Preparation method and tellurium extraction application of nano CeO2 particle loaded composite biomass membrane
A biomass and composite membrane technology, applied in the field of composite materials, can solve the problems of large labor input, complicated process flow, secondary pollution, etc., and achieve the effects of protecting the environment, improving extraction efficiency, and strong film formation
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Embodiment 1
[0030] (a) Cellulose extraction: A certain amount of sawdust was washed with deionized water and ethanol for 15 minutes respectively, and then dried at 80° C. for 24 hours. Take 2g of dried sawdust, add it to 200mL of 1% sodium hydroxide solution, and stir magnetically at 80°C for 4 hours. Then, the suspension is filtered and separated, and washed with deionized water until the pH value reaches neutral. Then, the rough cellulose tissue obtained by filtration and separation is added to a 1wt% sodium chloride solution, and the pH is adjusted with HCl solution value to 4, it was bleached under magnetic stirring at 80°C for 4h. Finally, the suspension is subjected to centrifugation, washed with deionized water to a neutral condition, and then dried at 80° C. to obtain wood cellulose.
[0031] (b) Preparation of cellulose membrane (CM): 0.8g of wood cellulose was added to 80mL of a mixed solution containing 3wt% sodium hydroxide and 5wt% urea, the temperature was adjusted to -12°C...
Embodiment 2
[0035] (a) Cellulose extraction: A certain amount of sawdust was washed with deionized water and ethanol for 15 minutes respectively, and then dried at 80°C for 24 hours. Take 10 g of dried sawdust, add to 200 mL of 3% sodium hydroxide solution, and stir magnetically at 80° C. for 4 hours. Then, the suspension is filtered and separated, and washed with deionized water until the pH value reaches neutral. Then, the rough cellulose tissue obtained by filtration and separation is added to a 3wt% sodium chloride solution, and the pH is adjusted with HCl solution value to 4, it was bleached under magnetic stirring at 80°C for 4h. Finally, the suspension is subjected to centrifugation, washed with deionized water to a neutral condition, and then dried at 80° C. to obtain wood cellulose.
[0036] (b) Preparation of cellulose membrane (CM): 2g of wood cellulose was added to 80mL of a mixed solution containing 5wt% sodium hydroxide and 7wt% urea, the temperature was adjusted to -12°C, ...
Embodiment 3
[0040] (a) Cellulose extraction: A certain amount of sawdust was washed with deionized water and ethanol for 15 minutes respectively, and then dried at 80°C for 24 hours. Take 40g of dried sawdust, add it into 200mL of 4% sodium hydroxide solution, and stir magnetically at 80°C for 4 hours. Then, the suspension was filtered and separated, and washed with deionized water until the pH value reached neutrality. Then, the rough cellulose tissue obtained by filtration and separation was added to 4wt% sodium chloride solution, and the pH was adjusted with HCl solution value to 4, it was bleached under magnetic stirring at 80°C for 4h. Finally, the suspension is subjected to centrifugation, washed with deionized water to a neutral condition, and then dried at 80° C. to obtain wood cellulose.
[0041] (b) Preparation of cellulose membrane (CM): 3g of wood cellulose was added to 80mL of a mixed solution containing 10wt% sodium hydroxide and 10wt% urea, the temperature was adjusted to ...
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