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Preparation method of material for adsorption of non-biodegradable organic pollutant

An organic pollutant, refractory technology, applied in the field of environmental pollution control, can solve the problems of COD reduction effect, high equipment cost, long decolorization cycle, etc., and achieve the effect of simple process, good effect and easy availability of raw materials

Active Publication Date: 2014-03-05
上海绿帝环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Advanced oxidation technology includes wet oxidation method, Fenton reagent method and photocatalytic oxidation method, etc., which have good decolorization ability, but the cost is high, and the COD reduction effect is not good
Electrochemical technology to treat wastewater has multiple functions such as redox, coagulation, sterilization and adsorption, but the complete oxidation and decomposition of organic pollutants in water requires high energy consumption and high equipment costs.
The use of microbial methods to adsorb organic matter has been gradually developed in recent years. This method has the advantages of no waste and complete utilization, but the decolorization cycle is long and has certain requirements for the environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The first step, the selection and preparation of raw materials

[0028] Select commercially available industrial-grade magnesium chloride or magnesium nitrate, add water to it, and prepare a solution with a concentration of 10% by weight, which is referred to as solution A;

[0029] Select commercially available industrial-grade aluminum nitrate or aluminum sulfate, add water to it, and prepare a solution with a concentration of 20% by weight, which is referred to as solution B;

[0030] Select commercially available industrial-grade sodium dodecylbenzenesulfonate, add water to it, and prepare a solution with a concentration of 1% by weight, which is referred to as solution C;

[0031] Select commercially available nano-iron as raw material, the nano-iron is iron powder with a particle size of 20nm, add water to the nano-iron to prepare a solution with a concentration of 1% by weight, referred to as solution D;

[0032] Add water to commercially available industrial gr...

Embodiment 2

[0037] Adsorption treatment of dye wastewater: Take 1000ml of methylene blue wastewater from a synthetic dye factory in a beaker, add 100ml of the liquid material with a blue appearance and a content of 5% prepared in Example 1, stir for 20 minutes, and stick to the bottom of the beaker Place a magnet block with a diameter of 20 cm and let it stand for 30 minutes. The test results show that the chroma in the raw wastewater is 24500 degrees, the chroma in the clarified liquid after adsorption treatment is 30 degrees, and the removal rate is 99.9%. Therefore, the material has an excellent treatment effect on dye wastewater.

[0038] The residue is calcined at 500 degrees for 2 hours to decompose the adsorbed organic matter, and it can still be adsorbed by a magnet after being pulverized into powder, and can be used as a magnetic adsorbent for heavy metals.

Embodiment 3

[0040]Adsorption treatment of pesticide wastewater: Take 1000ml of phoxim wastewater from a pesticide factory in a beaker, add 60ml of the liquid material with a blue appearance and a content of 5% prepared in Example 1, stir for 20 minutes, and place it on the bottom of the beaker A magnet block with a diameter of 20 cm was left to stand for 20 minutes. The test results show that the concentration of phoxim in the raw wastewater is 120mg / l, and the concentration of phoxim in the clarified liquid after adsorption treatment is 15mg / l, with a removal rate of 87.5%. Therefore, the material has a good treatment effect on hydrophobic organic waste water.

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PUM

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Abstract

The invention relates to a preparation method of a material for adsorption of non-biodegradable organic pollutants. Nano-iron, magnesium salt, aluminum salt and caustic soda are used as inorganic reactants, and an anionic surfactant is used as a functional agent. The anionic surfactant and the nano-iron are well mixed, the mixture is added into mixed solution of the caustic soda and the aluminum salt, mixture is well mixed, the magnesium salt solution is added slowly, and the solution is mixed for 10-30 minutes, kept static for more than 12 hours and separated to obtain a blue precipitate, i.e. the material for adsorption of dyes, persistent organic materials and other non-biodegradable organic pollutants. The material is added into organic wastewater at 0.1-1 percent and has good adsorption properties and magnetic separation properties. The preparation method has the advantages that raw materials can be obtained easily, the process is simple, the cost is low, a large number of dyes or hydrophobic organic materials can be absorbed by the product and good effects of magnetic separation can be achieved. Therefore, the preparation method can be applied in adsorption of organic industrial wastewater.

Description

technical field [0001] The invention relates to a preparation method of a material for adsorbing refractory organic pollutants, in particular to a production process of an adsorption material for treating organic waste water. It belongs to the field of environmental pollution control. Background technique [0002] A large amount of waste water is discharged into the environment during the production of dyes, medicines, pesticides, and chemicals. High concentrations of organic matter, especially persistent organic pollutants, have brought serious disasters to humans and the ecological environment. For example, more than 10,000 dyes have been produced commercially, with 5%-10% of the amount used being discharged into the aquatic environment. Most of the dye molecules contain aromatic groups, which are resistant to light, heat, and oxidation. Some dyes can cause allergies, dermatitis, redness and swelling of the skin, and even induce cancer and gene mutations. Therefore, orga...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/02B01J20/28B01J20/30C02F1/28
Inventor 郜子蕙郜子涵
Owner 上海绿帝环保科技有限公司