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Lignin-based polymer capable of simultaneously adsorbing heavy metal ions and organic dyestuff, preparation method and application

A technology for adsorbing heavy metals and heavy metal ions, applied in chemical instruments and methods, water pollutants, adsorbed water/sewage treatment, etc., can solve the problems of unsuitable large-scale preparation, urgent need to improve adsorption performance, and complex modification methods. The effect of cheap source, mild conditions and simple preparation method

Active Publication Date: 2016-06-08
ANHUI UNIV OF SCI & TECH
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  • Application Information

AI Technical Summary

Problems solved by technology

However, there are currently the following problems: First, the modification method for preparing adsorption materials from papermaking by-product lignosulfonate is complicated and not suitable for macro-scale preparation; second, the adsorption of heavy metal ions or organic pollutants in water by most modified materials Performance needs to be improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Add 5 sodium lignosulfonate to 10mL to a concentration of 2mol.L -1 In the mixed solution of NaOH and 20mL of isopropanol, stir to dissolve, and drop 4.2mL of epichlorohydrin within 1.5h at 40°C. Gradually raise the temperature to 70°C and react for 6 hours. Suction filtration, washing, and drying to obtain a lignin-based polymer.

Embodiment 2

[0016] Add 5 sodium lignosulfonate to 10mL to a concentration of 2mol.L -1 In the mixed solution of NaOH and 20mL of acetone, stir to dissolve, and drop 5mL of epichlorohydrin within 1.5h at 30°C. Gradually raise the temperature to 50°C and react for 6 hours. Suction filtration, washing, and drying to obtain a lignin-based polymer.

Embodiment 3

[0018] Add 5 sodium lignosulfonate to 10mL to a concentration of 2mol.L -1 Add NaOH and 10 mL of tetrahydrofuran to the mixture, stir to dissolve, and drop 5 mL of epichlorohydrin within 1.5 h at 35°C. Gradually raise the temperature to 55°C and react for 6 hours. Suction filtration, washing, and drying to obtain a lignin-based polymer.

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Abstract

The invention discloses a lignin-based polymer and a preparation method and application thereof. The lignin-based polymer is prepared with a papermaking byproduct sodium lignin sulfonate as a raw material through a cross-linking polymerization reaction. Under the alkaline condition, commercially-available sodium lignin sulfonate and epoxy chloropropane are subjected to cross-linking polymerization in a water-organic solvent mixed solution, and the water-insoluble lignin-based polymer is obtained. The synthesis reaction is simple, conditions are mild, and industrialization is easy. The lignin-based polymer prepared through the method can serve as an adsorption material, organic dyestuff (methylene blue, basic fuchsin and rhodamine B) in water and part of heavy metal ions (Pb2+ and Cd2+) can be effectively adsorbed, and the organic dyestuff and the heavy metal ions in a mixed system formed by the organic dyestuff (methylene blue, basic fuchsin and rhodamine B) and the heavy metal ions (Pb2+ or Cd2+) can be adsorbed simultaneously.

Description

technical field [0001] The invention relates to a lignin-based polymer, its preparation method and the performance of simultaneously adsorbing heavy metal ions and basic dyes, and belongs to the field of polymer materials. Background technique [0002] At present, lignosulfonate, a by-product of papermaking, has been effectively utilized in many fields, but its efficient utilization has not been realized. Lignosulfonate is insoluble in water in acidic environment, but has good water solubility in neutral and alkaline conditions. It needs to be modified when it is used as an adsorption material for wastewater treatment. Utilize the hydrophobic aromatic network and hydrophilic polar groups such as methoxy, sulfonic acid, and hydroxyl in the lignosulfonate structure to design and prepare adsorption materials with adsorption properties for heavy metal ions or organic substances. The work in this area has been carried out for decades, and there are existing methods of modificati...

Claims

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Application Information

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IPC IPC(8): B01J20/26C02F1/28C02F101/30C02F101/20
Inventor 张晓梅鲁安武李大培罗再刚石亮彭成松
Owner ANHUI UNIV OF SCI & TECH
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