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Preparation method and application of algae-based magnetic activated carbon material

A magnetic activated carbon, algae-based technology, applied in chemical instruments and methods, alkali metal oxides/hydroxides, inorganic chemistry, etc., can solve the problems of complex preparation process, human health hazards, and unoptimistic conditions, and achieve rich sources. , low cost, good stability and adsorption performance

Inactive Publication Date: 2017-04-19
南京嘉美清丽环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation methods in these two patents need to be activated by adding alkaline earth metals or adjusting the pH, and further washing treatment is required after carbonization. The preparation process is more complicated and the cost is greatly increased.
[0003] At the same time, with the rapid economic development and the increasing scale of industrial production in recent years, a large amount of industrial wastewater, domestic sewage and agricultural irrigation water have been discharged into the lake, resulting in obvious eutrophication of the lake water body. Nitrogen, Phosphorus and other nutrients are seriously exceeded, eventually leading to frequent outbreaks of cyanobacteria blooms, which have a serious impact on people's production and life. When cyanobacteria cells rupture or die, toxins will be released into the water, mainly including liver toxins and neurotoxins. is a known toxin that attacks the liver and nerves, and poses a hazard to human health
Therefore, there is an urgent need to control lake cyanobacteria, but there are still many problems in the control of cyanobacteria, and the situation is not optimistic

Method used

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  • Preparation method and application of algae-based magnetic activated carbon material
  • Preparation method and application of algae-based magnetic activated carbon material
  • Preparation method and application of algae-based magnetic activated carbon material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1. Preparation of algae-based magnetic activated carbon material

[0035] The cyanobacteria collected from Lake Taihu are washed with tap water. Soak 1g of cyanobacteria in 30mL of 10mg / mL ferric ammonium oxalate solution for 18h, centrifuge and dry at 50℃ for 6h, then spread it in a crucible, put it in an atmosphere furnace, and carbonize at 800℃ under nitrogen protection 1h, and then naturally cooled to room temperature to obtain black powder, which is an algae-based magnetic activated carbon material.

[0036] The obtained algae-based magnetic activated carbon material was characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD), and its magnetic properties were reflected by the hysteresis curve. figure 1 This is the SEM image of the algae-based magnetic activated carbon material. by figure 1 It can be seen that Fe 3 O 4 The nanoparticles are distributed more evenly on the surface of the algae, and the pores are relatively obvious. figure ...

Embodiment 2

[0037] Example 2. Preparation of algae-based magnetic activated carbon material

[0038] The cyanobacteria collected from Lake Taihu are washed with tap water. Soak 0.5g of cyanobacteria in 6mL ferric chloride solution with a concentration of 5mg / mL for 12h, then dry at 30℃ for 4h, then spread it in a crucible, put it in an atmosphere furnace, and carbonize 0.5 at 500℃ under nitrogen protection h, then naturally cool to room temperature to obtain black powder, which is an algae-based magnetic activated carbon material.

[0039] The obtained algae-based magnetic activated carbon material was characterized by scanning electron microscope (SEM), and its magnetic size was reflected by the hysteresis curve. Figure 4 It is the SEM image of algae-based magnetic activated carbon material. by Figure 4 It can be seen that the Fe produced 3 O 4 Nanoparticles are few and small, and very few are loaded on the surface of algae. Figure 5 The hysteresis curve of the algae-based magnetic activa...

Embodiment 3

[0040] Example 3. Preparation of algae-based magnetic activated carbon material

[0041] The cyanobacteria collected from Lake Taihu are washed with tap water. Soak 2g of cyanobacteria in 60mL of 50mg / mL ferric nitrate solution for 24h, then dry at 80℃ for 8h, then spread it in a crucible, put it in an atmosphere furnace, carbonize at 900℃ for 2h under nitrogen protection, then Naturally cool to room temperature to obtain black powder, which is an algae-based magnetic activated carbon material.

[0042] The obtained algae-based magnetic activated carbon material was characterized by scanning electron microscope (SEM), and its magnetic size was reflected by the hysteresis curve. Image 6 This is the SEM image of the algae-based magnetic activated carbon material. by Image 6 It can be seen that the Fe produced 3 O 4 Nano particles are relatively large and large in size, and almost all cover the surface of the algae, and the pore distribution is not obvious. Figure 7 The hysteresis...

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Abstract

The invention discloses a method for preparing an algae base magnetic activated carbon material and the application of the algae base magnetic activated carbon material. According to the method, the preparing process and the magnetizing process of the activated carbon material are synchronized, a one-pot mode is adopted, drying, smashing, sieving and other preprocessing and activating processes are not needed, the steps of washing, drying and activator removing and the like are not needed after carbonization, a ferric salt solution is directly carbonized into ferroferric oxide nanometer particles in the preparing process, the ferroferric oxide nanometer particles are loaded to the surface of the activated carbon material, the operation is simple and easy to carry out, the preparing period is short, cost is low, mass production can be achieved, and due to the fact that the environmental pollutant of blue algae is utilized in the preparing process, dual environment benefits are achieved. The prepared algae base magnetic activated carbon material has large specific surface area and porosity, can efficiently adsorb methylene blue or methylene blue or bisphenol A in wastewater, has superparamagnetism and can be quickly separated from a liquid phase system after adsorption, and recycling is facilitated.

Description

Technical field [0001] The invention belongs to the field of environmental protection and comprehensive utilization of resources, and specifically relates to a preparation method for preparing algae-based magnetic activated carbon materials by using cyanobacteria as carbon-containing raw materials and loading ferroferric oxide nanoparticles through processes such as soaking and carbonization, and the prepared algae Based magnetic activated carbon materials and applications. Background technique [0002] Activated carbon is widely used in the field of adsorption due to its large specific surface area and porous structure. Although the advantages in adsorption are obvious, the mass use of activated carbon has been hindered due to some engineering problems, such as recycling problems and regeneration cost problems. Therefore, it is urgent to find a simple and feasible method to realize the rapid separation of activated carbon. If the activated carbon material can be endowed with m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28
Inventor 白雪华祖林禹露唐志强顾海鑫黄欣戴章艳
Owner 南京嘉美清丽环境科技有限公司
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