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Method for preparing regenerated-cellulose and sodium-humate blended large-pore adsorption gel

A technology for regenerated cellulose and sodium humate, which is applied in chemical instruments and methods, adsorbed water/sewage treatment, textile industry wastewater treatment, etc. Problems such as the outward diffusion of dye macromolecules, to achieve the effect of good adsorption performance and good environmental friendliness

Active Publication Date: 2016-07-06
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The adsorption and swelling process of the non-porous adsorption gel prepared by the traditional method in the waste liquid system is mainly a slow diffusion process of heavy metal ions or dye molecules, and in the process of eluting pollutants, the surface of the non-porous gel shrinks first, The formed dense skin hinders the outward diffusion of heavy metal ions or dye macromolecules inside the gel, making the adsorption gel take longer to elute, which largely limits the effect of its repeated use

Method used

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Examples

Experimental program
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Effect test

Embodiment １

[0030] Example 1: The preparation method of large-pore regenerated cellulose / sodium humate adsorption gel, the specific operations are as follows:

[0031] (1) Preparation process of calcium alginate microparticles

[0032] Mix 15mL of calcium chloride solution with a concentration of 15mg / mL, 0.3g of Span80 and 100mL of cyclohexane, stir at a high speed until a homogeneous mixture is formed, and then, under the action of mechanical stirring at 1000rpm, add 2mL of a concentration of 1.0mg / mL Add mL of sodium alginate solution dropwise into the homogeneous mixture. After the dropwise addition, stand still and separate the solid and liquid with a 0.22 μm nylon filter membrane. The solid part obtained is first soaked and washed twice with acetone, and then soaked and washed with deionized water. 2 times to get calcium alginate microparticles;

[0033] (2) Dissolving process of cellulose powder

[0034] Dissolve 1.2g of sodium hydroxide (mass volume ratio concentration of 2.0%) ...

Embodiment 2

[0043] Embodiment 2: the preparation method of large-pore regenerated cellulose / sodium humate adsorption gel, the specific operations are as follows:

[0044] (1) Preparation process of calcium alginate microparticles

[0045] Mix 30mL of calcium chloride solution with a concentration of 40mg / mL, 2.0g of Span80 and 350mL of cyclohexane, stir at a high speed until a homogeneous mixture is formed, and then, under the action of mechanical stirring at 5000rpm, mix 15mL with a concentration of 3.7mg / mL Add mL of sodium alginate solution dropwise into the homogeneous mixture. After the dropwise addition, let it stand still and separate the solid from the liquid with a 0.45 μm nylon filter membrane. The obtained solid part is first soaked and washed with acetone for 6 times, and then soaked in deionized water. Washed 6 times to obtain calcium alginate microparticles;

[0046] (2) Dissolving process of cellulose powder

[0047] Dissolve 14.4g of sodium hydroxide (mass volume ratio c...

Embodiment 3

[0056] Embodiment 3: the preparation method of large-pore regenerated cellulose / sodium humate adsorption gel, the specific operations are as follows:

[0057] (1) Preparation process of calcium alginate microparticles

[0058] Mix 50mL of calcium chloride solution with a concentration of 50mg / mL, 3.0g of Span80 and 500mL of cyclohexane, stir at a high speed until a homogeneous mixture is formed, and then, under the action of mechanical stirring at 6000rpm, mix 20mL with a concentration of 5.0mg / mL Add mL of sodium alginate solution dropwise to the homogeneous mixed solution. After the dropwise addition, let stand and separate the solid and liquid with a 0.80 μm nylon filter membrane. The obtained solid part is first soaked and washed with acetone for 8 times, and then soaked in deionized water. Washed 8 times to obtain calcium alginate microparticles;

[0059] (2) Dissolving process of cellulose powder

[0060] Dissolve 36g of sodium hydroxide (6.0% mass volume ratio concent...

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Abstract

The invention discloses a method for preparing regenerated-cellulose and sodium-humate blended large-pore adsorption gel.The method includes the steps that a sodium alginate solution is dropwise added into a homogeneous mixing system of Span 80 / cyclohexane / a calcium chloride solution to form calcium alginate microparticles; meanwhile, dry cellulose powder is dissolved into low-temperature sodium hydroxide (or lithium hydroxide) / urea (or thiourea) liquid, the mixture is centrifuged and defoamed, residues are removed, and cellulose dissolved clear liquid is obtained; sodium humate is dissolved into the clear liquid, the calcium alginate microparticles continue to be added, epoxy chloropropane is added for etherification crosslinking after even dispersing, obtained gel is soaked into a sodium citrate solution, calcium alginate particles are removed, and the regenerated-cellulose / sodium-humate blended gel is prepared.The obtained gel is in a micropore block shape and has high adsorption capacity for heavy metal ions such as Pb2+ and Cu2+ and organic dye such as Congo red and methyl violet.The gel is a natural macromolecule mixture and belongs to 'environment-friendly' adsorption materials.

Description

technical field [0001] The invention relates to a method for preparing a large-aperture adsorption gel capable of rapidly adsorbing heavy metals and organic dyes by using biomass --- cellulose and sodium humate, and belongs to the technical field of natural polymer modified materials. Background technique [0002] With the rapid development of various industries, the discharge of wastewater is also increasing. The industrial wastewater containing heavy metal ions and organic dyes has caused serious pollution to the water body, endangering the ecological environment and human health. Therefore, the treatment of industrial wastewater has become It has aroused the 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 c...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28
CPCB01J20/24C02F1/286B01J20/28047C02F2101/20C02F2103/30B01J2220/4812
Inventor 高欣张恒陈克利
Owner KUNMING UNIV OF SCI & TECH
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