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

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: 2019-07-09
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 wastewater
  • Preparation method of composite adsorbent for removing methyl orange and fluoride ions in wastewater
  • Preparation method of composite adsorbent for removing methyl orange and fluoride ions in wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Get 1 g of polyvinyl alcohol and dissolve it 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 polyvinyl alcohol / aluminum nitrate The composite solution was introduced into a high-pressure reactor, hydrothermally reacted at 140 °C for 4 h, and then crushed to obtain solid particles; the obtained solid particles were immersed in 0.1 mol / L sodium hydroxide aqueous solution for 2 h, and then rinsed with deionized water to neutrality, and then dry to obtain a composite adsorbent that can be used for the removal of methyl orange and fluoride ions in wastewater.

Embodiment 2

[0026] Get 1 g of polyvinyl alcohol and dissolve it in 9 g of deionized water, heat and stir to dissolve, and 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 polyvinyl alcohol / aluminum nitrate The composite solution was introduced into a high-pressure reactor, hydrothermally reacted at 180 °C for 8 h, and then crushed to obtain solid particles; the obtained solid particles were immersed in 0.1 mol / L sodium hydroxide aqueous solution for 1 h, and then rinsed with deionized water to neutrality, and then dry to obtain a composite adsorbent that can be used for the removal of methyl orange and fluoride ions in wastewater.

Embodiment 3

[0028] Get 1 g of polyvinyl alcohol and dissolve it in 9 g of deionized water, heat and stir to dissolve, and 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 polyvinyl alcohol / aluminum nitrate The composite solution was introduced into a high-pressure reactor, and hydrothermally reacted at 200 °C for 4 h, and then it was taken out and crushed to obtain solid particles; the obtained solid particles were immersed in 0.1 mol / L hydrochloric acid aqueous solution for 1 h, and then rinsed with deionized water until 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 an efficient composite adsorbent for removing methyl orange and fluorine ions in waste water. Background technique [0002] High organic content, high chroma, high toxicity and complex water quality are the characteristics of printing and dyeing wastewater. If it is discharged directly, it will cause serious pollution to the environment. At present, there are many ways to remove organic dyes, such as: chemical coagulation method, biochemical method, electrochemical method, oxidation method, biological treatment method, adsorption method and so on. However, these methods have some problems that cannot be ignored, such as low removal efficiency, high cost, and the impact of the material itself on the environment, so its practical application is limited. [0003] Among these methods, the adsorption method has the simplest process and th...

Claims

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Application Information

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Patent Type & Authority Patents(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