Preparation method and application of magnetic hectorite composite polymer dye adsorbent for treating dye wastewater

A composite polymer and dye wastewater technology, which is applied in the preparation and application of magnetic hectorite composite polymer dye adsorbent for treating dye wastewater, can solve the problems of secondary pollution and difficult separation, and reduce investment cost, improved compatibility, and the effect of eliminating nitrogen installations

Pending Publication Date: 2022-01-07
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Through the graft copolymerization of KH570 modified magnetic nanoparticles and functional monomers, the compatibility of magnetic nanoparticles and polymer matrix can be improved, the agglomeration of magnetic nanoparticles can be avoided, and the macroscopic phase separation of magnetic nanoparticles and polymer matrix can be suppressed. Realize the magnetic intelligent separation of magnetic polymer dye adsorption, better solve the shortcomings of ordinary adsorbents that are difficult to separate solid from liquid and easily produce secondary pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 10gFeCl 3 ·6H 2 O and 5gFeCl 2 4H 2 O and 100mL of deionized water were added to the three-necked flask, stirred evenly, heated to 80°C after nitrogen protection for 30min, and then added dropwise 25g of ammonia solution with a mass concentration of 25-30%, and reacted at a constant temperature under nitrogen protection after the ammonia solution was added dropwise. 3h, cool down to room temperature, wash with deionized water for 4 times, and separate with a magnet to obtain magnetic nanoparticles; add 3g of magnetic nanoparticles, 8g of silane coupling agent KH570 and 150mL of deionized water into a three-necked flask and stir evenly. The temperature was raised to 80°C, and then 10 g of ammonia solution with a mass concentration of 25 to 30% was added dropwise, and the temperature was lowered to room temperature after 3 hours of constant temperature reaction under nitrogen protection, washed with deionized water for 3 times, and separated by a magnet to obtain KH570 ...

Embodiment 2

[0035] 15gFeCl 3 ·6H 2 O and 6gFeCl2 4H 2 O and 150mL deionized water were added to the three-necked flask, stirred evenly, heated to 50°C after nitrogen protection for 30min, and then added dropwise 35g of ammonia solution with a mass concentration of 25-30%. After the ammonia solution was added dropwise, nitrogen protection was used for constant temperature reaction 6h, cool down to room temperature, wash 5 times with deionized water, and separate with magnet to obtain magnetic nanoparticles; add 2.5g of magnetic nanoparticles, 5g of silane coupling agent KH570 and 100mL of deionized water into a three-necked flask and stir evenly, and protect with nitrogen for 30min Afterwards, the temperature was raised to 50° C., and then 6 g of ammonia solution with a mass concentration of 25 to 30% was added dropwise, cooled to room temperature after nitrogen protection constant temperature reaction for 6 hours, washed with deionized water for 5 times, and separated by a magnet to obta...

Embodiment 3

[0038] 20gFeCl 3 6H2O and 8gFeCl 2 4H 2 O and 200mL of deionized water were added to the three-necked flask, stirred evenly, heated up to 70°C after nitrogen protection for 30min, and then added dropwise 50g of ammonia solution with a mass concentration of 25-30%. 4h, cool down to room temperature, wash with deionized water for 4 times, and separate with magnet to obtain magnetic nanoparticles; add 4g of magnetic nanoparticles, 12g of silane coupling agent KH570 and 200mL of deionized water into a three-necked flask and stir evenly. The temperature was raised to 80°C, and then 12g of ammonia solution with a mass concentration of 25-30% was added dropwise, cooled to room temperature after 3 hours of constant temperature reaction under nitrogen protection, washed with deionized water 3 times, and separated by a magnet to obtain KH570 modified nano-magnetic particles.

[0039] Dissolve 8g NaOH in 200mL deionized water, slowly add 24g acrylic acid to the NaOH aqueous solution in...

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Abstract

The invention relates to a preparation method and application of a magnetic hectorite composite polymer dye adsorbent for treating dye wastewater, an improved chemical coprecipitation method is adopted to prepare magnetic nanoparticles, then a silane coupling agent KH570 is adopted to carry out surface modification on the magnetic nanoparticles, KH570 modified magnetic nanoparticles are obtained, the KH570 modified magnetic nanoparticles, hectorite, polyvinylpyrrolidone and functional monomers are copolymerized, the magnetic hectorite composite polymer dye adsorbent with an organic-inorganic double-network structure and multiple dye adsorption groups is prepared, the saturation magnetization is 3-14 emu/g, the residual magnetism and coercive force both tend to zero, and the magnetic hectorite composite polymer dye adsorbent has paramagnetism and magnetic responsiveness, The gel strength of the water-absorbing gel is 5-20 Pa.s, for a dye aqueous solution with the initial concentration of 100-1000 mg/L, the dye adsorption capacity reaches 50-560 mg/g, adsorption equilibrium is achieved within 60-120 min, the dye adsorption capacity exceeds 90% of the first adsorption capacity after five times of regeneration and recycling, and the water-absorbing gel can be widely applied to adsorption separation of dye wastewater, pollution treatment of the dye wastewater and the like.

Description

technical field [0001] The invention relates to a preparation method and application of a magnetic hectorite composite polymer dye adsorbent for treating dye wastewater, and the magnetic hectorite composite polymer adsorbent prepared by the invention is suitable for the adsorption and magnetic separation of aqueous dyes , can be widely used in dye adsorption, dye separation and purification, and environmental pollution treatment of printing and dyeing wastewater. Background technique [0002] With the improvement of global industrialization, environmental pollution is becoming more and more serious, among which water pollution has seriously affected people's production and life, and industrial wastewater is the main source of dye pollution in water bodies. Dye wastewater mainly comes from dye and dye intermediate production industries and textile, leather, paper, rubber, plastic, cosmetics, pharmaceutical and food industries, with complex composition, large changes in water ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F101/30
CPCB01J20/261B01J20/10B01J20/0229B01J20/28009C02F1/288C02F2101/308
Inventor 万涛谢方玲郑燕郭毅吕桂生张玄何松松王健王泰然
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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