A kind of method of graphene oxide composite algae removal

A graphene composite, graphene technology, applied in chemical instruments and methods, water/sludge/sewage treatment, adsorbed water/sewage treatment, etc., can solve the problems of increasing the cost of algae removal methods, and achieve easy adsorption, high Specific surface area, uniform dispersion effect

Inactive Publication Date: 2016-11-30
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention aims to solve the problem that the existing algae removal method leads to the increase of dissolved organic carbon DOC in water and the high cost of the existing algae removal method in the algae removal process

Method used

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  • A kind of method of graphene oxide composite algae removal
  • A kind of method of graphene oxide composite algae removal
  • A kind of method of graphene oxide composite algae removal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A compound algae removal method, the method comprises the following steps:

[0031] (1) Ultrasonicate 100 mg / L graphene oxide in 100 mL distilled water for 30 min as nanomaterial storage solution.

[0032] (2) Copper sulfate algaecide is formulated into a solution, and then graphene oxide is added to control the concentration of graphene oxide.

[0033] (3) Prepare 18 parts of the same Anabaena, each 100mL, OD680 between 0.3 and 0.5, add the mixed solution prepared in step (2), and meet the requirements of Cu in the solution by adding different amounts of copper sulfate algicide. 2+ When the concentration is 0, 0.05, 0.10, 0.15, 0.20, 0.30 mg / L respectively, the graphene oxide concentration is controlled to be 0, 0.8, 2.0 mg / L.

[0034] (4) After stirring, the flocs in the solution can be separated.

[0035] Graphene oxide added to algae liquid can be adsorbed on the surface of algae cells. When a small amount of nanometer graphene oxide and heavy metal ions coexist i...

Embodiment 2

[0038] (1) Ultrasonicate 100 mg / L graphene oxide in 100 mL distilled water for 30 min as nanomaterial storage solution.

[0039] (2) The cadmium chloride algicide is formulated into a solution, and then graphene oxide is added to control the concentration of graphene oxide.

[0040] (3) Prepare 20 parts of the same Microcystis aeruginosa, each 100 mL, OD680 between 0.1 and 0.2, add the mixed solution prepared in step (2), and meet the requirements of the solution by adding different amounts of cadmium chloride algaecide. Cd 2+ When the concentration is 0, 0.2, 0.4, 0.5, 0.7mg / L, the concentration of graphene oxide is controlled to 0, 1.0, 5.0, 10.0mg / L respectively;

[0041](4) After stirring, the flocs in the solution can be separated.

[0042] The effect of graphene oxide alone on Microcystis aeruginosa Figure 5 , Microcystis aeruginosa on Cd alone 2+ The scanning electron microscope photos under the action are as follows Image 6 , Microcystis aeruginosa in Cd 2+ The...

Embodiment 3

[0045] (1) Ultrasonicate 100 mg / L graphene oxide in 100 mL distilled water for 30 min as nanomaterial storage solution.

[0046] (2) Copper sulfate algaecide is formulated into a solution, and then graphene oxide is added to control the concentration of graphene oxide.

[0047] (3) Prepare 21 copies of the same Microcystis aeruginosa, 100mL each, with OD680 between 0.3 and 0.4, add the mixed solution prepared in step (2), and meet the requirements of Cu in the solution by adding different amounts of copper sulfate algaecides. 2+ When the concentration is 0, 0.02, 0.05, 0.08, 0.1, 0.15, 0.2mg / L, the concentration of graphene oxide is controlled to 0, 2.0, 5.0mg / L respectively;

[0048] (4) After stirring, the flocs in the solution can be separated.

[0049] Different concentrations of graphene oxide in different Cu 2+ The influence on the concentration of Microcystis aeruginosa under the condition of concentration is as follows Figure 10 As shown, different concentrations o...

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Abstract

The invention relates to a composite algae removal method for graphene oxide. The composite algae removal method comprises the following steps: (1) adding a CuSO4 or CdCl2 algae removal into a solution containing blue algae, and controlling the Cu<2+> concentration in the solution to be 0.05-0.10mg / L or controlling the Cd<2+> concentration in the solution to be 0.4-0.7mg / L; (2) adding graphene oxide into the solution, controlling the concentration of the graphene oxide to be 0.8-10mg / L, and separating floc in the solution after stirring, thereby completing algae removal. Compared with the prior art, the graphene oxide is added and can be adsorbed on the surfaces of algae cells, so that heavy metals in water can be enriched by a nano material when a little nano graphene oxide and the heavy metal ions co-exist in water, and the algae removal efficiency of the heavy metals is greatly improved.

Description

technical field [0001] The invention relates to the field of water treatment, in particular to a graphene oxide compound algae removal method. Background technique [0002] In recent years, cyanobacteria pollution incidents have occurred frequently, and cyanobacteria outbreaks have caused serious impacts on water bodies. First, industrial wastewater, domestic sewage, and agricultural retreat water containing nutrients such as nitrogen and phosphorus enter the water body in large quantities, resulting in eutrophication of the water body. Algae blooms in large numbers, the transparency of water decreases, and sunlight is difficult to penetrate the water layer, which affects the photosynthesis of plants in the water and reduces the dissolved oxygen in the water. Pollution of drinking water sources interferes with flocculation, clogs filters, increases organic matter in water, and affects water treatment processes; moreover, algae and their metabolites are one of the important ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/28C02F1/50C02F1/62C02F1/52
CPCY02W10/37
Inventor 唐玉霖田景林杜建芬
Owner TONGJI UNIV
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