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Application of ionic liquid functionalized silica gel in the removal of phenolic pollutants in wastewater

An ionic liquid, functional technology, applied in water pollutants, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve tedious liquid-liquid separation process, secondary pollution of water body, and ionic liquid dissolution loss and other problems, to achieve the effect of high adsorption efficiency, uniform particle size and excellent mechanical properties

Active Publication Date: 2017-11-24
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when ionic liquids with good water solubility are directly used in the water phase, a cumbersome liquid-liquid separation process is required, and at the same time, it is easy to cause the dissolution loss of the ionic liquid in the water body, causing secondary pollution of the water body

Method used

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  • Application of ionic liquid functionalized silica gel in the removal of phenolic pollutants in wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Using 50 mL of methanol as a solvent, pre-polymerize 0.4 g of vinyltriethoxysilanized silica gel and 0.46 mg of 1-vinyl-3-butylimidazolium bromide ionic liquid at room temperature for 4 h, then add the cross-linking agent ethylene glycol Dimethacrylate and azobisisobutyronitrile are initiators, in which 1-vinyl-3-butylimidazolium bromide ionic liquid, crosslinking agent ethylene glycol dimethacrylate and initiator azobisisobutyronitrile The molar ratio of butyronitrile is 3:10:0.05, and the product obtained by heat-initiated polymerization at 50°C for 24h is extracted by Soxhlet with methanol / acetic acid (V / V=9:1) mixed solution for 48h, and then washed with methanol and placed at 60°C Vacuum drying to obtain ionic liquid functionalized silica gel.

Embodiment 2

[0015] Using 50 mL of methanol as a solvent, pre-polymerize 0.4 g of vinyltriethoxysilanized silica gel and 0.46 mg of 1-vinyl-3-butylimidazolium bromide ionic liquid at room temperature for 4 h, then add the cross-linking agent ethylene glycol Dimethacrylate and azobisisobutyronitrile are initiators, in which 1-vinyl-3-butylimidazolium bromide ionic liquid, crosslinking agent ethylene glycol dimethacrylate and initiator azobisisobutyronitrile The molar ratio of butyronitrile is 1:5:0.03, and the product obtained by heat-initiated polymerization at 60°C for 20h is extracted by Soxhlet with methanol / acetic acid (V / V=9:1) mixed solution for 50h, then washed with methanol and placed at 60°C Vacuum drying to obtain ionic liquid functionalized silica gel.

Embodiment 3

[0017] Using 50 mL of methanol as a solvent, pre-polymerize 0.4 g of vinyltriethoxysilanized silica gel and 0.46 mg of 1-vinyl-3-butylimidazolium bromide ionic liquid at room temperature for 4 h, then add the cross-linking agent ethylene glycol Dimethacrylate and azobisisobutyronitrile are initiators, in which 1-vinyl-3-butylimidazolium bromide ionic liquid, crosslinking agent ethylene glycol dimethacrylate and initiator azobisisobutyronitrile The molar ratio of butyronitrile is 4:15:0.06, and the product obtained by heat-initiated polymerization at 70°C for 24h is extracted by Soxhlet with methanol / acetic acid (V / V=9:1) mixed solution for 48h, then washed with methanol and placed at 60°C Vacuum drying to obtain ionic liquid functionalized silica gel.

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Abstract

The invention discloses an application of ionic liquid functionalized silica gel in removing phenolic pollutants in waste water, belonging to the technical field of industrial waste water treatment. The key points of the technical scheme of the present invention are: the application of ionic liquid functionalized silica gel in the removal of phenolic pollutants in wastewater, and the specific steps are: adding ionic liquid functionalized silica gel to phenolic pollutant wastewater and standing at room temperature for 1 hour to realize the removal of phenolic pollutants. Adsorption of phenolic pollutants in wastewater, and then the ionic liquid functionalized silica gel after adsorption is separated, and the mixed solution of methanol / water / acetic acid is added to the separated ionic liquid functionalized silica gel, and then soaked at room temperature for 1 hour, cleared Liquid separation, repeated soaking 3 times, washing and drying to obtain regenerated ionic liquid functionalized silica gel, which can be reused for the adsorption of phenolic pollutants in wastewater. The ionic liquid functionalized silica gel prepared by the invention has high adsorption efficiency for phenolic pollutants in industrial wastewater, large adsorption capacity and is easy to regenerate and recycle.

Description

technical field [0001] The invention belongs to the technical field of industrial waste water treatment, and in particular relates to the application of an ionic liquid functionalized silica gel in removing phenolic pollutants in waste water. Background technique [0002] The difficult-to-remove and highly toxic pollutants in industrial wastewater and various polluted water bodies have a great impact on the water environment. These pollutants not only have complex components, large content fluctuations, and poor biodegradability. Therefore, the prevention and control of their pollution has become an environmental discipline. Hotspots and difficulties in field research. Phenolic compounds are one of the main organic pollutants in the water environment. As protoplasmic poisons, they have toxic effects on humans and other organisms. They can not only coagulate proteins, but long-term drinking of water polluted by phenolic pollutants can cause chronic accumulation. Sex poisonin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/28B01J20/22C02F101/34
Inventor 朱桂芬王莉郑立庆苏现伐张霞于文娜王培云樊静
Owner HENAN NORMAL UNIV