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Concave-convex bar stone clay-trihydrate alumina/iron nano composite adsorbing agent, preparation and applications

A technology of attapulgite clay and composite adsorption, which is applied in chemical instruments and methods, adsorption water/sewage treatment, and other chemical processes, and can solve problems such as unsatisfactory adsorption effect and low specific surface area

Inactive Publication Date: 2008-08-27
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the specific surface area of ​​these mineral materials is low, and the adsorption effect is not ideal.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Select attapulgite clay ore with attapulgite content not less than 50%, stockpile and homogenize in advance;

[0033] Add water to the stockpiled and homogenized attapulgite clay raw material, adjust the mass volume ratio of attapulgite clay to water to 2-3g / mL, and shear and extrude attapulgite clay flakes through a double-roll extruder shape;

[0034] Attapulgite clay flakes are dried and pulverized into powders that all pass through a 200-mesh sieve;

[0035] Add 10 grams of attapulgite powder into 100 mL of distilled water, stir at high speed for 5-30 minutes, add 10 g of ALCl 3 , continuously stirred for 30 minutes, washed, dehydrated, dried at a temperature of 80° C., and then pulverized to obtain a powdery composite adsorbent.

[0036] Take 0.1g of powdery composite adsorbent and add it to 100ml of aqueous solution containing 5mg / L phosphorus, stir for 30 minutes to complete the adsorption, after 2 hours of static settling, measure the concentration of phosphor...

Embodiment 2

[0038] Select attapulgite clay ore with attapulgite content not less than 50%, and pre-stock and homogenize;

[0039] Add water to the stockpiled and homogenized attapulgite clay raw material, adjust the mass volume ratio of attapulgite clay to water to 2-3g / mL, and shear and extrude attapulgite clay flakes through a double-roll extruder shape;

[0040] Attapulgite clay flakes are dried and pulverized into powders that all pass through a 200-mesh sieve;

[0041] Add 10 grams of attapulgite powder into 100 mL of distilled water, stir at high speed for 5-30 minutes, add 5 g of AlCl 3 and 5g FeCl 3 Stir continuously for 30 minutes, wash, dehydrate, dry at 80° C., and pulverize to obtain a powdery composite adsorbent.

[0042] Add 0.1g of powdery composite adsorbent to 100ml of aqueous solution containing 5mg / L of phosphorus, stir for 30 minutes to complete the adsorption, and after 2 hours of static settling, measure the concentration of phosphorus in the supernatant, and the ...

Embodiment 3

[0044] Select attapulgite clay ore with attapulgite content not less than 50%, and pre-stock and homogenize;

[0045] Add water to the stockpiled and homogenized attapulgite clay raw material, adjust the mass volume ratio of attapulgite clay to water to 2-3g / mL, and shear and extrude attapulgite clay flakes through a double-roll extruder shape;

[0046] Attapulgite clay flakes are dried and pulverized into powders that all pass through a 200-mesh sieve;

[0047] Add 10 grams of attapulgite powder into 100 mL of distilled water, stir at high speed for 5-30 minutes, add 5 g of AlCl 3 and 5g FeCl 3 Stir continuously for 30 minutes, wash, dehydrate, granulate into 2-3mm particles, and dry at 80°C to obtain granular adsorbent with particle strength > 25N.

[0048] Pack the granular composite adsorbent into an experimental column with a diameter of 2 cm and a height of 50 cm, and use a peristaltic pump to flow up and input an aqueous solution containing 5 mg / L of phosphorus at a hy...

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Abstract

A composite adsorbent of attapulgus clay-aluminum hydroxide / iron nano-scale and a preparation method and application thereof are provided. The composite adsorbent is characterized in that prepared by loading aluminum hydroxide or mixture of hydroxides of aluminum and iron on the surface of attapulgus mineral, the aluminum hydroxide or the mixture of hydroxides of aluminum and iron has a content of 5-50wt% in the adsorbent; and the content of aluminum hydroxide in the mixture is not lower than that of iron hydroxide. The composite adsorbent has high adsorption capacity to P, As and F in water, and can be used for deep dephosphorization treatment of waste water from domestic sewage treatment plants, dephosphorization of eutrophic water bodies and treatment of high-As or high-F ground water.

Description

technical field [0001] The invention relates to an adsorbent, more specifically to an adsorbent with attapulgite as a carrier, its preparation and its application in treating low-concentration phosphorus, arsenic and fluorine in water. Background technique [0002] In recent years, the phosphorus content in water bodies has risen sharply. On the one hand, the excess phosphorus comes from non-point source pollution of industrial wastewater and domestic sewage; on the other hand, it also has its endogenous effect, that is, the sediment in the water body will release phosphoric acid in the reduced state Salt, thereby increasing the phosphorus content. Phosphorus eutrophication mainly occurs in lakes, reservoirs, bays, plain river ditches and ditches, urban rivers, urban landscape water bodies and other waters with poor self-purification ability. In recent years, the continuous occurrence of red tides in the Bohai Sea is directly related to the high content of phosphorus and ni...

Claims

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Application Information

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IPC IPC(8): B01J20/08B01J20/30C02F1/28
Inventor 陈天虎谢晶晶周本军孙玉兵潘敏
Owner HEFEI UNIV OF TECH
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