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Method for preparing magnetic lignin adsorbent

A lignin and adsorbent technology, applied in chemical instruments and methods, adsorption water/sewage treatment, alkali metal oxides/hydroxides, etc., to achieve the effect of abundant sources

Inactive Publication Date: 2015-04-01
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problem of recycling lignin adsorbents in the prior art, we have conducted a lot of research and found that lignin composite magnetic materials can be used to provide lignin adsorbents with a magnetic response, making them easy to separate under the action of a magnetic field , to solve the problem of lignin adsorbent recovery and reuse

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The implementation method is: 0.1g Fe 3 O 4 , add 5ml lignin NaOH solution (12wt%) and ultrasonic for 30min, after ultrasonication, add 20ml paraffin, 0.25g sodium dodecylbenzenesulfonate, add 2ml epichlorohydrin, react at 60 ℃ for 3h, magnetic separation after the end of the reaction Vacuum dry. Take the product of the previous step, add 5ml of diethylenetriamine and 12.5mg of anhydrous sodium carbonate to react at 70°C for 3h, and magnetically separate the product to vacuum dry it and use it as an adsorbent.

[0020] Tested by static adsorption method, 15mg of the adsorbent adsorbed aniline blue dye with an initial concentration of 300mg / L for 12h, the residual aniline blue concentration was measured to be 0.15mg / L, and its adsorption capacity was 499.75mg / g respectively. The removal rate was 499.75mg / g. is 99.95%.

[0021] Tested by static adsorption method, 35mg of the adsorbent can react to 25mL of Cr with an initial concentration of 100mg / L. 6+ The solution wa...

Embodiment 2

[0023] The implementation method is: 0.1g Fe 3 O 4 , add 5ml lignin NaOH solution (12wt%) and ultrasonic for 30min, after ultrasonication, add 20ml paraffin, 0.25g sodium dodecylbenzenesulfonate, add 2ml epichlorohydrin, react at 60 ℃ for 3h, magnetic separation after the end of the reaction Vacuum dry. Take the product of the previous step, add 4 ml of hexanediamine, and 12.5 mg of anhydrous sodium carbonate to react at 80 °C for 3 h, and magnetically separate the product to vacuum dry it and use it as an adsorbent.

[0024] Tested by static adsorption method, 15mg of the adsorbent adsorbed 25mL of aniline blue dye with an initial concentration of 300mg / L for 12h, the residual aniline blue concentration was measured to be 37.35mg / L, and its adsorption capacity was 437.75mg / g, respectively, and the removal rate was is 87.55%.

[0025] Tested by static adsorption method, 35mg of the adsorbent can react to 25mL of Cr with an initial concentration of 100mg / L. 6+ The solution ...

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Abstract

The invention belongs to the technical field of water treatment, and particularly relates to an adsorbent for removing metal ions and a dye. The method is characterized in that lignin is adopted as a base body; epoxy chloropropane is adopted as a cross-linking agent; ferroferric oxide is adopted as a magnetic source; and diethylenetriamine, hexamethylenediamine, ethylenediamine and the like are adopted as aminating reagents. Compared with a traditional lignin adsorbent, the method has the characteristics that the adsorbent is easy to separate, can be repeatedly used, is beneficial to environmental protection and the like.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to an adsorbent for removing metal ions and dyes. Background technique [0002] China's water resources are unevenly distributed in space and time. With the development of various production and living activities, water pollution has aggravated the shortage of water resources. In recent years, the development of industry has increased the pressure of environmental protection. Among them, the textile industry is the most important The various industries represented use dyes to increase the color of the products, thus the discharge of dark organic wastewater has become one of the important sources of water pollution. In addition, if the wastewater containing heavy metals produced in the production process of mine development, electroplating, chemical fertilizers, tanning, batteries, papermaking, pesticides and other industries is directly or indirectly discharged i...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30B01J20/28C02F1/28C02F1/62C02F1/58
CPCB01J20/24B01J20/28009B01J20/3085B01J2220/4837C02F1/286C02F1/58C02F1/62
Inventor 王海军宋展欣刘文涛杨艳王宁宁
Owner JIANGNAN UNIV
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