Preparation method of porous adsorbent

A porous adsorbent and roasting technology, applied in chemical instruments and methods, adsorption water/sewage treatment, alkali metal oxides/hydroxides, etc., can solve the problems of weak adsorption capacity, complicated process, low stability, etc. Achieve the effect of easy regeneration, simple treatment method and strong adsorption performance

Inactive Publication Date: 2022-03-29
HUNAN INSTITUTE OF SCIENCE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] From the design of the surface structure of most adsorbents, it mainly relies on the natural surface of the adsorbed substance and the interstitial pores accumulated between the particles, the adsorption capacity is relatively weak, and there are deficiencies in the process such as complicated procedures, low stability or poor strength.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1, preparation of the adsorbent

[0026] (1) 105.6 g kaolin, 121.3 g of the sea bubble, 131.4 g of the bentonite is mixed, and the particle size of each clay material is 160-200 mesh, and the mixture is taken at 700 ° C for 1 h, and the calcination component is obtained;

[0027] (2) Take the baked component of the baked group in step 1) to 045 mL, 15% of the potassium hydroxide solution, warmed to 90 ° C, reaction 2 h, filtered, washed with 600 mL, wash the reactant, wash liquid Mixed filtrate with the mother liquor;

[0028] (3) The filtrate obtained by step 2) was added to the 90 g / L aluminum sulfate solution, and the adjustment system pH was 8.0 to obtain a gel substance;

[0029] (4) The water washing reaction obtained by step 2), step 3) obtained the gel substance, 5 g of the field, 2 g of vermiculum, and mixed together;

[0030] (5) The mixture obtained by step 4) was dried at 120 ° C for 8 h to obtain a porous adsorbent, and the water was divided into 9.1%, and th...

Embodiment 2

[0034] 1, preparation of the adsorbent

[0035] (1) Handle 164.3 g kaolin, 75.8 g of diatomaceous earth is mixed uniform, and the pulverized to a particle size is 160-200 mesh, and 10 h is checked at 400 ° C, and the calcination component is obtained;

[0036] (2) In step 1), the baked component is 150 g to 1000 m, 30% sodium hydroxide solution, warmed to 65 ° C, reaction 8 h, filtered, washed with 300 mL, wash the reactants, wash the liquid Mixed filtrate with the mother liquor;

[0037] (3) The filtrate obtained by step 2) was added to the 70 g / L chloride solution, and the adjustment system was 9.5 to obtain a gel substance;

[0038] (4) The water wash substance obtained by step 2), and the gel material obtained, and 22 g of starch is added together, and the mix is ​​uniform;

[0039] (5) The mixture obtained by step 4) was dried at 150 ° C for 6 h to obtain a porous adsorbent, and the water was divided into 8.7%, and the particle diameter was 160-200 mesh.

[0040] 2, adsorpt...

Embodiment 3

[0043] 1, preparation of the adsorbent

[0044] (1) Handle 59 g kaolin, 40 g of iris soil is mixed, pulverized to a particle size of 160-200 mesh, carried out at 600 ° C for 4 h, and calcinate component;

[0045](2) In step 1), 83 mL, 29% sodium silicate solution was added to 80 g, and the temperature was raised to 80 ° C, reacted 4 h, filtered, washed with 80 mL, wash the reactants, wash the liquid Mixed filtrate with the mother liquor;

[0046] (3) The filtrate obtained by step 2) was added to the 90 g / L aluminum sulfate solution, and the adjustment system pH was 7.0 to obtain a gel material;

[0047] (4) The gel material obtained by the water washing reaction obtained by step 2), and the 6 g porous alumina is added together, and the mix is ​​uniform;

[0048] (5) The mixture obtained by step 4) was dried at 120 ° C for 6 h to obtain a porous adsorbent, and the water was divided into 9.5%, and the particle diameter was 160-200 mesh.

[0049] 2, adsorption performance test

[0...

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Abstract

The invention discloses a preparation method of a porous adsorbent, which is characterized by comprising the following steps: 1) uniformly mixing one or more of kaolin, sepiolite, attapulgite, diatomite and bentonite, and roasting at 400-700 DEG C for 1-10 hours to obtain a roasted component; (2) adding the roasted component in the step (1) into an alkaline solution, heating to 65-90 DEG C, keeping the temperature for 2-8 hours, filtering to reserve mother liquor, washing reactants with water, and mixing the washing liquor and the mother liquor to obtain filtrate; 3) adding the filtrate obtained in the step 2) into an aluminum salt solution, and adjusting the pH value of the system to 7.5-9.5 to obtain a gel substance; (4) adding the washing reactant obtained in the step (2), the gel substance obtained in the step (3) and an additive together and uniformly mixing, and (5) drying and grinding the mixture obtained in the step (4) to obtain the porous adsorbing.The adsorbent has the advantages that the heavy metal ions can be quickly adsorbed, the efficiency is high, the effect is stable, the production process is clean, and the application prospect is good.

Description

Technical field [0001] The present invention relates to a preparation method of heavy metal ion adsorbents, belonging to the technical field of heavy metal pollution water treatment. Background technique [0002] Heavy metal pollution refers to environmental pollution caused by heavy metals or its compounds, mainly caused by mining, exhaust emissions, sewage irrigation and use heavy metal products. Since the heavy metal has a characteristic that is not easy to move, it cannot be discharged after entering the organism, which can cause chronic poisoning. With the rapid development of the industry, the total amount of industrial wastewater in my country has exceeded 80 billion tons per year, and the emissions of electroplating wastewater reached 6 billion cubic meters, and the heavy metal pollution caused by heavy metals. Therefore, the governance of heavy metal pollution is increasingly attached to people. [0003] At present, the treatment of heavy metal wastewater has mainly ion ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/18B01J20/28B01J20/30C02F1/28C02F101/20
CPCB01J20/186B01J20/28054B01J20/12C02F1/281C02F2101/20
Inventor 郑淑琴陈欧张盼良许俊东李安张岑杨长安孙碧珠
Owner HUNAN INSTITUTE OF SCIENCE AND TECHNOLOGY
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