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A kind of lignin microsphere and its preparation method and application

A technology of lignin and sodium lignosulfonate, which is applied in the field of synthesis of natural polymer materials, can solve the problems of high cost and refractory degradation, and achieve high recycling rate, strong removal effect and good practicability

Active Publication Date: 2022-04-19
NANJING FORESTRY UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] The purpose of the invention is to provide a lignin-based adsorption material for the problems of high cost and difficult degradation after use in the existing adsorbent synthesis and development technology, which combines the natural polymer material lignin with starch through a composite cross-linking reaction system Preparation of lignin particle-type adsorbent, this adsorbent material has a strong adsorption effect on heavy metals in wastewater, and has a high recycling rate, which meets the needs of practical applications

Method used

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  • A kind of lignin microsphere and its preparation method and application
  • A kind of lignin microsphere and its preparation method and application
  • A kind of lignin microsphere and its preparation method and application

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Embodiment Construction

[0030] Below in conjunction with specific embodiment the present invention will be further described, but protection scope of the present invention is not limited to this:

[0031] The main drugs used in the following examples: lignin (Aladdin Company), lead nitrate (Tianjin Chemical Reagent Company), starch (Sinopharm Chemical Reagent Co., Ltd.), epichlorohydrin, glutaraldehyde, cyclohexane, span-80 And tween-80 (Sinopharm Chemical Reagent Co., Ltd.).

[0032] The consumption of each component in table 1 embodiment 1~3

[0033]

[0034]

[0035] The first step: soak sodium lignosulfonate in hydrochloric acid solution, take the precipitated part and dissolve it in alkaline reagent solution, adjust the pH value of the solution to 9-11, and obtain alkaline sodium lignosulfonate solution; The pasty starch solution is added to the alkaline sodium lignosulfonate solution and stirred to form a homogeneous emulsion, and then a composite crosslinking agent is added and stirred ...

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Abstract

The invention discloses a lignin microsphere, a preparation method and application thereof. The lignin granular adsorbent is electronegativity and has a quasi-spherical shape with a diameter of about 0.2 mm. The present invention cross-links and fixes macromolecular lignin on starch through a composite cross-linking agent system to obtain lignin gel particles. The synthetic raw materials of the lignin granular adsorbent are cheap and completely biodegradable. At the same time, it is found through research on its adsorption performance It has a strong adsorption performance for heavy metals, and this adsorbent has a high recycling rate, so it has a wide range of uses in heavy metal adsorption, water treatment, and as an adsorbent, and has good practicability .

Description

technical field [0001] The invention relates to the field of synthesis of natural polymer materials, in particular to a lignin granular adsorbent and its preparation method and application. Background technique [0002] With the rapid development of my country's economy and the vigorous development of water resources, the situation of water pollution is also intensified. Heavy metal pollution is the most common and main pollutant. Heavy metals have the characteristics of high toxicity, persistence, and easy migration and enrichment. Industries such as electroplating, mining, metallurgy, electronics, and machinery manufacturing discharge a large amount of heavy metal wastewater every year, causing serious pollution to water bodies. The research on efficient treatment technology of heavy metal wastewater has always been a hot spot of domestic and foreign scholars. The treatment methods of heavy metal wastewater mainly include chemical precipitation, membrane separation, adso...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28C02F101/20
Inventor 陈荣平勇强虞磊李青黄曹兴赖晨欢
Owner NANJING FORESTRY UNIV
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