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Preparation method and application of composite microspheres

A technology of composite microspheres and grapefruit peel, applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc., to avoid secondary pollution, strong adsorption and regeneration ability, and good adsorption effect.

Inactive Publication Date: 2016-05-25
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It provides a new way for the selection of adsorbent materials, and at the same time solves the problems of waste resource management and adsorbent recycling and reuse.

Method used

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  • Preparation method and application of composite microspheres
  • Preparation method and application of composite microspheres

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Recover the waste pomelo peel, wash it with deionized water, air-dry it to constant weight, crush it with a plant grinder, weigh 30.0-60.0g of pomelo peel powder in a bottle filled with N 2 Pyrolysis in a muffle furnace with a heating rate of 15°C / min and a pyrolysis temperature of 500°C. After pyrolysis for 2 hours, cool to room temperature and take it out. Pass through a 100-mesh sieve to obtain carbonized pomelo peel powder.

[0020] Take 10.0-20.0g of carbonized pomelo peel powder, soak it in 1mol / L hydrochloric acid (V:m=20:1), place it at 25°C and 180rpm and shake it at a constant temperature for 12h, filter it, discard the filtrate, and use The ionized water was washed repeatedly until the pH value of the filtrate was 7.0, and then dried at 60°C to obtain pomelo peel biochar.

[0021] Weigh 4.0g chitosan powder and add it to 100mL volume fraction of 1% acetic acid solution to dissolve, then add 4.0g pomelo peel biochar into the chitosan solution and stir it in a ...

Embodiment 2

[0031] Adsorbed disperse dyes, PCP, Phe and Cr in embodiment 1 6+ The grapefruit peel biochar-chitosan composite microspheres were washed with deionized water until there was no residue on the surface, and then desorbed in 0.05mol / L NaOH solution for 3 times. After the desorption was complete, the microspheres were washed with deionized water until medium The regenerated pomelo peel biochar-chitosan composite microspheres were obtained and used repeatedly for the adsorption experiments of corresponding pollutants. Disperse dyes, PCP and Cr during regeneration adsorption 6+ The initial concentration used is 20 mg / L, Phe is 0.8 mg / L, and the rest of the experimental conditions are consistent with Example 1. When the regeneration times are up to 4 times, it still maintains a good removal effect on pollutants. Disperse Yellow 23, Disperse Orange 30 and Disperse Yellow 54, PCP, Phe and Cr 6+ The removal rates were 65.63%, 68.11%, 71.47%, 60.45%, 57.42% and 61.38%, respectively. ...

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Abstract

The invention provides a preparation method and an application of composite microspheres. Chitosan powder is added to an acetic acid solution to be dissolved, shaddock peel charcoal and a chitosan solution are added and mixed uniformly, the mixed solution is added to a NaOH solution, shaddock peel charcoal-chitosan composite microspheres are prepared, allowed to stand for 12 h and washed with deionized water until the shaddock peel charcoal-chitosan composite microspheres are neutral, and the composite microsphere are prepared. The prepared shaddock peel charcoal-chitosan composite microspheres are used for adsorbing pollutants in water. The invention provides the preparation method of the shaddock peel charcoal-chitosan composite microspheres and the application of the shaddock peel charcoal-chitosan composite microspheres in removal of disperse yellow dye, PCP, Phe and Cr<6+> in wastewater. By means of the prepared microspheres, the adsorption capacity and the recovery efficiency of shaddock peel charcoal are improved, the recovery cost is reduced, secondary pollution is avoided, and the composite microspheres are an environment-friendly adsorptive material capable of being repeatedly used.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a preparation method of pomelo peel biochar-chitosan composite microspheres and an application thereof. Background technique [0002] With the continuous development of industry and agriculture in my country, a large number of pollutants (such as dyes, PAHs, PCP, heavy metals, etc.) have entered water bodies, causing serious water pollution and exacerbating the shortage of available water resources in my country. PAHs, PCP, and heavy metals (hexavalent chromium) have strong "three-cause" effects (teratogenic, carcinogenic, and mutagenic), which seriously endanger human health and the aquatic ecological environment. Therefore, it is particularly important to remove these water pollutants. There are many kinds of wastewater treatment methods, which can be divided into physical methods (such as adsorption methods, etc.), chemical methods (chemical precipita...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F101/22C02F101/34
CPCB01J20/20B01J20/24C02F1/285C02F2101/22C02F2101/308C02F2101/345
Inventor 郎印海彭鹏王小梅谷英杰
Owner OCEAN UNIV OF CHINA
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