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A method for deep phosphorus removal 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: 2016-10-05
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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  • A method for deep phosphorus removal using embedded lanthanum oxide composite resin
  • A method for deep phosphorus removal 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, th...

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 ph...

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Abstract

A preparation method of embedded lanthanum oxide composite resin, which mainly includes adding strong basic anion exchange resin to lanthanum nitrate solution, fully stirring for reaction, filtering and placing the resin in sodium hydroxide solution at a constant temperature to react, then filtering, washing To neutrality, after heat treatment, an embedded lanthanum oxide composite resin is obtained; using the above-mentioned embedded lanthanum oxide composite resin phosphorus removal method is to place the above composite resin in a glass adsorption column, and control the temperature of the waste water polluted by phosphate at 10 ℃-50℃, pH 2-10, through the fixed-bed column adsorption device filled with adsorption materials in parallel flow; when the concentration of phosphate in the effluent is higher than 0.5mg / L, the mixed solution of NaOH and NaCl is used for desorption, after desorption Adsorbent materials can be recycled. When the polluted water contains a large amount of coexisting ions such as sulfate, chloride, and nitrate, after being treated with the lanthanum oxide composite resin of the present invention, the phosphate of phosphorus-containing wastewater can be reduced below the urban sewage discharge standard without causing Secondary pollution.

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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Patent Type & Authority Patents(China)
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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