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Method for processing heavy metal ion in water using amidocyanogen modified Fe3O4@SiO2 composite microparticle

A technology of heavy metal ions and composite particles, applied in water/sewage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., to achieve the effects of convenient operation, remarkable treatment effect and low cost

Inactive Publication Date: 2009-03-18
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of amine modified Fe 3 o 4 @SiO 2 Application of Composite Particles in Removing Heavy Metal Ion Pollutants from Water

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Amino-modified Fe 3 o 4 @SiO 2 Synthesis of composite particles: Weigh 2 g of dried Fe 3 o 4 @SiO 2 Add the composite particles into a 250mL three-necked round-bottom flask, then add 50mL of toluene, and ultrasonically disperse for 15min. Press Fe 3 o 4 @SiO 2 The mass volume ratio of the composite particles to the silane reagent is 1:2 (g / mL), add 3-aminopropyl-trimethoxysilane, and reflux at 110°C for 12h. The reacted Fe 3 o 4 @SiO 2 The composite particles were washed several times with absolute ethanol and acetone. The washed Fe 3 o 4 @SiO 2 The composite particles were dried in an oven at 50°C for later use to obtain amine-modified Fe 3 o 4 @SiO 2 Composite particles.

[0026] Amino-modified Fe 3 o 4 @SiO 2 Composite particles are used as adsorbents to treat Cu containing heavy metal ions 2+ slightly polluted water. Adsorption is carried out in a closed container (volume 50mL), the mass ratio of adsorbent to slightly polluted water is 1:2500,...

Embodiment 2

[0028] Amino-modified Fe 3 o 4 @SiO 2 Synthesis of composite particles: weigh 1 g of dried Fe 3 o 4 @SiO 2 Add the composite particles into a 250mL three-necked round-bottomed flask, then add 30mL of toluene, and ultrasonically disperse for 10min. Press Fe 3 o 4 @SiO 2 The mass volume ratio of the composite particles to the silane reagent is 1:3 (g / mL), add 3-aminopropyl-triethoxysilane, and reflux at 110°C for 10h. Other treatment is the same as embodiment 1, obtains the Fe of amino modification 3 o 4 @SiO 2 Composite particles.

[0029] Amino-modified Fe 3 o 4 @SiO 2 Composite particles are used as adsorbents to treat heavy metal ions containing Ni 2+ slightly polluted source water. Adsorption condition is the same as embodiment 1, Ni 2+ 、Cd 2+ The initial concentration of Ni is 36.8mg / L and 30.7mg / L respectively, the adsorption temperature is 298K, the adsorption time is 24h, Ni 2+ 、Cd 2+ The removal rates were 47.3% and 85.7%.

Embodiment 3

[0031] Condition is the same as embodiment 1. The adsorption temperature is 298k, Ni 2+ The initial concentration of Cd is 46.0mg / L, and its out rate is 38.3%; Cd 2+ The initial concentration of is 40.9mg / L, and its elimination rate is 70.2%.

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Abstract

The invention discloses an application of Fe3O4@SiO2 composite particles modified by amido to removing heavy metal ion pollutants in waters. The invention also discloses a method of using the Fe3O4@SiO2 composite particles to remove heavy metal ion pollutants in waters. The Fe3O4@SiO2 composite particles are used to adsorb and remove heavy metal ions when the pH value is 4 to 8, the adsorption time is 30min to 24h and the temperature is 288 K to 318K. The application and the method adopt the Fe3O4@SiO2 composite particles to absorb and remove heavy metal ion pollutants in water and the composite particles represent relatively strong adsorption performance. Besides, the material of the application and the method is easy to prepare, the application and the method are convenient to operate, have low cost and obvious treatment effect and can adopt magnetic separation to carry out separation. Therefore, the application and the method are applied to remove heavy metal ions in micro-polluted water and have excellent economic and environmental benefits.

Description

technical field [0001] The invention belongs to the scope of separation of heavy metals in inorganic materials and water treatment technology, and mainly relates to the utilization of amine-based Fe with coordination function 3 o 4 @SiO 2 Application of composite particles in the treatment of heavy metal ions in slightly polluted water. Background technique [0002] With the rapid growth of human society's demand for heavy metal resources, a large amount of wastewater containing heavy metals is produced in the process of production, processing and use, such as industrial and mining enterprises, metallurgy, chemical industry, battery manufacturing, electroplating and other industrial industries. Production wastewater contains Heavy metals are discharged into water bodies and cause water pollution. Most metal ions are easily absorbed by suspended particles in the water and precipitate in the sediment layer at the bottom of the water, polluting the water body for a long time...

Claims

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Application Information

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IPC IPC(8): C02F1/62
Inventor 许昭怡王家宏郑寿荣刘凤玲李丽媛邵芸顾浩穆容心邢涛刘景亮赵瑞东
Owner NANJING UNIV
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