Modified compound kieselguhr adsorbing agent for treating industrial wastewater and preparation method

A technology for industrial wastewater and adsorbents, applied in chemical instruments and methods, adsorbed water/sewage treatment, alkali metal compounds, etc., can solve problems such as poor performance and limited treatment effect of a single diatomite adsorbent, and achieve strong adsorption capacity , good processing effect

Active Publication Date: 2015-12-16
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for industrial wastewater with high concentration and complex components such as pharmaceuticals and oil production, the unmodified single diatomite adsorbent has limited or poor treatment effect

Method used

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  • Modified compound kieselguhr adsorbing agent for treating industrial wastewater and preparation method
  • Modified compound kieselguhr adsorbing agent for treating industrial wastewater and preparation method
  • Modified compound kieselguhr adsorbing agent for treating industrial wastewater and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 500g of diatom concentrate obtained from Beifeng Diatomite Co., Ltd., Linjiang City, Jilin Province after beneficiation, was calcined in a laboratory rotary tube furnace at 450°C for 1.5h; Stir evenly in a three-neck flask in the laboratory and heat it in a water bath. After the temperature of the slurry rises to 75°C, add 2.0g of hexadecyltrimethylammonium bromide, heat-preserve and modify at 70-80°C for 1.5h, then filter, Washing, and drying the washed filter cake in a drying oven at 105°C to obtain modified diatomite.

[0026] Take 65 g of the above-mentioned modified diatomite, 30 g of attapulgite, and 5 g of magnesium-silicon slag extracted from serpentine and mix them uniformly in a laboratory stirrer to obtain a modified composite diatomite adsorbent.

[0027] Take DESMP (diethyl p-toluenesulfonyloxymethyl phosphate) production wastewater 1000mL. The wastewater has complex components, high organic content and a certain amount of inorganic salt, and the chemical ...

Embodiment 2

[0030] Take 70 g of modified diatomite prepared in Example 1, 5 g of attapulgite, and 25 g of serpentine-extracted magnesium-silicon slag and mix them uniformly in a laboratory mixer to obtain a modified composite diatomite adsorbent.

[0031] Take 1000mL of wastewater discharged from an oilfield in the north, the COD of the wastewater is 1.92mg / L, and the pH value is 6-7.

[0032] Add 7g of modified composite diatomaceous earth adsorbent to the above 1000mL wastewater, and stir at 30°C for 1.5h. The COD of the treated water sample is 36.85mg / L, and the COD removal rate is 84.77%.

Embodiment 3

[0034] 500g of diatom concentrate obtained from Beifeng Diatomite Co., Ltd., Linjiang City, Jilin Province after beneficiation, was calcined in a laboratory rotary tube furnace at 450°C for 1.5h; Stir evenly in a three-neck flask in the laboratory and heat it in a water bath. After the pulp temperature rises to 75°C, add 4.0g of hexadecyltrimethylammonium bromide, heat-preserve and modify at 70-80°C for 1.5h, then filter, Washing, and drying the washed filter cake in a drying oven at 105°C to obtain modified diatomite.

[0035] Take 60 g of the above-mentioned modified diatomite, 33 g of attapulgite, and 7 g of magnesium-silicon slag extracted from serpentine and mix them uniformly in a laboratory mixer to obtain a modified composite diatomite adsorbent.

[0036] Get 1000 mL of DESMP (diethyl p-toluenesulfonyloxymethyl phosphate) production wastewater whose components, COD and pH are the same as in Example 1.

[0037]Add 200 g of modified composite diatomite adsorbent to the ...

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Abstract

The invention relates to a modified compound kieselguhr adsorbing agent for treating industrial wastewater and a preparation method. According to the technical scheme provided by the invention, the method comprises the following steps: firstly, modifying a diatomite subjected to ore-dressing purification and calcinations by using an organic quaternary ammonium salt, and then uniformly mixing the modified diatomite, attapulgite and de-magnesium silicon residues of serpentine at mass percentage of (60%-75%):(5%-35%):(5%-35%), thereby preparing the modified compound kieselguhr adsorbing agent. In the modified compound kieselguhr adsorbing agent, three porous mineral materials, namely, the diatomite modified by quaternary ammonium salt, the attapulgite and de-magnesium silicon residues of serpentine can give play to individual strengths, can collaboratively match one another and can selectively absorb the organic and inorganic pollutants in different types and molecular dimensions. The modified compound kieselguhr adsorbing agent is fit for treating the industrial wastewater in complex pollutant components and higher concentration.

Description

technical field [0001] The invention relates to a modified composite diatomite adsorbent for treating industrial wastewater and a preparation method thereof, belonging to the technical fields of non-metallic mineral materials and applications and industrial wastewater treatment. Background technique [0002] Pharmaceutical, chemical, oil extraction and other industrial wastewater contains a large amount of organic and inorganic components. These industrial wastewater are directly discharged into rivers and lakes without treatment, which not only causes serious pollution to the water environment and soil, but also endangers human health and sustainable economic and social development. . Among them, the toxic and harmful organic and inorganic pollutants in the pharmaceutical industry wastewater are extremely high, which is particularly harmful to the living environment and health of human beings. [0003] Pharmaceutical industry wastewater mainly refers to the wastewater disc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/14B01J20/28B01J20/30C02F1/28
Inventor 郑水林孙志明吴翠平
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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