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Method for preparing lanthanum and iron composite absorbing phosphorous removal agent

A composite adsorption and dephosphorization agent technology, 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 high problems, to achieve the effect of fast adsorption rate, increase load capacity, and strengthen the transfer process

Inactive Publication Date: 2013-08-14
SHANGHAI XIANDE WATER PURFICATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Method for preparing lanthanum and iron composite absorbing phosphorous removal agent

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Experimental program
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Embodiment 1

[0026] This embodiment relates to a method for preparing a lanthanum-iron composite adsorption dephosphorization agent, the method comprising the following steps:

[0027] Step 1, configure 20mL total molar concentration as ferric nitrate and ferric nitrate mixed solution of 0.1mol / L when the molar ratio of iron lanthanum ion is 9:1;

[0028] Step 2, cut the activated carbon fiber into 0.4-0.6cm cubes, wash with water for several times, soak in deionized water, filter and dry;

[0029] Step 3, weigh 0.2 g of the activated carbon fiber obtained in step 2, add ferric nitrate and ferric nitrate mixed solution, and use ultrasonic treatment to oscillate and mix for 10 minutes, and take out the solid;

[0030] Step 4, immersing the solid obtained in step 3 in 20% ammonia solution (pH=10) for 2 hours, so that the mixed metal ions are deposited on the carrier ACF;

[0031] In step 5, the solid obtained in step 4 is taken out and washed several times with deionized water until the pH ...

Embodiment 2

[0033] This embodiment relates to a method for preparing a lanthanum-iron composite adsorption dephosphorization agent, the method comprising the following steps:

[0034] Step 1, when configuring 20mL total molar concentration as 0.2mol / L ferric nitrate and ferric nitrate mixed solution when being 7:3 with iron lanthanum ion molar ratio;

[0035] Step 2, cut the activated carbon fiber into 0.4-0.6cm cubes, wash with water for several times, soak in deionized water, filter and dry;

[0036] Step 3, weighing 0.2 g of the activated carbon fiber obtained in step 2, adding ferric nitrate and ferric nitrate mixed solution, ultrasonic treatment and shaking and mixing for 20 minutes, and taking out the solid;

[0037] Step 4, immersing the solid obtained in step 3 in 25% ammonia solution (pH=12) for 5 hours, so that the mixed metal ions are deposited on the carrier ACF;

[0038] Step 5: Take out the solid obtained in step 4 and wash it several times with deionized water until the pH...

Embodiment 3

[0040] This embodiment relates to a method for preparing a lanthanum-iron composite adsorption dephosphorization agent, the method comprising the following steps:

[0041] Step 1, when configuring 20mL total molar concentration as 0.3mol / L ferric nitrate and ferric nitrate mixed solution when the iron lanthanum ion molar ratio is 1:1;

[0042] Step 2, cut the activated carbon fiber into 0.4-0.6cm cubes, wash with water for several times, soak in deionized water, filter and dry;

[0043] Step 3, weighing 0.2 g of the activated carbon fiber obtained in step 2, adding ferric nitrate and ferric nitrate mixed solution, using ultrasonic treatment to vibrate and mix for 30 minutes, and taking out the solid;

[0044] Step 4, immerse the solid obtained in step 3 in 28% ammonia solution (pH=13) for 3 hours, so that the mixed metal ions are deposited on the carrier ACF;

[0045] In step 5, the solid obtained in step 4 is taken out and washed several times with deionized water until the ...

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Abstract

The invention discloses a method for preparing lanthanum and ferric composite absorbing phosphorous removal agent. The method comprises the following steps: firstly, preparing a mixed solution of iron nitrate and lanthanum nitrate; secondly, washing crude activated carbon fiber for a plurality of times through water, putting the washed crude activated carbon fiber into deionized water for dipping, filtering and drying so as to obtain fine activated carbon fiber; thirdly, adding the fine activated carbon fiber into the mixed solution of the iron nitrate and the lanthanum nitrate, and performing ultrasonic treatment on the fine activated carbon fiber, so as to obtain solid matter A; fourthly, putting the solid matter A into an aqueous solution of ammonia for dipping, and filtering the solid matter A; and fifthly, washing a filter cake obtained in the step four for a plurality of times through the deionized water till the pH value is 7, and then drying and cooling the filter cake to be at room temperature, so as to obtain the lanthanum and ferric composite absorbing phosphorous removal agent. The method adopts liquid phase deposition, realizes the uniform loading of two types of metal on the surface of a material, and overcomes the phenomenon of non uniform mixing of the metal due to layering of various metal by adopting direct precipitation method. The adsorbent obtained through using the method has the advantages of high adsorption capacity, high adsorption rate and the like.

Description

technical field [0001] The invention relates to a preparation method of a composite adsorption dephosphorization agent, in particular to a method for preparing a lanthanum-iron composite adsorption dephosphorization agent. Background technique [0002] With the increasing development and utilization of environmental resources by human beings, a large amount of nitrogen and phosphorus-rich domestic sewage, industrial wastewater, and farmland water with pesticides and fertilizers entering rivers, lakes and seas will cause eutrophication of water bodies, and the problem of environmental pollution has become increasingly prominent. . Phosphorus is a key factor of water eutrophication. Effectively reducing the content of phosphorus in discharged wastewater has become an important way to prevent and control water eutrophication, control water pollution, and realize the recycling of phosphorus. The research and development of economical and efficient phosphorus removal technology ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/32C02F1/28C02F1/58
Inventor 赵锰
Owner SHANGHAI XIANDE WATER PURFICATION TECH
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