Loess particle grafted copolymer adsorbent and preparation method thereof

A graft copolymer and adsorbent technology, applied in the field of loess-based adsorbents, can solve the problems of expensive, limited application, and secondary pollutants, and achieve no secondary pollution, good biocompatibility, and good adsorption performance Effect

Inactive Publication Date: 2017-06-30
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, reverse osmosis, ion exchange, electrolysis and electrodialysis are relatively expensive, which largely limits their application.
Chemical precipitation and conventional flocculation techniques have the potential to cause secondary pollutants

Method used

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  • Loess particle grafted copolymer adsorbent and preparation method thereof
  • Loess particle grafted copolymer adsorbent and preparation method thereof
  • Loess particle grafted copolymer adsorbent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Acidification of loess particles: Take a certain amount of loess particles, disperse them into HCl solution with a concentration of 5 mol / L, stir at 65°C for 3 hours, cool, filter, wash with distilled water until neutral, and dry in vacuum at 60°C for 12 hours, the acidified loess is obtained.

[0037] (2) Surface modification of loess particles: Take 1 g of acidified loess particles, disperse them in 10 mL of anhydrous ethanol-water (volume ratio of ethanol to water: 3:1), and stir for 30 minutes at room temperature; Adjust the pH of the system to 2.0 with glacial acetic acid, then add 0.5 g of KH-570, and stir for 30 minutes; then adjust the pH of the system to 9.0 with ammonia water, raise the temperature to 60°C, and stir for 5 hours to complete the reaction. The product is filtered and washed with ethanol Three times, vacuum drying at 60° C. for 5 hours to obtain surface-modified loess particles.

[0038] (3) Preparation of graft copolymer: 1 g of surface-modifi...

Embodiment 2

[0041] (1) Acidification of loess particles: Take a certain amount of loess particles, disperse them into HCl solution with a concentration of 3 mol / L, stir at 50°C for 5 hours, cool, filter, wash with distilled water until neutral, and dry in vacuum at 50°C for 24 hours. hours, the acidified loess is obtained.

[0042] (2) Surface modification of loess particles: Take 10 g of acidified loess particles, disperse them in 100 mL of ethanol-water (4:1 volume ratio of ethanol to water) mixed solution, stir and disperse at room temperature for 30 minutes; Adjust the pH of the system to 3.5, add 2.0 g KH-171, and stir for 30 minutes; then adjust the pH of the system to 10 with ammonia water, raise the temperature to 85°C, and stir for 3 hours to complete the reaction. Dry under vacuum for 3 hours to obtain surface-modified loess particles.

[0043] (3) Preparation of graft copolymer: Add 2.5 g of surface-modified loess particles to 30 mL of 1,4-dioxane, stir well at room temperatur...

Embodiment 3

[0046] (1) Acidification of loess particles: Take a certain amount of loess particles, disperse them into HCl solution with a concentration of 1 mol / L, stir at 80°C for 1 hour, cool, filter, wash with distilled water until neutral, and dry in vacuum at 60°C for 36 hours, the acidified loess is obtained.

[0047] (2) Surface modification of loess particles: Take 15 g of acidified loess particles, disperse them in 150 mL of ethanol-water (volume ratio of ethanol to water: 5:1), and stir for 30 minutes at room temperature. Adjust the pH of the system to 5.0 with glacial acetic acid, add 5.0 g of KH-171, and stir for 40 minutes. Then the pH of the system was adjusted to 11.0 with ammonia water, the temperature was raised to 60°C, and the reaction was fully stirred for 5 hours to complete the reaction. The product was suction filtered, washed with ethanol three times, and vacuum-dried at 30°C for 5 hours to obtain surface-modified loess particles.

[0048] (3) Preparation of graft...

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Abstract

The invention discloses an environment-friendly loess particle grafted copolymer preparation method, which comprises: using loess particles as a matrix, carrying out acidification, modifying with a silane coupling agent, and carrying out a surface grafting copolymerization reaction to successfully graft the copolymer of N-vinylpyrrolidone and maleic anhydride onto the loess particle surface so as to obtain the loess grafted copolymer having adsorption function, wherein the copolymer adopted as the adsorbent has characteristics of good biocompatibility, no toxicity and no secondary pollution, and is the environmentally friendly polymer adsorbent. According to the present invention, the adsorption test results show that the prepared loess particle grafted copolymer adsorbent can well absorb lead ions and methylene blue in wastewater, and has good application prospects in the fields of wastewater containing heavy metal ions, dye wastewater, and the like.

Description

technical field [0001] The invention relates to a loess-based adsorbent, especially the preparation of a loess particle grafted N-vinylpyrrolidone copolymer (environmentally friendly loess particle graft copolymer) with good biocompatibility, which is mainly used for The treatment of waste water containing lead ions and dyes belongs to the technical field of polymer materials and water treatment. Background technique [0002] With the improvement of industrialization, environmental pollution is becoming more and more serious, especially water pollution. In today's world, the amount of human drinking water is still in short supply. Studies have shown that there are more than 700 kinds of pollutants in water bodies, most of which are toxic and carcinogenic, and some can persist in the environment for a long time, neither biodegradable nor biotransformable. Heavy metal pollution in the environment has the disadvantages of persistence, concealment, high toxicity, and not easy ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F292/00C08F226/10C08F222/06C08F222/38C08F222/14C08F220/32B01J20/26B01J20/30C02F1/28C02F101/20C02F101/38
CPCC08F292/00B01J20/264C02F1/285C02F2101/20C02F2101/308C02F2101/38C08F226/10
Inventor 王荣民汪倩倩李虹何玉凤
Owner NORTHWEST NORMAL UNIVERSITY
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