Method for preparing absorptive reducing material

A dripping and solution technology, applied in the direction of reduced water/sewage treatment, adsorption water/sewage treatment, etc., can solve the problems of nano-iron easily oxidized particles, loss of function, loss of expansibility of sheets, etc., to improve hydrophobic performance, effective Conducive to microbial degradation, improve the effect of adsorption capacity

Inactive Publication Date: 2011-01-05
CHANGZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still problems such as easy oxidation and particle agglomeration in practical application of nano-iron.
Literature (Petrochemical Industry 2004 Volume 33 Supplement 123 pages) introduces a nano-reactor with montmorillonite interlayer, KBH 4 As a reducing agent, nano-iron / montmorillonite composite catalytic materials are prepared at room temperature, and the iron particles are highly dispersed and have narrow particle sizes; The interlamellar distance of bentonite is only 1.29nm, and the lamellar layer loses its expansibility due to the fixation of iron particles. Therefore, when it is applied to the treatment of organic pollutants in wastewater, the pollutants cannot be adsorbed and combined with nano Contact with zero valent iron, loses its intended role

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] At room temperature, FeCl with a volume of 1 L and a concentration of 0.8 mol / L 3 A total of 0.4 mol of Na was added dropwise to the solution 2 CO 3 Solution, keep stirring during the dropping process, continue to stir for 2.5h after the dropwise addition, and then age for 24h to obtain a hydroxyl iron pillar solution; in a water bath at 65°C, add 100mL of hydroxyl iron to the suspension containing 10g of calcium-based bentonite dropwise Iron pillar solution, stirring continuously during the dropping process, stirring under the same conditions at 65°C for 2.0h after the dropwise addition, aging at a constant temperature of 60°C for 24h, centrifuged, and washing the obtained solid with deionized water 5 times, The obtained solid was dried at 125° C. for 12 h to obtain inorganic pillared bentonite; the obtained inorganic pillared bentonite was mixed with 60 mL of toluene, 20 mmol of octadecyltrichlorosilane (Cl 3 Si(CH 2 ) 17 CH 3 ), reacted for 36 hours, filtered, a...

Embodiment 2

[0019] At room temperature, FeCl with a volume of 1 L and a concentration of 0.6 mol / L 3 A total of 0.3 mol of Na was added dropwise to the solution 2 CO 3 Solution, keep stirring during the dropwise addition, continue to stir for 2h after the dropwise addition, and then age for 24h to obtain a hydroxyl iron pillar solution; in a water bath at 60°C, add 50mL of hydroxyl iron dropwise to the suspension containing 10g of calcium-based bentonite Pillar solution, continuously stirred during the dropping process, stirred under the same conditions at 65°C for 3.0h after the dropwise addition was completed, aged at a constant temperature of 60°C for 24h, centrifuged, and the obtained solid was washed 4 times with deionized water to obtain The solid was dried at 95°C for 36 hours to obtain inorganic pillared bentonite; the obtained inorganic pillared bentonite was mixed with 60mL benzene, 20mmol trimethylchlorosilane (Cl 3 Si(CH 3 ) 3 ) mixed, reacted for 12 hours, filtered, and t...

Embodiment 3

[0022] At room temperature, FeCl with a volume of 1 L and a concentration of 0.6 mol / L 3 A total of 0.3 mol of Na was added dropwise to the solution 2 CO 3 Solution, keep stirring during the dropping process, continue to stir for 2.5h after the dropwise addition is completed, and then age for 24h to obtain a hydroxyl iron pillar solution; in a water bath at 60°C, add 50mL of hydroxyl iron pillar dropwise to the suspension containing 10g of sodium bentonite Iron pillar liquid, stirring continuously during the dropping process, stirring under the same conditions at 60°C for 2.0 hours after the dropping, aging at a constant temperature of 60°C for 24 hours, centrifuged, and washing the obtained solid with deionized water 4 times, The obtained solid was dried at 95°C for 36h to obtain inorganic pillared bentonite; the obtained inorganic pillared bentonite was mixed with 100mL acetone, 20mmol3 aminopropyl-triethoxysilane ((CH 3 CH 2 O) 3 CH 2 SiCH 2 CH 2 CH 2 NH 2 ) mixed,...

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Abstract

The invention discloses a method for preparing an absorptive reducing material, which comprises the following steps of: dropwise adding 0.3-0.4mol of Na2CO3 solution into an FeCl3 solution with the volume of 1L and the concentration of 0.6-0.8mol / L at room temperature for preparing iron carbonyl pillared liquid; dropwise adding 50-100mL of iron carbonyl pillared liquid into suspension containing 10g of bentonite in a water bath at 60-65 DEG C for preparing inorganic pillared bentonite; and finally, carrying out mixing reaction on the obtained inorganic pillared bentonite with 60-100mL of organic solvent and 5-20mmol of silylating reagent. With the bentonite used as a matrix, nano zero-valent iron is prepared among bentonite nano layers, which can be used for controlling water pollution, and the like; by introducing the silylating reagent among the bentonite layers, on one hand, the drainage performance of bentonite and the absorptive capability of organic matter are improved, on the other hand, the distance of the bentonite layers can be expanded; the nano zero-valent iron fully plays a role in fully touching adsorbed pollutants and performs the nano effect of rapidly converting the pollutants, and a converted organic product is beneficial to microbiological degradation.

Description

technical field [0001] The invention relates to environmental pollution control and restoration, in particular to a preparation method of a material that can be used for pollutant adsorption and reduction. Background technique [0002] Nano-metal particles have the characteristics of small size and large specific surface area, and exhibit many characteristics in catalysis, optics and electromagnetism. Therefore, their preparation and application research has become a hot spot of concern all over the world. Due to the very high specific surface energy of nanoparticles, it is easy to agglomerate into large particles during the preparation process, thus losing many excellent characteristics of nanoparticles. Using the confinement effect of nanoreactors to prepare highly dispersed metal nanoparticle composite catalytic materials can overcome the agglomeration of nanoparticles and promote the dispersion of particles. The layered structure of silicate minerals such as bentonite h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/70C02F1/28
Inventor 马建锋崔冰莹李定龙
Owner CHANGZHOU UNIV
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