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A kind of polymer modified adsorbent, its preparation method and its application

A polymer and adsorbent technology, applied in chemical instruments and methods, adsorption water/sewage treatment, and other chemical processes, can solve the problems of poor phosphorus adsorption capacity, poor regeneration and recycling capacity, and high cost, and achieve accelerated removal , Fast adsorption speed, strong regenerative ability

Active Publication Date: 2022-07-26
NANJING TECH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cost of natural materials and industrial waste slag adsorbents is low, but the phosphorus adsorption capacity is also relatively poor, and some industrial waste slags such as slag may also have potential ecotoxicity; activated alumina has good thermal stability and good adsorption performance, but the cost Higher, poor regeneration and recycling capacity

Method used

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  • A kind of polymer modified adsorbent, its preparation method and its application
  • A kind of polymer modified adsorbent, its preparation method and its application
  • A kind of polymer modified adsorbent, its preparation method and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Preparation of 6%-PEI-CaAlLa-LDH:

[0032] At room temperature, 4.44g CaCl 2 , 1.07g AlCl 3 and 0.87g La (NO 3 ) 3 ·6H 2 O was dissolved in 100 mL of deionized water to form a mixed salt solution, and then a polyethyleneimine solution with a concentration of 6 wt% was slowly added to the mixed salt solution to form an imine salt mixed solution. Take 0.5mol / L Na 2 CO 3 The solution was added dropwise to the imide salt mixed solution at a speed of 5 mL / min, and the reaction was carried out to obtain an intermediate reaction solution.

[0033]Keep stirring the intermediate reaction solution until the pH of the intermediate reaction solution = 8, then age at 60 °C for 6 hours, filter, wash the filter cake several times, dry at 70 °C for 12 hours, and finally grind , that is, a polyethyleneimine-modified calcium aluminum lanthanum hydrotalcite (6%-PEI-CaAlLa-LDH) composite material is obtained.

[0034] When the intermediate reaction solution was stirred, the stirrin...

Embodiment 2

[0037] Preparation of 7%-PEI-CaAlLa-LDH:

[0038] At room temperature, 4.44g CaCl 2 , 1.07g AlCl 3 and 0.87g La (NO 3 ) 3 ·6H 2 O was dissolved in 100 mL of deionized water to form a mixed salt solution, and then a polyethyleneimine solution with a concentration of 7 wt% was slowly added to the mixed salt solution to form an imine salt mixed solution. Take 0.6mol / L Na 2 CO 3 The solution was added dropwise to the imide salt mixed solution at a speed of 6 mL / min, and the reaction was carried out to obtain an intermediate reaction solution.

[0039] Keep stirring the intermediate reaction solution until the pH of the intermediate reaction solution = 8, then age at 70 °C for 7 hours, filter, wash the filter cake several times, dry at 70 °C for 16 hours, and finally grind , that is, a polyethyleneimine-modified calcium aluminum lanthanum hydrotalcite (7%-PEI-CaAlLa-LDH) composite material is obtained.

[0040] When the intermediate reaction solution was stirred, the stirri...

Embodiment 3

[0042] Preparation of 8%-PEI-CaAlLa-LDH:

[0043] At room temperature, 4.44g CaCl 2 , 1.07g AlCl 3 , 0.87g La (NO 3 ) 3 ·6H 2 O was dissolved in 100 mL of deionized water to form a mixed salt solution, and then the polyethyleneimine solution with a concentration of 8wt% was slowly added to the mixed salt solution to form an imide salt mixed solution. Take 0.7mol / L Na 2 CO 3 The solution was added dropwise to the imide salt mixed solution at a speed of 7 mL / min, and the reaction was carried out to obtain an intermediate reaction solution.

[0044] Keep stirring the intermediate reaction solution until the pH of the intermediate reaction solution = 9, then age at 80°C for 10h, filter, wash the filter cake several times, dry at 80°C for 20h, and finally grind it , that is, a polyethyleneimine-modified calcium aluminum lanthanum hydrotalcite (8%-PEI-CaAlLa-LDH) composite material is obtained.

[0045] When the intermediate reaction solution was stirred, the stirring time w...

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Abstract

The invention discloses a preparation method of a polymer modified adsorbent. The steps are: (1) dissolving calcium salt, aluminum salt and lanthanum salt in deionized water to form a mixed salt solution; (2) dissolving polyethyleneimine The aqueous solution was added to the mixed salt solution to form a mixed solution of imide salts, and the Na 2 CO 3 The solution is added dropwise into the imide salt mixed solution until the pH value of the mixed solution is stable at 8 to 9 to obtain an intermediate reaction solution; (3) maintaining the stirring of the intermediate reaction solution, aging the intermediate reaction solution, and then filtering and collecting Precipitate; (4) Prepared after washing, drying and grinding the precipitate. The present application also discloses the polymer modified adsorbent produced by the above preparation method and its use. The adsorbent prepared by the application has the characteristics of fast adsorption speed, large adsorption capacity, and recyclable use.

Description

technical field [0001] The present invention relates to a polymer modified adsorbent, its preparation method and its application. Background technique [0002] Phosphorus is a resource with limited storage on the earth. It is an important component of nucleic acids and proteins. It exists in the form of phospholipids in cell membranes, so it is an essential nutrient for all living organisms. Due to the large demand for phosphorus in industry and agriculture, high concentrations of phosphorus exist in lake water and river water, and excessive phosphorus in water bodies can cause water eutrophication. The occurrence of this phenomenon will stimulate algae to grow wildly due to the acquisition of nutrients, reduce the oxygen content in the water, cause the death of microorganisms in the water, destroy the balance of the ecosystem, and reduce the quality of drinking water, so it is important to reduce the phosphorus content in sewage. meaning. [0003] At present, a large numb...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F101/10
CPCB01J20/261C02F1/288C02F1/285C02F1/281C02F2101/105
Inventor 杨刚徐长振熊丽媛孙朋飞
Owner NANJING TECH UNIV
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