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Heavy metal ion adsorption resin and preparation method thereof

A heavy metal ion and adsorption resin technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of less repeated use, high cost of modified resin, poor selectivity, etc., to improve gel strength and avoid dissolution loss , Improve the effect of performance

Inactive Publication Date: 2012-09-19
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, for the adsorption of metal ion lead in solution, most of the adsorption resins have more or less disadvantages: small adsorption capacity, or less repeated use times, or poor selectivity, or high cost
The adsorption material synthesized with chitosan as raw material has a good application prospect in the purification treatment of industrial wastewater, and has good selectivity, stable adsorption, controllable adsorption speed, high treatment efficiency and effluent purity, and can realize precious metal recovery at the same time Utilization, adsorption materials can be biodegradable and other advantages, so it plays an increasingly important role in the field of sewage treatment, especially heavy metal sewage treatment, but its own adsorption capacity is low, the cost is high, especially the cost of its modified resin is high, it is difficult to be used by users accept

Method used

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  • Heavy metal ion adsorption resin and preparation method thereof
  • Heavy metal ion adsorption resin and preparation method thereof
  • Heavy metal ion adsorption resin and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0043]Add 100 parts of dilute acetic acid with a mass concentration of 2% into the reactor, adjust the external heating water bath to keep the temperature constant at 60°C; add 2 parts of chitosan, stir until completely dissolved; add 1.0 part of wood flour, stir at a low speed to make the dispersion even ; Add 0.25 parts of potassium persulfate initiator, stir and pre-initiate for 20 minutes, then add 8 parts of acrylic acid (AA), 4 parts of acrylamide (AM), and 0.024 parts of crosslinking agent N-N methylenebisacrylamide. Increase the rotation speed for about 1-2 minutes to fully mix as soon as possible, then cut off the air, adjust the stirring speed to 40rmp, and keep warm at 60°C for 5hrs. Filter out the granular product, rinse once with 800 parts of tap water and distilled water, then disperse the above product in 300 parts of absolute ethanol, add 9 parts of NaOH solution with a concentration of 10mol / L, and soak for 12hr to obtain a heavy metal ion adsorption resin; Th...

Embodiment 2

[0045] Add 100 parts of dilute acetic acid with a mass concentration of 2% into the reactor, adjust the external heating water bath to keep the temperature constant at 60°C; add 2.4 parts of chitosan, stir until completely dissolved; add 1.0 parts of wood flour, stir at a low speed to make the dispersion uniform ; Add 0.35 parts of potassium persulfate initiator, stir for 20 minutes to pre-initiate, then add 4 parts of acrylic acid (AA), 8 parts of acrylamide (AM), 0.01 part of cross-linking agent N-N methylenebisacrylamide, increase the speed About 1-2 minutes to fully mix as soon as possible; then cut off the air, adjust the stirring speed to 40rmp, and keep warm at 60°C for 5hrs. Filter out the granular product, rinse once with 800 parts of tap water and distilled water, then disperse the above product in 300 parts of absolute ethanol, add 6.0 parts of NaOH solution with a concentration of 10mol / L, and soak for 12hr to obtain a heavy metal ion adsorption resin; The resin is...

Embodiment 3

[0047] Add 100 parts of dilute acetic acid with a mass concentration of 2% into the reactor, adjust the external heating water bath to keep the temperature constant at 60°C; add 1.5 parts of chitosan, and stir until it is completely dissolved; add 2 parts of wood flour, and stir at a low speed to disperse evenly ; Add 0.4 parts of potassium persulfate initiator, stir for 25 minutes to pre-initiate, then add 3 parts of acrylic acid (AA), 9 parts of acrylamide (AM), 0.03 parts of cross-linking agent N-N methylenebisacrylamide, increase the speed Mix well for about 1-2 minutes; then cut off the air, adjust the stirring speed to 40rmp, keep warm at 60°C, and react for 5hr. Filter out the granular product, rinse once with 800 parts of tap water and distilled water, then disperse the above product in 300 parts of absolute ethanol, add 4 parts of NaOH solution with a concentration of 10mol / L, and soak for 12hr to obtain a heavy metal ion adsorption resin; The resin is dried in a cons...

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Abstract

The invention belongs to the technical field of preparation of functional high polymer materials, and particularly relates to a natural high polymer material modified adsorption resin for the adsorption of heavy metal ions and a preparation method for the adsorption resin. The heavy metal ion adsorption resin comprises the following components in percentage by weight: 10.0 to 15.0 percent of chitosan (Chit), 25.0 to 50.0 percent of acrylic acid (AA), 20 to 45 percent of acrylamide (AM), 0.1 to 0.4 percent of N,N-methylene-bisacrylamide (NMBA), 1.0 to 3.0 percent of potassium persulfate (KPS) and 0.0 to 15.0 percent of wood meal. By the heavy metal ion adsorption resin, Pb2+ can be efficiently adsorbed and separated, the cost of a chitosan modified adsorption resin can be lowered, adsorption capacity can be improved, the number of reuse times can be increased, and the adsorptive selectivity of the resin can be improved.

Description

technical field [0001] The invention belongs to the technical field of preparation of functional polymer materials, and in particular relates to a natural polymer material modified adsorption resin for heavy metal ion adsorption and a preparation method thereof. Background technique [0002] In heavy metal ion adsorption and chelating resins, the commonly used ligands are shown in Table 1, and the plural inherent coordination atoms of these ligands are introduced into the polymer matrix to form chelating resins. These resins are commonly used ion exchange resins, hydrogels, superabsorbent resins, etc., such as phenolic resin-based adsorption resins, polyacrylonitrile adsorption resins, polyacrylate adsorption resins, cross-linked polyacrylates, polyacrylamides and their modifications. Sexual products, polyhydroxyethyl acrylate (PHEMA), cross-linked polystyrene modified products, polyethyleneimine, starch and its derivatives, cellulose and its derivatives, chitin / chitosan and...

Claims

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Application Information

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IPC IPC(8): C08F251/00B01J20/26B01J20/24B01J20/30
Inventor 谢建军韩心强张绘营李晟赵邦柱汪文玲高志宇
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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