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Nanometer lignocellulose/montmorillonite composite material and preparation and application thereof

A technology of lignocellulose and composite materials, which can be applied in other chemical processes, water/sewage treatment, adsorbed water/sewage treatment, etc., and can solve the problems of large investment, high operating cost, secondary pollution, etc.

Active Publication Date: 2018-05-04
INNER MONGOLIA AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] There are many ways to remove heavy metal ions, such as redox method, electrolysis method, ion exchange method, chemical precipitation method and biological method, but these methods have large investment, high operating cost, complicated operation and management, and are prone to secondary pollution. shortcoming

Method used

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  • Nanometer lignocellulose/montmorillonite composite material and preparation and application thereof
  • Nanometer lignocellulose/montmorillonite composite material and preparation and application thereof
  • Nanometer lignocellulose/montmorillonite composite material and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0094] The present embodiment provides a kind of preparation method of nanometer lignocellulose, it comprises the following steps:

[0095] Weigh 0.5000g of lignocellulose, place it in 250mL of 20% NaOH aqueous solution with a mass fraction of 20%, fully stir it with a glass rod until it forms a suspension, and then use the SM-1200D ultrasonic cell pulverizer (Changzhou Guohua Electric Co., Ltd.) Ultrasonic treatment is performed on lignocellulose uniformly dispersed in alkaline ultrasonic medium, wherein the horn is Φ20mm, the ultrasonic temperature is 10°C, the ultrasonic generation time is 1.0s, the ultrasonic gap is 2.0s, the ultrasonic power is 1080W, and the ultrasonic time for 150 min, centrifuged, and the lower layer was taken for use.

Embodiment 2

[0097] The present embodiment provides a kind of preparation method of nanometer lignocellulose / montmorillonite composite material, it comprises the following steps:

[0098] 1. Weigh 0.5000 g of the nano-lignocellulose lower layer liquid obtained in Example 1, dissolve it in 75 mL of a 12.5% ​​NaOH aqueous solution, and stir for 30 min at 60° C. to form a nano-lignocellulose suspension;

[0099] 2. Weigh 0.5000g of montmorillonite, dissolve it in 15mL of distilled water, stir at room temperature for 30min, and obtain a suspension of montmorillonite;

[0100] 3. Under the condition of constant stirring, slowly add the nano-lignocellulose suspension in the above step 1 to the montmorillonite suspension in the above step 2, stir and mix, heat up to 50°C, stir for 4 hours, and filter with suction , wash the product with distilled water until neutral, vacuum-dry at 85°C for 240 minutes, and grind the dried product through a 200-mesh sieve to obtain a nano-lignocellulose / montmorill...

Embodiment 3

[0115] This embodiment provides the application of the nano-lignocellulose / montmorillonite composite material obtained in Example 2 in the adsorption of heavy metal ions, which specifically includes the following steps:

[0116] 1. Get the prepared nano-lignocellulose / montmorillonite composite material 0.0500g of above-mentioned embodiment 2, put into the aqueous solution containing Zn (II) and carry out adsorption capacity test, setting temperature is placed in constant temperature oscillator (6000r / min ), wherein the concentration of Zn(II) in the solution is 1000 mg / L, the pH value is 2.6, the adsorption temperature is 65° C., and the adsorption time is 120 min, the absorbance is measured, and the adsorption amount is calculated.

[0117] 2. In addition, get 0.0500g of nano-lignocellulose / montmorillonite composite material prepared in the above-mentioned embodiment 2, put it into an aqueous solution containing Mn(II) and carry out the adsorption capacity test, set the temper...

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Abstract

The invention provides a nanometer lignocellulose / montmorillonite composite material and preparation and application thereof. The nanometer lignocellulose / montmorillonite composite material is an intercalation / stripping type nanometer composite material, and is compounded by nanometer lignocellulose and montmorillonite according to a mass ratio of 1:(1 to 10); the nanometer lignocellulose is intercalated into sheets of montmorillonite. The nanometer lignocellulose / montmorillonite composite material has the advantages that the nanometer lignocellulose / montmorillonite composite material is a novel heavy metal ion wastewater absorbent with low cost, good biocompatibility and high efficiency; the preparation method is simple, the regeneration property is good, the environment-friendly effect is realized, and the like; the obvious affinity and adsorption selectivity on the heavy metal ions in the wastewater are realized.

Description

technical field [0001] The invention relates to a nano lignocellulose / montmorillonite composite material and its preparation and application, belonging to the technical field of composite materials. Background technique [0002] Water is one of the important natural resources that human beings rely on for survival, and it is also an important part of the human ecological environment. Due to the impact of human industrial activities, more and more pollutants have entered the water environment, and these pollutants have caused many problems to the environment and human health. Heavy metal pollution is one of the most harmful water pollution problems. Heavy metals enter water bodies through various forms such as mining, metal smelting, metal processing, chemical production wastewater, domestic garbage, application of pesticides and fertilizers, and geological erosion and weathering. In addition, heavy metal ions are highly toxic, difficult to be metabolized, and easy to be bio...

Claims

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Application Information

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IPC IPC(8): C08J3/28C08L1/02C08K3/34B01J20/24B01J20/30C02F1/28C02F101/20
CPCB01J20/12B01J20/24C02F1/281C02F1/286C02F1/288C02F2101/20C02F2101/206C08J3/28C08J2301/02C08K3/346C08L1/02
Inventor 张晓涛安宇宏李丽丽王喜明王哲王丽
Owner INNER MONGOLIA AGRICULTURAL UNIVERSITY
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