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Preparation method of composite adsorbent for removing methyl orange and fluoride ions in waste water

A composite adsorption and methyl orange technology, applied in chemical instruments and methods, adsorption of water/sewage treatment, water pollutants, etc., can solve problems such as fluorosis and susceptibility to dental plaque, and achieve the effect of improving the adsorption effect

Inactive Publication Date: 2017-07-28
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, long-term drinking of water with fluorine content > 1.0 mg / L is prone to dental plaque; long-term drinking of water with fluorine content > 4.0 mg / L can lead to bone fluorosis

Method used

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  • Preparation method of composite adsorbent for removing methyl orange and fluoride ions in waste water
  • Preparation method of composite adsorbent for removing methyl orange and fluoride ions in waste water
  • Preparation method of composite adsorbent for removing methyl orange and fluoride ions in waste water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Dissolve 1 g of polyvinyl alcohol in 19 g of deionized water, heat and stir to dissolve, to obtain a polyvinyl alcohol aqueous solution with a concentration of 5 wt%; add 3 g of aluminum nitrate to the polyvinyl alcohol aqueous solution, and then mix the polyvinyl alcohol / aluminum nitrate The composite solution was introduced into an autoclave, hydrothermally reacted at 140 °C for 4 h, taken out and then crushed to obtain solid particles; the obtained solid particles were then immersed in a 0.1 mol / L sodium hydroxide aqueous solution for 2 h, and then rinsed with deionized water to neutrality and drying to obtain a composite adsorbent that can be used for the removal of methyl orange and fluoride ions in wastewater.

Embodiment 2

[0026] Dissolve 1 g of polyvinyl alcohol in 9 g of deionized water, heat and stir to dissolve, to obtain a polyvinyl alcohol aqueous solution with a concentration of 10 wt%; add 6 g of aluminum nitrate to the polyvinyl alcohol aqueous solution, and then mix the polyvinyl alcohol / aluminum nitrate The composite solution was introduced into an autoclave, hydrothermally reacted at 180 °C for 8 h, taken out and then crushed to obtain solid particles; the obtained solid particles were then immersed in a 0.1 mol / L sodium hydroxide aqueous solution for 1 h, and then rinsed with deionized water to neutrality and drying to obtain a composite adsorbent that can be used for the removal of methyl orange and fluoride ions in wastewater.

Embodiment 3

[0028] Dissolve 1 g of polyvinyl alcohol in 9 g of deionized water, heat and stir to dissolve, to obtain a polyvinyl alcohol aqueous solution with a concentration of 10 wt%; add 6 g of aluminum nitrate to the polyvinyl alcohol aqueous solution, and then mix the polyvinyl alcohol / aluminum nitrate The composite solution was introduced into an autoclave, hydrothermally reacted at 200 °C for 4 h, taken out and then crushed to obtain solid particles; the obtained solid particles were then immersed in a 0.1 mol / L hydrochloric acid aqueous solution for 1 h, and then rinsed with deionized water to medium After drying, a composite adsorbent that can be used for the removal of methyl orange and fluoride ions in wastewater is obtained.

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Abstract

The invention provides a preparation method of a composite adsorbent for removing methyl orange and fluoride ions in waste water for solving existing environmental problems. According to the invention, polyvinyl alcohol is taken as a carbon source, and aluminum salt is taken as an inorganic additive component, then a polyvinyl alcohol / aluminum salt complex is generated in situ, and the polyvinyl alcohol / aluminum salt complex is subjected to a hydrothermal reaction to synthesize a carbon / alumina composite material, the carbon / alumina composite material is soaked through dilute acid or a dilute alkali solution to remove a part of alumina, finally, the composite adsorbent is prepared. The preparation method is economic and environmentally friendly, and can compound at the carbon / alumina molecular level to obtain the porous structure carbon / alumina composite adsorbent which has a better adsorption effect for both methyl orange and fluoride ions in an aqueous solution.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a preparation method of a high-efficiency composite adsorbent for removing methyl orange and fluoride ions in wastewater. Background technique [0002] High organic content, high chroma, high toxicity and complex water quality are the characteristics of printing and dyeing wastewater, and if it is directly discharged, it will cause serious pollution to the environment. At present, there are many methods for removing organic dyes, such as chemical coagulation, biochemical, electrochemical, oxidation, biological treatment, adsorption and so on. However, these methods all have some problems that cannot be ignored, such as low removal efficiency, high cost, and the impact of the material itself on the environment, which are limited in practical applications. [0003] Among these methods, the adsorption method has the simplest process and the lowest cost consump...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20C02F1/28B01J20/30C02F101/14C02F101/30
CPCB01J20/20C02F1/283C02F2101/14C02F2101/308
Inventor 江献财胡海凤侯琳熙
Owner FUZHOU UNIV