Application of bentonite-supported nanoscale zero-valent iron in three-dimensional electrode technology, paper-making wastewater treatment method and particle electrode preparation method
A nano-zero-valent iron and three-dimensional electrode technology, which is applied in processing wastewater treatment, water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of high cost, narrow application scope and limited application of papermaking wastewater treatment. , to achieve the effect of easy large-scale promotion, low price and good treatment effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0045] Preparation of bentonite-supported nano zero-valent iron (B-nZVI):
[0046] Step A: get 4.84g ferric chloride hexahydrate (FeCl 3 ·6H 2 0) Dissolve in 50mL deionized water and pure ethanol mixed solution (the volume ratio of ethanol and water is 4:1), add 1g of bentonite, and stir electrically for 10min in a nitrogen-filled environment;
[0047] Step B: Mix 100mL, 0.93mol·L -1 NaBH 4 Drop into the mixture at a rate of 1-2 drops per second, and then vigorously stir in a nitrogen-filled environment. The color of the mixed solution changed from reddish brown to light yellow, and finally turned black. At the same time, more and more black particles were produced in the mixed solution in the three-necked bottle. NaBH 4 After the dropwise addition, the mixture was continuously stirred for 20 min under the condition of nitrogen protection to ensure that the reaction was uniform and thorough.
[0048] Step C: After the reaction is completed, use magnetic suction, place th...
Embodiment 2
[0051] Preparation of sodium bentonite (Na-bent):
[0052] (1) Take 50g of bentonite (calcium base), put it into a three-necked flask (500mL), add 200mL of Na 2 CO 3 (1mol·L -1 ) solution, stirred and reacted for two hours at 55°C and then stood still for two hours.
[0053] (2) Then add 100mL of Na 2 CO 3 (1mol·L -1 ) solution, stirred and reacted at 55°C for two hours and then stood still for two hours, repeating this twice.
[0054] (3) After the reaction was completed, it was left to stand for 1 day, filtered, washed, dried at 80°C, and finally stored at 105°C, activated for two days, and ground through a 200-mesh sieve to obtain Na-bent.
Embodiment 3
[0056] Preparation of nanometer zero valent iron (nZVI)
[0057] (1) 4.84g ferric chloride hexahydrate (FeCl 3 ·6H 2 O) Dissolve in 50mL deionized water and pure ethanol mixed solution (volume ratio of ethanol and deionized is 4:1), pour into a three-necked flask, and stir for 10min under nitrogen.
[0058] (2) 100mL of 0.93M NaBH 4 Add it dropwise to a three-neck flask, stir vigorously and fill with nitrogen to prevent oxidation. to ensure an adequate response. The color of the mixture changed from reddish brown to light yellow and finally to black. At the same time, more and more black particles were produced in the mixed solution in the three-necked bottle. After the dropwise addition was completed, stir at normal speed for another 20 min.
[0059] (3) After the stirring is completed, the magnet will be attracted, and the magnet will be placed at the bottom of the bottle, so that the product will gather at the bottom of the bottle, and wait until it is completely sepa...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More