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Preparation method of alga biological adsorbent

A biosorbent, algae technology, applied in chemical instruments and methods, alkali metal compounds, alkali metal oxides/hydroxides, etc., can solve the problems of slow growth, long treatment period, and speed up heavy metal adsorption, and achieve the effect. Good, speed up the adsorption speed, the effect of large adsorption capacity

Inactive Publication Date: 2016-05-11
雷春生
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem mainly solved by the present invention: it takes 3 to 4 hours or longer for general biosorbents to achieve the desired effect. If live algae are used for treatment, they are easily affected by toxic elements in sewage, and the growth is inhibited, so the growth is slow. , to deal with the problem of long cycle time, a preparation method of algae biosorbent is provided. In the present invention, the algae are first physically processed, dried and crushed, and then chemically treated to remove the impurities adsorbed on the algae. The seaweed is deactivated, and then mixed with the modified activated sludge, and coated on the surface of the particles by carbonization to obtain a biosorbent that can treat heavy metal wastewater. The dead algae used in the present invention have more internal cells due to more broken cell walls. The functional group is exposed to combine with metal ions, which has a better effect on the treatment of heavy metal wastewater, and can be reused, and the addition of activated sludge increases the adsorption capacity and speeds up the adsorption of heavy metals

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0023] First, take 100g Scenedesmus obliques, 80g green microalgae, and 150g Sargassum seaweed, wash the surface twice with clean water, then put them in the sun for 2 days, and then dry them in a constant temperature oven at 80°C for 6 hours. After drying, take it out and put it into a pulverizer to pulverize, sieve, and screen out 100-mesh algae powder; take 150g of the powder, add deionized water to it at a solid-to-liquid mass ratio of 1:3, and ultrasonically disperse it with an ultrasonic disperser for 5 minutes. After dispersion, add nitric acid solution with a mass fraction of 35% dropwise to adjust the pH value to 3, then add 15mL of formaldehyde to it, stir at room temperature for 20min, and then let it stand for 3h. Wash once with distilled water, sodium carbonate with a mass fraction of 5%, and distilled water, and then put them in a constant temperature drying oven and dry at 60°C for 5 hours to obtain the modified algae powder; take 150g of sludge and add it to the...

example 2

[0026] First, take 150g of Scenedesmus obliques, 100g of green microalgae, and 250g of sargassum seaweed, wash the surface twice with clean water, then put them in the sun for 2 days, and then dry them in a constant temperature oven at 85°C 7h, after drying, take it out and put it into a pulverizer to pulverize, sieve, and screen out 150-mesh algae powder; take 200g of the above-mentioned powder, add deionized water to it according to the solid-liquid mass ratio of 1:3, and use an ultrasonic disperser Ultrasonic dispersion was carried out for 6 minutes, and after dispersion, nitric acid solution with a mass fraction of 37% was added dropwise to the suspension to adjust the pH value to 3.5, and then 17 mL of formaldehyde was added to it, stirred at room temperature for 25 minutes and then left to stand for 3.5 hours. The mixture was vacuum filtered, and the obtained filter residue was washed twice with distilled water, sodium carbonate with a mass fraction of 5%, and distilled w...

example 3

[0030] First, take 200g of Scenedesmus obliques, 120g of green microalgae, and 300g of sargassum seaweed, wash the surface with clean water for 3 times, then put them in the sun for 3 days, and then put them in a constant temperature oven at 90°C to dry 8h, after drying, take it out and put it into a pulverizer to pulverize, sieve, and screen out 200-mesh algae powder; take 250g of the above-mentioned powder, add deionized water to it according to the solid-liquid mass ratio of 1:3, and use an ultrasonic disperser Ultrasonic dispersion was carried out for 8 minutes. After dispersion, nitric acid solution with a mass fraction of 40% was added dropwise to the suspension to adjust the pH value to 4. Then 20 mL of formaldehyde was added to it, stirred at room temperature for 30 minutes and then allowed to stand for 4 hours. The liquid was subjected to vacuum filtration, and the obtained filter residue was washed three times with distilled water, sodium carbonate with a mass fractio...

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Abstract

The invention discloses a preparation method of an alga biological adsorbent, belonging to the field of adsorbents. The preparation method comprises the steps of: firstly carrying out physical processing of drying and pulverizing on algae, then carrying out chemical treatment to remove impurities adsorbed to the algae, deactivating the algae under high temperature and strong acid conditions, mixing with modified activated sludge, and carrying out carbonization coating to obtain the biological adsorbent, which can be used for treating heavy metal wastewater, on the surfaces of particles. According to the preparation method, dead algae have more broken cell walls, and more internal functional groups are exposed to be combined with metal ions, so that the effect for treating the heavy metal wastewater is better; the adsorbent can be recycled; in addition, the activated sludge is added, so that the adsorption capacity is increased and the adsorption speed to heavy metals can be increased.

Description

technical field [0001] The invention discloses a preparation method of an algae biosorbent, which belongs to the field of adsorbents. Background technique [0002] Biosorption is a method of enriching and separating heavy metal ions from aqueous solution by using microorganisms. All organisms and their derivatives that have the ability to enrich heavy metals from solution are called biosorbents. The biosorbents in the natural environment are mainly derived from bacteria and algae, such as some bacteria, fungi, yeast, algae, higher plants and derivative products obtained from these organisms. These biosorbents have been found to have good selectivity for some heavy metal ions. The large amount of waste mycelium in the industrial fermentation process has also attracted people's attention. In addition, rich marine biological resources also provide a basis for the development of algae biosorbents. [0003] Algae have a strong adsorption capacity for most heavy metals. The a...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/28
CPCB01J20/20B01J20/28016B01J2220/4843B01J2220/4887
Inventor 雷春生王志慧
Owner 雷春生
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