sludge granules. Phosphoric acid is added to the sludge granules and stirred. The liquid-solid ratio of phosphoric acid and sludge is 3:1, and the phosphoric acid concentration 40%, let it stand still for 30 hours, take the standstill sludge and carry out microwave treatment: under the protection of nitrogen atmosphere, adjust the microwave power to 300W, the temperature is 250°C, the carbonization time is 80 minutes, then adjust the microwave power to 1600W, The temperature is 800°C, the carbonization time is 120 minutes, and then the above microwave treatment steps are repeated once to complete the microwave treatment; then the deionized water is used to wash until neutral, and then dry to obtain ...

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Abstract

The invention relates to the field of heavy metal absorption, particularly to a preparation method of a modified sludge activated carbon heavy metal absorbing material. The preparation method of the modified sludge activated carbon heavy metal absorbing material mainly comprises phosphoric acid activation treatment, activation treatment and modification treatment. The prepared modified sludge activated carbon heavy metal absorbing material is stable in performance and good in regenerability and achieves recycled and resource utilization of bottom mud.

Description

technical field [0001] The invention belongs to the field of heavy metal adsorption, in particular to a method for preparing a modified sludge activated carbon heavy metal adsorption material. Background technique [0002] At present, the effective treatment methods for municipal sludge mainly include landfill, incineration, throwing into the sea and agricultural use, and landfilling, incineration and throwing into the sea will bring about environmental pollution again to varying degrees. Preparation of activated carbon from surplus sludge is one of the effective ways to realize resource utilization of sludge. At present, the preparation methods of sludge-based activated carbon mainly include chemical activation method, physical activation method, and physical chemical method, but the chemical activation method often uses zinc chloride, sulfuric acid, potassium hydroxide, etc., which not only corrodes the equipment but also damages the ecological environment. , the scope of...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/28B01J20/30B01J20/32C02F1/28C01B32/324C01B32/336C01B32/342C01B32/354C02F101/20
CPCB01J20/20B01J20/28064B01J20/28078B01J20/3078B01J20/3085B01J20/3231B01J2220/4887C02F1/288C02F2101/20C01B32/324C01B32/336C01B32/342C01B32/354
Inventor 韩哲单然然何媛邵艳秋刘秀玉朱英
Owner NEW MATERIAL INST OF SHANDONG ACADEMY OF SCI