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Composite metal oxide phosphorous removal adsorbent and preparation method thereof

A composite metal and phosphorus adsorbent technology, which is applied in chemical instruments and methods, adsorption water/sewage treatment, and other chemical processes, can solve the problems of low phosphorus removal effect, limited adsorption capacity, and small adsorption capacity, and achieve microporous Uniform structure distribution, excellent physical and chemical properties, and high adsorption capacity

Active Publication Date: 2015-11-04
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the phosphorus removal adsorbents such as gravel, bentonite, and construction waste in nature have the advantages of low cost and easy availability, but their porosity is low, the adsorption capacity is small, and the removal effect on phosphorus in sewage is very low; Artificially developed adsorbents, such as iron oxide, activated alumina, activated carbon, etc., have a higher removal effect on pollutants than the former, but their adsorption capacity is limited, adsorption saturation is easy to occur, and their production costs are high, and replacement costs are high. Difficult to be widely used in engineering

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The raw materials are: 500g of alumina, 250g of iron oxide, 250g of calcium oxide, 30g of bentonite, 1030g in total.

[0025] Concrete preparation steps are as follows:

[0026] (1) All the raw materials in the above formula are pulverized, ground and processed through a 100-mesh sieve.

[0027] (2) Mix the above raw materials. After mixing evenly, put a part of the raw materials into the sugar coating machine first, and then feed them while spraying water mist at a speed of 40r / min to 90r / min to make a spherical embryo body of about 1mm.

[0028] (3) Dry the spherical embryo body prepared above in an oven at 102° C. for more than 4 hours.

[0029] (4) Baking the dried spherical embryo body at 600° C. for 30 minutes.

[0030] (5) Continue to heat up the pre-calcined embryo body, keep the roasting temperature at 900°C for about 30 minutes, then continue to slowly heat up, and keep the roasting temperature at 1050°C for about 30 minutes.

[0031] (6) Cooling the calcin...

Embodiment 2

[0033] The raw materials are: 300g of alumina, 300g of iron oxide, 300g of calcium oxide, 27g of bentonite, 927g in total.

[0034] Concrete preparation steps are as follows:

[0035] (1) All the raw materials in the above formula are pulverized, ground and processed through a 100-mesh sieve.

[0036] (2) Mix the above raw materials. After mixing evenly, put the raw materials into the sugar coating machine, and then feed them while spraying water mist at a speed of 40r / min to 90r / min to make a spherical embryo body of about 1mm.

[0037] (3) Dry the spherical embryo body prepared above in an oven at 102° C. for more than 4 hours.

[0038] (4) Baking the dried spherical embryo body at 600° C. for 30 minutes.

[0039] (5) Continue to heat up the pre-calcined embryo body, keep the roasting temperature at 900°C for about 30 minutes, then continue to slowly heat up, and keep the roasting temperature at 1050°C for about 30 minutes.

[0040] (6) Cooling the calcined spheres to bel...

Embodiment 3

[0042] The raw materials are: 200g of alumina, 200g of iron oxide, 200g of calcium oxide, 30g of bentonite, 630g in total.

[0043] Concrete preparation steps are as follows:

[0044] (1) All the raw materials in the above formula are pulverized, ground and processed through a 100-mesh sieve.

[0045] (2) Mix the above raw materials. After mixing evenly, put the raw materials into the sugar coating machine, and then feed them while spraying water mist at a speed of 40r / min to 90r / min to make a spherical embryo body of about 1mm.

[0046] (3) Dry the spherical embryo body prepared above in an oven at 102° C. for more than 4 hours.

[0047] (4) Baking the dried spherical embryo body at 600° C. for 30 minutes.

[0048] (5) Continue to heat up the pre-calcined spherical embryo body, keep the roasting temperature at 900°C for about 30 minutes, and then continue to slowly heat up to the roasting temperature at 1150°C for about 30 minutes.

[0049] (6) Cooling the calcined spheres...

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Abstract

The invention discloses a composite metal oxide phosphorous removal adsorbent and a preparation method thereof. The composite metal oxide phosphorous removal adsorbent comprises main materials and an auxiliary material. The main materials comprise, by weight, 35-50% of alumina, 25-35% of iron oxide and 25-35% of calcium oxide. The auxiliary material comprises bentonite as a binder and the weight of the auxiliary material is 3-5% that of the main materials. The preparation method comprises raw material pre-treatment, blank molding, blank drying, presintering treatment, roasting treatment and cooling. The composite metal oxide phosphorous removal adsorbent has excellent physical and chemical properties and a high phosphorous removal adsorption capability and solves the problem of use of a single metal oxide. The composite metal oxide phosphorous removal adsorbent reduces sewage factory product water phosphorous content, satisfies upgrading and reconstruction purposes, realizes first-level A discharge standard and has a good development prospect and a practical meaning.

Description

technical field [0001] The invention belongs to the technical field of water treatment for environmental protection, and in particular relates to a composite metal oxide phosphorus-removing adsorbent for sewage plant discharge water and a preparation method thereof. Background technique [0002] Eutrophication of water body is an important problem faced by human beings. Among the nutrients that cause water eutrophication, phosphorus is the main limiting factor. In order to reduce the impact of phosphorus in the effluent of sewage treatment plants on the eutrophication of water bodies, most sewage treatment plants have begun to upgrade their standards, so that the discharge standards of sewage treatment plants have been upgraded from the first-class B standard to the first-class A standard. [0003] At present, there are mainly biological methods and chemical precipitation methods for phosphorus removal in sewage treatment plants at home and abroad. The effect of biological...

Claims

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Application Information

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IPC IPC(8): B01J20/12B01J20/30C02F1/28
Inventor 任勇翔柳杨高卫荣高中秋范淼韩培池延斌杨双平蒋善庆
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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