Preparation method of coated type muscovado sugar modified nano-iron groundwater remediation agent

A groundwater remediation and nano-iron technology, which is applied in the direction of contaminated groundwater/leachate treatment, chemical instruments and methods, water pollutants, etc., can solve problems such as easy agglomeration and loss of surface activity, and achieve low cost and convenience The effect of simple construction operation and preparation process

Inactive Publication Date: 2016-11-16
陈建峰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The groundwater remediation agent prepared by the present invention takes nano-iron as the functional core, modifies its surface with sucrose, improves the dispersibility of nano-iron, solves the problem of easy agglomeration and agglomeration of traditional nano-iron materials, and uses acrylic resin to modify The non-toxic nano-iron coating avoids its direct contact with the air, and makes up for the defects that the nano-iron is directly exposed to the air, spontaneously ignites, oxidizes when exposed to air, forms an iron oxide film on the surface and loses surface activity. It is a new type of high-efficiency groundwater Restorative agent with broad application prospects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0020] Weigh 25g of ferrous sulfate, 5g of polyethylene glycol and 10g of brown sugar and dissolve in 400mL of ethanol with a mass concentration of 20%, stir evenly to obtain a mixed solution and put it into a three-necked flask with a stirrer, mix the obtained mixed solution with 200mL concentration Move the 0.05mol / L potassium borohydride solution into the glove box; pass argon gas into the box at a rate of 10mL / min until all the air in the box is replaced, start the stirrer to stir the mixed solution at a speed of 1500r / min, and in the stirring state Add the above-mentioned potassium borohydride solution dropwise, control the rate of addition to complete the dropwise addition within 40 minutes, and continue to stir and react for 30 minutes; after the reaction is completed, filter to obtain a black solid filter residue, which is washed 3 times with deoxygenated deionized water and deoxygenated absolute ethanol respectively. Move it into an oven, and dry at 105°C for 1 hour un...

example 2

[0023]Weigh 28g of ferrous sulfate, 5g of polyethylene glycol and 11g of brown sugar and dissolve them in 450mL of ethanol with a mass concentration of 20%. Move the 0.05mol / L potassium borohydride solution into the glove box; pass argon gas into the box at a rate of 10mL / min until all the air in the box is replaced, start the stirrer to stir the mixed solution at a speed of 1800r / min, and in the stirring state Add the above potassium borohydride solution drop by drop, control the rate of addition so that the dropwise addition is completed within 50 minutes, and continue to stir for 35 minutes; after the reaction is completed, filter to obtain a black solid filter residue, which is washed 4 times with deoxygenated deionized water and deoxygenated absolute ethanol respectively. Move it into an oven, and dry at 108°C for 1 hour under the protection of nitrogen to obtain brown sugar modified nano-iron powder, which is placed in a brown bottle and sealed for storage; weigh 6g of th...

example 3

[0026] Weigh 30g of ferrous sulfate, 6g of polyethylene glycol and 12g of brown sugar and dissolve them in 500mL of ethanol with a mass concentration of 20%, stir evenly to obtain a mixed solution and put it into a three-necked flask with a stirrer, and mix the obtained mixed solution with a concentration of 300mL Move the 0.05mol / L potassium borohydride solution into the glove box; pass argon gas into the box at a rate of 10mL / min until all the air in the box is replaced, start the stirrer to stir the mixed solution at a speed of 2000r / min, and in the stirring state Add the above potassium borohydride solution drop by drop, control the dropping speed so that the dropwise addition is completed within 40 to 60 minutes, and continue to stir and react for 40 minutes; after the reaction is completed, filter to obtain a black solid filter residue, which is washed with deoxygenated deionized water and deoxygenated absolute ethanol for 5 transfer to an oven, and dry at 110°C for 2 hou...

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Abstract

The invention relates to a preparation method of a coated type muscovado sugar modified nano-iron groundwater remediation agent and belongs to the field of groundwater remediation. According to the preparation method, firstly, a nano-iron material is modified with muscovado sugar, then the modified nano-iron surface is coated with a polymer film layer with an emulsion polymerization method, and the coated type muscovado sugar modified nano-iron groundwater remediation agent is prepared. According to the prepared groundwater remediation agent, nano-iron is taken as a functional core, the nano-iron surface is modified with the muscovado sugar, so that the dispersity of nano-iron is improved, and the problem that a traditional nano-iron material is prone to agglomeration is solved; modified nano-iron is coated with acrylic resin and is prevented from being directly contacted with air accordingly, the defects that nano-iron combusts spontaneously due to direct exposure to the air and is oxidized when contacted with the air, and surface activity is damaged because of generation of an iron oxide film on the surface are overcome, and the coated type muscovado sugar modified nano-iron groundwater remediation agent is a novel and efficient groundwater remediation agent and has broad application prospect.

Description

technical field [0001] The invention relates to a preparation method of a coated black sugar modified nano-iron groundwater restoration agent, which belongs to the field of groundwater restoration. Background technique [0002] Nitrates and organic chlorides are currently the main pollutants in groundwater. Because nitrate in water can directly or indirectly endanger human health; organic halides are highly toxic and difficult to biodegrade environmental pollutants, and traditional treatment technologies have shortcomings such as incomplete degradation and low efficiency. The development of nanotechnology has brought a new and promising method for the treatment of pollutants. Nanomaterials have the characteristics of small particle size (1-100nm), large specific surface area, and high surface activity, which can quickly remove organic matter, heavy metals and Inorganic nutrients and other pollutants can be directly injected into the aquifer to achieve in-situ remediation, s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/70C02F101/12C02F101/36C02F103/06
CPCC02F1/705C02F2101/12C02F2101/36C02F2103/06
Inventor 陈建峰林茂平
Owner 陈建峰
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