Method for preparing bifunctional adsorption material based on organic matter alum-removal waste residue
A technology for adsorbing materials and organic matter, which is applied in chemical instruments and methods, adsorbed water/sewage treatment, water pollutants, etc. Promotion and application, low price, low price effect
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Embodiment 1
[0031] 1) Take 10 g of waste residue (referred to as waste residue) after the experiment of removing alum by organic matter, add 100 mL of deionized water, stir at a speed of 200 r / min for 2 h, then add 200 mL of ethanol, and stir at a speed of 200 r / min for 1.5 h, standing overnight.
[0032] 2) Filter the product obtained in step 1) to obtain filtrate (containing soluble vanadium, iron, aluminum, etc.) and solid filter cake (containing carbon and TiO 2 ); under stirring, a peristaltic pump was used to add sodium hydroxide solution (mass concentration: 20%) to the filtrate at a drop rate of 20d / m, adjust the pH to 10, and collect the reaction precipitate under nitrogen protection.
[0033] 3) The solid filter cake collected in step 2) and the precipitate formed in the filtrate treated with sodium hydroxide were subjected to low-temperature freeze-drying treatment (at a temperature of -40°C) to constant weight, and concentrated hydrochloric acid (mass concentration of 20%) an...
Embodiment 2
[0037]1) Take 10 g of waste residue (referred to as waste residue) after the experiment of removing alum by organic matter, add 100 mL of deionized water, stir at a speed of 200 r / min for 2 h, then add 200 mL of ethanol, and stir at a speed of 200 r / min for 1.5 h, standing overnight.
[0038] 2) Filter the product obtained in step 1) to obtain filtrate (containing soluble vanadium, iron, aluminum, etc.) and solid filter cake (containing carbon and TiO 2 ); under stirring, a peristaltic pump was used to add sodium hydroxide solution (mass concentration: 20%) to the filtrate at a drop rate of 20d / m, adjust the pH to 10, and collect the reaction precipitate under nitrogen protection.
[0039] 3) The solid filter cake collected in step 2) and the precipitate formed in the filtrate treated with sodium hydroxide were subjected to low-temperature freeze-drying treatment (at a temperature of -40°C) to constant weight, and concentrated hydrochloric acid (mass concentration of 20%) and...
Embodiment 3
[0043] 1) Take 10 g of waste residue (referred to as waste residue) after the experiment of removing alum by organic matter, add 100 mL of deionized water, stir at a speed of 200 r / min for 2 h, then add 200 mL of ethanol, and stir at a speed of 200 r / min for 1.5 h, standing overnight.
[0044] 2) Filter the product obtained in step 1) to obtain filtrate (containing soluble vanadium, iron, aluminum, etc.) and solid filter cake (containing carbon and TiO 2 ); under stirring, a peristaltic pump was used to add sodium hydroxide solution (mass concentration: 20%) to the filtrate at a drop rate of 20d / m, adjust the pH to 10, and collect the reaction precipitate under nitrogen protection.
[0045] 3) The solid filter cake collected in step 2) and the precipitate formed in the filtrate treated with sodium hydroxide were subjected to low-temperature freeze-drying treatment (at a temperature of -40°C) to constant weight, and concentrated hydrochloric acid (mass concentration of 25%) an...
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