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Method for deep dephosphorization by using embedded lanthanum oxide composite resin

A technology of composite resin and lanthanum oxide, which is applied in chemical instruments and methods, separation methods, and other chemical processes, can solve the problems of lack of nano-small size effect of functional adsorption materials, low working adsorption capacity, and single force, etc., to achieve improvement Dispersed state on the inner surface, solving the effect of large fluid resistance and strengthening the adsorption performance

Active Publication Date: 2014-11-12
HEBEI YANYONG ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the carrier force of this type of composite resin is relatively single, and the submerged particles often have local agglomeration and growth of particles, which leads to the lack of nano-size effect of functional adsorption materials and low working adsorption capacity.

Method used

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  • Method for deep dephosphorization by using embedded lanthanum oxide composite resin
  • Method for deep dephosphorization by using embedded lanthanum oxide composite resin

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Take 25g of D201 type anion exchange resin (manufactured by Hangzhou Zhengguang Industrial Co., Ltd.) as a carrier material, place it in 2.5L aqueous solution containing 5% lanthanum nitrate, control the reaction temperature at 40°C, fully stir the reaction for 10h, and gradually diffuse La to the inner surface of the anion exchange resin pores. Then filter the resin and put it in 1500mL of 5% sodium hydroxide solution for in-situ precipitation reaction at room temperature, control the precipitation reaction time for 10h, after the reaction is completed, filter and heat treatment at 40°C for 5h, so as to obtain Formula nano-lanthanum oxide composite resin, such as figure 1 As shown, its loading is 6.5%.

[0021] Put 3mL of the above composite resin in a glass adsorption column (ф12×220mm) 4 2- =200mg / L, Cl - =100mg / L, NO 3 - =160mg / L, pH=5) flow through the adsorption column equipped with composite resin from top to bottom, the temperature is controlled at 15°C, t...

Embodiment 2

[0023] Take 50g of 201x7 type anion exchange resin (manufactured by Tianjin Bohong Resin Technology Co., Ltd.) as a carrier material, place it in 1000mL aqueous solution containing 10% lanthanum nitrate, control the reaction temperature at 60°C, fully stir the reaction for 12h, so that La gradually diffuses to the inner surface of the anion exchange resin pores. Then filter the resin and place it in 2000mL of 10% sodium hydroxide solution for in-situ precipitation reaction at room temperature. The precipitation reaction time is controlled to be 12h. Type nano-lanthanum oxide composite resin, its loading capacity is 22.31%.

[0024] Put 5mL of the above-mentioned composite resin in a glass adsorption column (ф20×420mm) and phosphate-containing surface water (P=10mg / L and 4 2- =180mg / L, Cl - =200mg / L, NO 3 - =220mg / L, pH=10) flow through the adsorption column equipped with composite resin from top to bottom, the temperature is controlled at 50°C, the flow rate is 50BV / h, an...

Embodiment 3

[0026]Take 20g of D202 (produced by Hebei Guoao Resin Factory) as a carrier material, place it in 2L aqueous solution containing 35% lanthanum nitrate, control the reaction temperature at 55°C, stir and react for 11h, so that La gradually diffuses into the anion exchange resin channel surface. Then filter the resin and place it in 2000mL of 15% sodium hydroxide solution for in-situ precipitation reaction at room temperature, control the precipitation reaction time for 12h, after the reaction is completed, filter and heat-treat at 55°C for 5h to obtain intercalation Formula nano-lanthanum oxide composite resin, such as figure 1 As shown, its loading is 18.5%.

[0027] Put 4mL of the above composite material in a glass adsorption column (ф12×220mm) 4 2- =200mg / L, Cl - =200mg / L, NO 3 - =260mg / L, pH=6) flow through the adsorption column equipped with composite resin from top to bottom, the temperature is controlled at 20°C, the flow rate is 10BV / h, and the concentration of p...

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Abstract

A method for preparing embedded lanthanum oxide composite resin mainly includes the steps that strong basicity anion exchange resin is added into a lanthanum nitrate solution, the mixture is fully stirred for reaction and then filtered, the resin is placed in a sodium hydroxide solution, reacts at the constant temperature, and then is filtered and washed to be neutral, and the processed resin is treated in a thermal mode to obtain the embedded lanthanum oxide composite resin. The method for dephosphorization by using the embedded lanthanum oxide composite resin includes the steps that the composite resin is placed in a glass adsorption column, and waste water polluted by phosphate flows downstream through the static bed column adsorption device filled with the adsorption material, wherein the temperature of the waste water is controlled to be 10 DEG C-50 DEG C, and the pH is controlled to be 2-10; when the concentration of the phosphate in outlet water is larger than 0.5 mg / L, a mixed solution of sodium hydroxide and sodium chloride is adopted for desorption, and the desorbed adsorption material can be recycled. When a polluted water body contains a great deal of co-existing ions such as sulfate radical, chloride ions and nitrate, the concentration of the phosphate in the phosphorus waste water treated through the lanthanum oxide composite resin can be reduced below the town sewage discharge standard, and secondary pollution is avoided.

Description

technical field [0001] The invention relates to a sewage treatment method, in particular to a method for purifying phosphate in water. Background technique [0002] Phosphorus is a nutrient-rich substance that mainly comes from various industrial raw materials, agricultural waste, detergents, etc. If the phosphorus content in the water body exceeds the standard seriously, it can cause eutrophication of the water body, cause a large number of algae to multiply, kill a large number of fish, and make the water body stink, which will indirectly or directly endanger human health. [0003] At present, the phosphate treatment technology in sewage at home and abroad is relatively mature, mainly including chemical method, biological method and constructed wetland method. Chemical methods mainly include chemical precipitation, ion exchange, reverse osmosis, electrodialysis, reverse osmosis, adsorption and other methods. The chemical method has a high efficiency of phosphorus removal....

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30B01J20/34C02F1/28
Inventor 张庆瑞滕洁郝红珊焦体峰王素凤孙奇娜
Owner HEBEI YANYONG ENVIRONMENTAL TECH CO LTD
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