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Preparation of palygorskite clay/plant stalk composite adsorbent and application of composite adsorbent in treating printing and dyeing wastewater

A technology of palygorskite clay and plant straw, applied in the direction of adsorption of water/sewage treatment, other chemical processes, chemical instruments and methods, etc., can solve the problems of secondary pollution of adsorbents, air pollution, poor effect, etc., and achieve enhanced adsorption capacity and adsorption speed, improving purification capacity and efficiency, and saving resources

Inactive Publication Date: 2012-08-01
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above types of materials have the following problems: the adsorbents prepared by methods such as surfactant modification and loading of organic matter have secondary pollution problems, and cannot be used in water purification industries with stricter requirements; using glucose and other resources for hydrothermal carbonization reactions, although The above problems are avoided, but the cost of sewage treatment agents is increased, which is precisely the most confusing problem in the sewage treatment industry
[0005] Although Chinese patent CN 101990987 A mentions an example of using straw and palygorskite to treat potato starch wastewater, this patent does not prepare straw and clay into composite materials, but uses them separately, which does not have the synergistic effect of straw and clay. It is just a simple physical combination, although it can purify wastewater, but the effect is poor
Luoyang Institute of Technology completed the scientific and technological achievement "Development of waste water purifiers containing heavy metal ions by using attapulgite modified with corn stalks". The atmosphere brings pollution, and the adsorbent is only used for the adsorption of metal ions, and no statement is made about printing and dyeing wastewater

Method used

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  • Preparation of palygorskite clay/plant stalk composite adsorbent and application of composite adsorbent in treating printing and dyeing wastewater
  • Preparation of palygorskite clay/plant stalk composite adsorbent and application of composite adsorbent in treating printing and dyeing wastewater
  • Preparation of palygorskite clay/plant stalk composite adsorbent and application of composite adsorbent in treating printing and dyeing wastewater

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Experimental program
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Effect test

Embodiment 1

[0030] Preparation of adsorbent: crush palygorskite clay raw ore and waste plant straw to 100-300 mesh respectively, add them to the rotary autoclave at a mass ratio of 1:0.5 after drying, and use distilled water to prepare a total mass concentration of 10% The solution was stirred and hydrothermally reacted at 100°C for 1 h, cooled, filtered, and dried to obtain palygorskite clay / plant straw composite adsorbent.

[0031] Adsorption performance test: the methylene blue was formulated into a 350mg / L solution, and the adsorption test was carried out by using the composite adsorbent prepared by the present invention. Test conditions: solid-liquid ratio 30, temperature: 10°C, pH value 9, adsorption time 1.5h, adsorption rate 99%.

Embodiment 2

[0033]Preparation of adsorbent: crush palygorskite clay raw ore and waste plant straw to 100-300 mesh respectively, add them to the rotary autoclave at a mass ratio of 1:1 after drying, and use distilled water to prepare a total mass concentration of 10% The solution was stirred and hydrothermally reacted at 110°C for 1.5h, cooled, filtered, and dried to obtain palygorskite clay / plant straw composite adsorbent.

[0034] Adsorption performance test: Methyl orange was formulated into a 200mg / L solution, and the adsorption test was carried out by using the composite adsorbent prepared by the present invention. Test conditions: solid-liquid ratio 6, temperature: 10°C, pH value 3, adsorption time 0.1h, adsorption rate 98%.

Embodiment 3

[0036] Preparation of adsorbent: crush palygorskite clay raw ore and waste plant straw to 100-300 mesh respectively, add them to the rotary autoclave at a mass ratio of 1:1.5 after drying, and use distilled water to prepare a total mass concentration of 20% The solution was stirred and hydrothermally reacted at 120°C for 2 hours, cooled, filtered, and dried to obtain palygorskite clay / plant straw composite adsorbent.

[0037] Adsorption performance test: the methylene blue was formulated into a 200mg / L solution, and the adsorption test was carried out by using the composite adsorbent prepared by the present invention. Test conditions: solid-liquid ratio 18, temperature: 20°C, pH value 7, adsorption time 2.0h, adsorption rate 99%.

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Abstract

The invention provides preparation of a palygorskite clay / plant stalk composite adsorbent, and belongs to the technical field of the composite material. The preparation of the palygorskite clay / plant stalk composite adsorbent provided by the invention adopts raw palygorskite ores and plant stalks as raw materials. The palygorskite clay / plant stalk composite adsorbent is prepared by carrying out hydrothermal reaction on the raw palygorskite ores and the plant stalks. The collaborative adsorption capacity of the raw palygorskite clay and plant stalk is completely utilized to greatly enhance theadsorption capacity and the adsorption speed of the adsorbent, and the cost is reduced. Though the tests, the composite adsorbent prepared by the preparation method provided by the invention has favorable purifying capacity (82%-99%) to the printing and dyeing wastewater and favorable efficiency (purification is accomplished within 0.1-2 hours), thereby being a relatively ideal sewage treating agent.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and relates to the preparation of a palygorskite clay / plant straw composite adsorbent; the invention also relates to the application of the composite adsorbent in treating printing and dyeing wastewater. Background technique [0002] Palygorskite clay is a characteristic resource in my country, and its reserves rank first in the world. Palygorskite clay has many special properties, among which adsorption is one of the most important properties of palygorskite clay. Due to the different mineralization reasons of palygorskite clay, the properties and uses of palygorskite clay in different regions are very different. Palygorskite clay mines can be divided into good quality and bad quality. Generally, palygorskite ore with poor quality is not suitable for fine chemical industry, but it does have good adsorption capacity for sewage. [0003] Plant straw is a waste natural resource in ru...

Claims

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Application Information

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IPC IPC(8): B01J20/30B01J20/12C02F1/28
Inventor 于静姝杨翠玲张哲高淑玲崇雅丽李芳红杨志旺雷自强
Owner NORTHWEST NORMAL UNIVERSITY
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