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Method for preparing composite dephosphorus adsorbent by virtue of activated carbon fiber loaded with metal

A technology of activated carbon fiber and phosphorus adsorbent, applied in chemical instruments and methods, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of low phosphorus affinity, few adsorption sites, and low removal rate No advanced problems, achieve the effect of lower preparation cost, simple equipment, and enhanced transfer process

Inactive Publication Date: 2012-07-11
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, activated carbon fiber has low affinity for phosphorus in environmental wastewater, few adsorption sites, and low removal rate. It is difficult to meet the standard for wastewater treatment only with activated carbon fiber.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The specific steps of this embodiment are:

[0026] a. When the molar ratio of iron and lanthanum ions is 1:1, configure 20 mL of a mixed solution of iron nitrate and lanthanum nitrate with a total molar concentration of 0.05 mol / L;

[0027] b. Put the solution configured in step a into an ultrasonic environment, and gradually add NaOH solution with a concentration of 5% to the metal ion mixed solution in step a while radiating ultrasonic waves until the pH is 9-10, to obtain iron lanthanum Composite metal hydroxide nanoparticle suspension;

[0028] c. Cut the activated carbon fiber into 0.4~0.6cm cubes, wash them several times with water, then immerse, filter and dry in deionized water;

[0029] d. Weigh 0.2 g of the activated carbon fiber obtained in step c, add it to the suspension obtained in step b, treat it with ultrasonic for 10 min, remove the solid and wash it with deionized water several times until the pH is 7;

[0030] e. Dry the solid obtained in step d at a drying ...

Embodiment 2

[0037] The technical solution of this embodiment is basically the same as that of the first embodiment, the difference lies in:

[0038] In step a, 20 mL of a mixed solution of iron nitrate and lanthanum nitrate with a total molar concentration of 0.1 mol / L is prepared when the molar ratio of iron and lanthanum ions is 1:1. Table 1 shows the adsorption capacity data of the composite phosphorus removal adsorbent in this example.

Embodiment 3

[0040] The technical solution of this embodiment is basically the same as that of the previous embodiment, but the difference lies in:

[0041] In step a, when the molar ratio of iron and lanthanum ions is 1:1, 20 mL of a mixed solution of iron nitrate and lanthanum nitrate with a total molar concentration of 0.15 mol / L is prepared. The adsorption capacity data of the composite phosphorus removal adsorbent in this example is shown in Table 1.

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Abstract

The invention discloses a method for preparing composite dephosphorus adsorbent by virtue of activated carbon fiber loaded with metal. Carbon fiber is used as a matrix which is loaded with a metallic compound. The method comprises the following steps of: a, mixing lanthanum ions into an iron salt for preparing a mixture solution of iron ions and lanthanum ions; b, putting the prepared solution under an ultrasound environment, additionally adding a radiation method, gradually adding a hydroxide solution into a metallic ion mixture solution until the pH reaches 9-10, and obtaining nano-particle suspension liquid of iron and lanthanum composite metal hydroxide; c, shearing activated carbon fiber into pieces, washing, dipping, filtering and drying; d, weighing the activated carbon fiber, adding the activated carbon fiber into the suspension liquid, processing by utilizing ultrasound waves, taking out solid matters, and washing for multiple times until the pH reaches 7; and e, drying the solid matters, obtaining an adsorbent material after cooling, and sealing the adsorbent material for storage. According to the invention, the iron and lanthanum composite metal hydroxide is in uniform particle size distribution on the carbon fiber matrix, has a high adsorption capacity and a low preparation cost and is suitable for industrial application.

Description

technical field [0001] The invention relates to a method for preparing an adsorbent for phosphorus removal, in particular to a method for preparing a composite metal adsorbent for phosphorus removal. Background technique [0002] At present, the water pollution problem is all over the world, especially near cities and industrial areas. Water pollution is particularly serious. Even developed countries have not completely solved the problem of water pollution. Another problem facing the world is the shortage of water resources. To a certain extent, it restricts the development of regional economy. With the rapid development of industry and the continuous improvement of rural urbanization, the shortage of water supply and sewage purification will become one of the main problems faced by our country and even all over the world. With the increasing development and utilization of environmental resources by human beings, a large amount of domestic sewage and industrial wastewater ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F1/58
Inventor 刘建勇张玲周奇吴文韬
Owner SHANGHAI UNIV
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