Method used for treating high concentration ammonia nitrogen in metallurgical waste water
A high-concentration, wastewater technology, applied in the field of high-concentration ammonia nitrogen, can solve problems such as secondary pollution of the environment, and achieve the effects of strong pertinence, high removal rate and low cost
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example 1
[0029] First weigh 4.8g of magnesium nitrate, 4.2g of aluminum nitrate, and 5.5g of ferric nitrate and dissolve them in 220ml of absolute ethanol solution containing 3.6g of urea, stir at room temperature for 1h, pour into a hydrothermal reaction kettle and heat to 140°C, and react 13h, cooled to room temperature, washed three times with ethanol and deionized water, and then dried at 60°C for 6h to obtain nano-magnesium-aluminum-iron hydrotalcite; Soak in saturated potassium hydroxide solution for 8 hours, place in a muffle furnace, dry at a temperature of 105°C, and magnetize near a magnetic field; immerse the nano-magnesium aluminum iron hydrotalcite material after pickling, alkali leaching and magnetization in 1g of oxaloacetic acid , 2g potassium oxalate and 7g stearyl acrylate, stir for 25min; wash the modified nano-magnesium aluminum iron hydrotalcite material with deionized water 3 times, and dry it under nitrogen protection; calcined at 800°C for 4h ; The prepared orga...
example 2
[0031]First weigh 8.1g of magnesium nitrate, 5.8g of aluminum nitrate, and 9.7g of ferric nitrate and dissolve them in 310ml of absolute ethanol solution containing 5.3g of urea, stir at room temperature for 1h, pour into a hydrothermal reaction kettle and heat to 140°C, and react 14h, cooled to room temperature, washed three times with ethanol and deionized water, and then dried at 60°C for 6h to obtain nano-magnesium-aluminum-iron hydrotalcite; Soak in saturated potassium hydroxide solution for 8 hours, place in a muffle furnace, dry at a temperature of 105°C, and magnetize near a magnetic field; immerse the nano-magnesium aluminum iron hydrotalcite material after pickling, alkali leaching and magnetization in 6g of oxaloacetic acid , 8g of potassium oxalate and 6g of stearyl acrylate, stirred for 40min; the modified nano-magnesium aluminum iron hydrotalcite material was washed 3 times with deionized water, dried under nitrogen protection conditions; calcined at a temperature...
example 3
[0033] First, weigh 10.3g of magnesium nitrate, 7.5g of aluminum nitrate, and 13.9g of ferric nitrate and dissolve them in 380ml of absolute ethanol solution containing 7.2g of urea, stir at room temperature for 1h, pour into a hydrothermal reaction kettle and heat to 140°C, and react 15h, cooled to room temperature, washed three times with ethanol and deionized water, and dried at 60°C for 6h to obtain nano-magnesium-aluminum-iron hydrotalcite; Soak in saturated potassium hydroxide solution for 8 hours, place in a muffle furnace, dry at a temperature of 105°C, and magnetize near a magnetic field; immerse the nano-magnesium aluminum iron hydrotalcite material after pickling, alkali leaching and magnetization in 12g of oxaloacetic acid , 8g potassium oxalate and 20g stearyl acrylate, stir for 65min; wash the modified nano-magnesium aluminum iron hydrotalcite material with deionized water 3 times, and dry it under nitrogen protection; calcined at 900°C for 6h ; The prepared orga...
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