Preparation and application of sulfonitride heavy metal ion chelating polymer microspheres

A technology of heavy metal ions and chelating polymers, which is applied in the preparation of microspheres, microcapsule preparations, water pollutants, etc., can solve the problems of slow release of chelating agents, decreased chelating ability, leakage pollution, etc., and achieves low production costs, Ease of operation, avoiding the effects of release and leakage

Inactive Publication Date: 2012-02-01
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is a deficiency in these existing adsorbent preparation methods: the step of coupling the ligand to the polymer adsorption matrix must be included, and the common problems faced by this synthesis step are high cost, harsh conditions, and the need for the adsorption Matrix activation to immobilize metal chelating ligands on the matrix, the bigger problem is that this covalently bonded chelating agent will slowly release and leak from the adsorption matrix, resulting in a decrease in chelating capacity and leakage contamination

Method used

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  • Preparation and application of sulfonitride heavy metal ion chelating polymer microspheres

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Preparation of sulfur nitrogen heavy metal ion chelating polymer microspheres: 2 mmol of polyvinyl alcohol was dissolved in 2 mol of deionized water to obtain an aqueous phase. Put 10mmol 4-vinylpyridine, 10mmol polyethylene glycol methacrylate, and 2.5mmol thiodiethylene glycol dimethacrylate into a sample bottle, add 70mmol n-octanol to dissolve, and then add benzoyl peroxide 0.058 g (0.24mmol), after complete dissolution, a dispersed phase was obtained. Mix the obtained aqueous phase and dispersed phase, replace with nitrogen for 10 minutes, remove oxygen, seal the tube, place in a constant temperature shaking water bath, keep at 82°C for 4 hours, then at 90°C for 2 hours. After the reaction is finished, cool to room temperature, and centrifuge at a speed above 15,000 rpm on a centrifuge to obtain a crude product of polymer microspheres. Re-suspend the microspheres in ethanol, then centrifuge, repeat the operation twice, and deionized water three times to remove the...

Embodiment 2-15

[0020] The operation process is the same as in Example 1, and the specific parameters of the aqueous phase and the dispersed phase are shown in Table 1.

[0021]

[0022] Table 1

[0023]

Embodiment 16

[0025] Application of heavy metal chelating polymer microspheres: The circuit board wastewater from a company in Suzhou was selected, and the measured copper ion concentration was 128 mg / L, and the pH was 5.2. Add 2g·L -1The heavy metal ion chelating polymer microspheres of Examples 1 to 15 were stirred at room temperature for 3 minutes at a stirring rate of 250 rpm, then left to filter, and the supernatant was taken to measure the copper ion concentrations of 0.0597mg / L and 0.0691mg / L respectively. L, 0.0582mg / L, 0.0787mg / L, 0.130mg / L, 0.423mg / L, 0.310mg / L, 0.284mg / L, 0.261mg / L, 0.356mg / L, 0.0645mg / L, 0.0723mg / L L, 0.0816mg / L, 0.0633mg / L, 0.0836mg / L, the concentration of copper ions all meet the national emission standards.

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Abstract

The invention discloses preparation and application of sulfonitride heavy metal ion chelating polymer microspheres, relating to the technical field of preparation of functionalized polymer materials and treatment of waste water including heavy metal ions. The sulfonitride heavy metal ion chelating polymer microsphere is synthesized by suspension polymerization with 4-vinylpyridine and polyethylene glycol methacrylate as polymerizing monomers and thiodiglycol dimethacrylate as a cross-linking agent; the cross-linked polymer microsphere contains sulfur and nitrogen functional ligands to enhancethe chelating removal effect for the heavy metal ions, achieve the polymerization and the chelating agent functionalization by one-step method and effectively avoid the release of a chelating agent; and the cross-linked polymer microsphere has excellent mechanical intensity and can be used for filling columns or beds to remove the heavy metal ions. The preparation method is a high-efficient, simple and feasible process flow, is not easy to cause the secondary pollution, and has the advantages of simple structure of required equipment, convenience for operation, low production cost, and easiness in controlling conditions.

Description

technical field [0001] Preparation and application of a novel sulfur and nitrogen heavy metal ion chelating polymer microsphere. The present invention relates to the preparation of polymer microspheres containing sulfur and nitrogen. Purpose. The invention relates to the technical fields of preparation of functional polymer materials and environmental protection, and particularly belongs to the field of waste water treatment containing heavy metal ions. Background technique [0002] For a long time, heavy metal wastewater treatment technology has been a research topic of widespread concern. Heavy metals are metabolic poisons and enzyme inhibitors that have nerve block and semi-permanent brain damage effects. Because heavy metals are difficult to be harmless through chemical or biological remediation processes, they are classified as environmental toxicants. Traditional chemical and physical methods to treat heavy metal wastewater, that is, neutralization and precipitation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/14B01J20/26B01J20/30C02F1/28C02F101/20C02F103/16
Inventor 邹路易顾文秀
Owner JIANGNAN UNIV
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