Preparation method of oxidized graphene and sodium alginate composite absorbing material capable of removing ciprofloxacin in aqueous solution

Abstract

The invention provides a preparation method of an oxidized graphene and sodium alginate composite absorbing material capable of removing ciprofloxacin in an aqueous solution. The preparation method comprises the following steps: dispersing a certain amount of oxidized graphene samples in deionized water, putting the oxidized graphene samples into an ultrasonic cleaner, and performing ultrasonic treatment for 6-10 hours; dissolving a certain amount of sodium alginate into an oxidized graphene solution subjected to ultrasonic treatment, and performing ultrasonic treatment for 20 minutes; dropewise adding the mixed solution into a 0.2mol / L calcium chloride solution by virtue of a peristaltic pump, soaking for 1-3 days, and cleaning with deionized water for 3-4 times, thereby obtaining a sodium alginate and oxidized graphene sphere hydrogel material; and freeze-drying, thereby obtaining oxidized graphene and sodium alginate sphere aerogel. The preparation method is performed under a relatively mild condition, and oxidized graphene is packaged in a sodium alginate network structure by an ion bridge method, so that the nano toxicity of graphene powder is avoided, and a new nano material capable of efficiently absorbing ciprofloxacin antibiotics in the aqueous solution is prepared. The preparation process is simple, easily controllable in condition, low in cost and suitable for large-scale batch production.

Description

[technical field]

[0001] The invention belongs to the field of nanomaterials and environmental science and technology, in particular to a preparation method of a graphene oxide sodium alginate composite adsorption material for removing ciprofloxacin in an aqueous solution. [Background technique]

[0002] Antibiotics are the fermentation products of microorganisms, which can inhibit or kill the growth of specific microorganisms. Antibiotics are used in human body, animal husbandry, beekeeping, aquaculture, agriculture, etc. However, antibiotics are refractory substances. While bringing great benefits to human civilization, there will be more or less losses in the process of their manufacture, transportation and use, and the low utilization rate will cause a large number of antibiotic pollutants to enter In the water environment, it causes serious pollution to the water environment, destroys the ecosystem, and endangers human health.

[0003] Therefore, antibiotics have been...