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A kind of preparation method and application of heavy metal ion adsorption material

A technology for heavy metal ions and adsorption materials, which is applied in the directions of alkali metal compounds, chemical instruments and methods, adsorption water/sewage treatment, etc. It can solve the problem of increasing the difficulty of dye waste liquid treatment, achieve excellent chelation, and promote environmental protection. , the effect of structural stability

Active Publication Date: 2019-05-31
FUZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The so-called heavy metal pollution mainly refers to elements with significant biological toxicity such as lead, copper, and mercury, as well as elements with certain toxicity such as zinc, tin, and cobalt. Because heavy metals and heavy metal compounds are widely used in chemical industry, electroplating, leather, etc. Industry, as their applications continue to expand, heavy metal pollution is also increasing. Because heavy metals are difficult to biodegrade and have bioaccumulation, the pollution caused by them is continuous. Heavy metals in water have become the most serious in the world today. One of environmental problems, on the other hand, with the development of textile printing and dyeing, papermaking and printing industries, and people's increasing demand for color, the current discharge of organic dye wastewater is increasing in the proportion of various industries in the country, and The types of dyes are constantly updated and increased, and their anti-photolysis, anti-oxidation and anti-biodegradation properties are continuously enhanced, which makes the treatment of dye waste liquid more difficult.

Method used

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  • A kind of preparation method and application of heavy metal ion adsorption material
  • A kind of preparation method and application of heavy metal ion adsorption material
  • A kind of preparation method and application of heavy metal ion adsorption material

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preparation example Construction

[0024] A method for preparing a heavy metal ion adsorption material, using landfill leachate as a raw material, grafting and copolymerizing it with cellulose extracted from tobacco stalks to obtain a landfill leachate-tobacco stalk fiber composite, through the landfill leachate-tobacco After the stalk fiber composite is gelled, it is regenerated, solvent exchanged and supercritical carbon dioxide dried to prepare the landfill leachate-tobacco stalk cellulose-based aerogel with adsorption properties for heavy metal ions.

[0025] Further, it includes the following steps:

[0026] (1) After filtering and removing impurities from the landfill leachate, adjust its pH to 7-9, then add coagulant, and use a stirring device to stir at 2000-3000rpm for 3-5min, then stir at 500-650rpm for 10 minutes ~15min, after the stirring is completed, let the mixed solution stand for precipitation, then filter the precipitate to form a solution, and adjust the pH value of the prepared solution to 7...

Embodiment 1

[0041] A preparation method for a heavy metal ion adsorption material, comprising the following steps:

[0042] (1) Adjust the pH of 26.97Kg of landfill leachate after filtration and removal of impurities to 7, then add 0.03Kg of ferric chloride, and use a stirring device to stir at a speed of 2000rpm for 3min, then stir at a speed of 600rpm for 10min, After the stirring is completed, the mixed solution is left to settle, and then the precipitate is filtered out to form a solution with a solid content of 58%, and the pH value of the solution is adjusted to 7;

[0043] (2) 10Kg of the tobacco stalk after the pitting core is crushed and passed through a 14-mesh sieve, and then the sieved tobacco stalk is dissolved with 5Kg of sodium hydroxide solid particles to form a 2% sodium hydroxide solution Mix, and heat the mixed solution to 90°C, and after reacting for 1 hour, filter out the solids in the mixed solution;

[0044] (3) Dilute the above-mentioned filtered solid matter with...

Embodiment 2

[0049] A preparation method for a heavy metal ion adsorption material, comprising the following steps:

[0050] (1) Adjust the pH of 24Kg of the filtered and impurity-removed landfill leachate to 8, then add 0.05Kg of aluminum sulfate, and use the stirring device to stir at 2100rpm for 3min, then stir at 610rpm for 10min, after the stirring is completed The mixed solution was left to settle, and then the precipitate was filtered out to form a solution with a solid content of 40%, and the pH value of the solution was adjusted to 8;

[0051] (2) 10Kg of the tobacco stalk after the pith removal is crushed and passed through a 14-mesh sieve, and then the sieved tobacco stalk is dissolved with 5.95Kg of sodium hydroxide solid particles to form a mass fraction of 2% sodium hydroxide The solutions are mixed, and the mixed solution is heated to 100° C., and after reacting for 5 hours, the solids in the mixed solution are filtered out;

[0052] (3) Dissolve the above-mentioned filtere...

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Abstract

The invention discloses a preparation method of heavy metal ion adsorbing materials and an application of the materials. According to the method, landfill leachate serves as raw materials, the landfill leachate and cellulose extracted from tobacco stems are grafted and copolymerized to prepare landfill leachate-tobacco stem cellulose compounds, the landfill leachate-tobacco stem cellulose compounds are gelatinized, regeneration, solvent exchange and vacuum drying are performed for the landfill leachate-tobacco stem cellulose compounds to prepare landfill leachate-tobacco stem cellulose aerogel, and prepared landfill leachate-tobacco stem cellulose aerogel materials are larger in hole diameter, high in porosity and stable in structure and have good sequestration, adsorption efficiency and adsorbing capacity for heavy metals in waste water. According to the preparation method, the landfill leachate-tobacco stems and the tobacco stems are low in cost and used, treatment cost of heavy metal ions can be reduced, resources can be greatly recycled, and environmental protection is facilitated.

Description

technical field [0001] The invention relates to the field of heavy metal ion adsorption materials, in particular to a preparation method and application of heavy metal ion adsorption materials. Background technique [0002] With the rapid development of industry, the discharge of wastewater generated in the process of industrial production is also increasing. The industrial wastewater containing heavy metal ions and organic dyes will cause serious pollution of water bodies, endangering the ecological environment and human health. Therefore, industrial wastewater The processing of has attracted great attention of the majority of scientific and technological workers. The so-called heavy metal pollution mainly refers to elements with significant biological toxicity such as lead, copper, and mercury, as well as elements with certain toxicity such as zinc, tin, and cobalt. Because heavy metals and heavy metal compounds are widely used in chemical industry, electroplating, leather...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28C02F101/20C02F103/06
CPCB01J20/24B01J20/28047C02F1/286C02F2101/20C02F2103/06
Inventor 刘明华张玉清吕源财林春香刘登周
Owner FUZHOU UNIV