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
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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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