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Simple method for preparing compound adsorbing material by straws and coal gangues together

A technology of composite adsorption material and coal gangue is applied in the field of resource utilization of solid waste, which can solve the problems of polluting the surrounding environment, encroaching on land and farmland, destroying land resources, etc. Effect

Inactive Publication Date: 2015-01-21
ANHUI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The piled coal gangue not only seriously pollutes the surrounding environment, but also invades a large amount of land and farmland, causing serious damage to land resources.

Method used

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  • Simple method for preparing compound adsorbing material by straws and coal gangues together
  • Simple method for preparing compound adsorbing material by straws and coal gangues together
  • Simple method for preparing compound adsorbing material by straws and coal gangues together

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Select crop straw and coal gangue as raw materials, first obtain powdery materials with a certain particle size range through drying, crushing and screening respectively (the size of straw and coal gangue are both 250um); then according to the mixing mass ratio of straw and coal gangue is 60 :40 the two are uniformly mixed, put into a crucible and compacted, and carry out calcining treatment in a muffle furnace (the treatment system is to heat up at a heating rate of 12°C / min, to be kept at 600°C for 40min, and at 850°C for 60min), namely Obtain the finished composite adsorbent material.

[0021] The composite adsorption material prepared in this example was tested for adsorption performance. Under the condition of magnetic stirring, 25 mg of composite adsorbent material was added into methylene blue solution (50 mL, 0.03 g / L), stirred for 15 min, centrifuged and filtered, and the supernatant was taken for absorbance test. Utilize the ultraviolet-visible spectrophotome...

Embodiment 2

[0023] Select crop straw and coal gangue as raw materials, first obtain powdery materials with a certain particle size range (the size of straw is 250um, and the size of coal gangue is 75um) through drying, crushing, and screening respectively; then according to the mixing mass ratio of straw and coal gangue Mix the two evenly at a ratio of 90:10, put them into a crucible and compact them, and perform calcination in a muffle furnace (the treatment system is to heat up at a heating rate of 15°C / min, keep at 500°C for 35min, and hold at 800°C for 70min) , that is, the finished composite adsorbent material is obtained. The absorbance of the composite adsorption material prepared in this example is 2.688 before being used to treat the methylene blue solution, and the absorbance of the methylene blue solution after being treated is 0.041.

Embodiment 3

[0025] Select crop straw and coal gangue as raw materials, first obtain powdery materials with a certain particle size range (the size of straw is 150um, and the size of coal gangue is 75um) through drying, crushing, and screening respectively; then according to the mixing mass ratio of straw and coal gangue Mix the two evenly at a ratio of 75:25, put them into a crucible and compact them, and perform calcination in a muffle furnace (the treatment system is to heat up at a heating rate of 15°C / min, keep at 500°C for 30min, and hold at 815°C for 60min) , that is, the finished composite adsorbent material is obtained.

[0026] The absorbance of the composite adsorption material prepared in this example is 2.688 before being used to treat the methylene blue solution, and the absorbance of the methylene blue solution after being treated is 0.033.

[0027] The microscopic morphology of the composite adsorbent material prepared in Example 3 of the present invention is as follows: f...

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Abstract

The invention discloses a simple method for preparing a compound adsorbing material by straws and coal gangues together. The simple method is characterized by comprising the following steps: using the crop straws and the coal gangues as raw materials, firstly obtaining powdery material with a certain particle size range through drying, crushing and screening respectively, then uniformly mixing the crop straws and the coal gangues according to certain proportion, putting the mixture into a crucible, compacting, and conducting calcination processing in a muffle furnace so as to obtain the compound adsorbing material finished product. According to the invention, the comprehensive utilization field of the crop straws and the coal gangues is expanded, the preparation process is simple, complex operation is not related, the cost is low, the effect of the simple method when being applied to the field of sewage purification is obvious, and the adsorption performance is excellent.

Description

technical field [0001] The invention belongs to the field of resource utilization of solid waste, and in particular relates to a method for preparing a composite adsorption material by co-preparing straw and coal gangue. Background technique [0002] As a large agricultural country, my country's annual output of crop straw can reach more than 700 million tons. Because the comprehensive development and utilization technology of straw is not mature enough, the investment is large, and the utilization rate is low, a large amount of straw is mainly disposed of by incineration technology. A large amount of dense smoke produced by straw burning in the fields during the harvest season has become a technical bottleneck that is difficult to control in rural environmental pollution. Therefore, it is the key to solve the problem to expand the straw resource utilization technology and effectively improve the recycling rate. [0003] With the continuous increase of my country's coal pr...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30
CPCB01J20/0229B01J20/041B01J20/06B01J20/08B01J20/103B01J20/165B01J20/20C02F1/281C02F1/283C02F1/288C02F2101/308C02F2101/20B01J2220/4875B09B3/20B09B3/40
Inventor 徐初阳王艳芬章龙胜周欢欢程详侯斗吴晓飞袁飞
Owner ANHUI UNIV OF SCI & TECH
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