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Method for preparing nano active carbon spheres by using blue-green algae residue

A technology of activated carbon spheres and cyanobacteria residues, applied in nanotechnology, nanotechnology, nanostructure manufacturing, etc., can solve the problems of infeasibility and high cost, achieve simple operation, eliminate hazards and pollution, and avoid high energy consumption Effect

Active Publication Date: 2012-06-27
INST OF PLASMA PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
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Problems solved by technology

However, the conversion ratio of cyanobacteria to biodiesel accounts for 50% of its weight. Some companies try to produce cyanobacteria in plastic tents, which is expensive, and open-air planting is the only option to reduce costs.
However, the cyanobacteria salvaged from Taihu Lake contain less lipids, only 0.26%, and it is not feasible to extract oil from cyanobacteria to make biodiesel

Method used

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  • Method for preparing nano active carbon spheres by using blue-green algae residue
  • Method for preparing nano active carbon spheres by using blue-green algae residue

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Embodiment Construction

[0021] The method for preparing nano-activated carbon spheres by using cyanobacteria algae dregs:

[0022] 1. Collect algal residues, including air-floated algal residues, coagulated algal residues or artificially salvaged algal residues;

[0023] 2. Air-dry the algae dregs naturally or at 50-100 degrees until the water content is 5-10%, crush them into powder, and pass through a 150-200 mesh sieve;

[0024] 3. Mix the algae residue powder and phosphoric acid with a mass concentration of 40-60% according to the mass ratio of 1:2.5, and soak for 2-10 hours;

[0025] 4. Put the soaked mixture into a muffle furnace for carbonization at 300-500°C for 60-120 minutes, then cool it down to room temperature naturally;

[0026] 5. Wash the carbonized algae residue with 1mol / L hydrochloric acid, deionized water, and absolute ethanol three times in sequence, then dry at 20-60°C, grind, and pass through a 200-mesh sieve to obtain a uniform diameter of 5-10nm. Activated carbon balls.

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Abstract

The invention discloses a method for preparing nano active carbon spheres by using blue-green algae residue. In the method, blue-green algae residue is ground into powder, rich holes are formed in the blue-green algae residue biomass by phosphorylation, and the powder are carbonized to form the nano active carbon spheres. The method is simple in preparation process, environmentally-friendly and stable in product performance, and is used in fields of environment protection, lubricating and radiation additive and the like. In the preparation process, algae toxins are decomposed efficiently to eliminate the harmfulness of the algae toxins; and the algae residue is a high-pollution material with higher absorption capacity and is widely available, stable in performance and easy to recover.

Description

technical field [0001] The invention relates to the field of bio-environmental protection materials, in particular to a method for preparing nano-activated carbon spheres by using cyanobacteria algae dregs. Background technique [0002] With the acceleration of urban industrialization and increasing environmental pollution, harmful cyanobacterial blooms caused by eutrophication have become an environmental problem of widespread concern at home and abroad. Nutrient-rich lakes and reservoirs contain a large amount of algae, generally tens of thousands to tens of millions of algae per liter. Generally, physical and chemical methods are used to take emergency measures when a large number of blue-green algae outbreaks occur, such as manual salvage, mechanical salvage, coagulation sedimentation, coagulation air flotation, etc., but the same problem is brought about when blue-green algae are fished out. , how to deal with or dispose of these highly polluting algae residues. At th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/08B82B3/00
Inventor 张宏唐义蔡冬清刘夏楠王相勤余增亮吴跃进李军
Owner INST OF PLASMA PHYSICS CHINESE ACAD OF SCI
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