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Amino magnetic nanoparticles immobilized on the surface of metal copper ions and its preparation method and application

A magnetic nanoparticle, surface immobilization technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of secondary pollution limitation, difficult to remove algal toxins, low efficiency, etc., to avoid secondary pollution, good practical value And the application prospect, the method is simple, practical and effective

Inactive Publication Date: 2012-02-22
FUDAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It is difficult for conventional water treatment technologies to remove trace amounts of algal toxins in water. On the contrary, some traditional treatment methods will destroy algal cells and release toxins; for more advanced methods such as chemical oxidation and biodegradation, the cost is too high and low Potency and possible secondary pollution limit their use

Method used

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  • Amino magnetic nanoparticles immobilized on the surface of metal copper ions and its preparation method and application
  • Amino magnetic nanoparticles immobilized on the surface of metal copper ions and its preparation method and application
  • Amino magnetic nanoparticles immobilized on the surface of metal copper ions and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1 Synthesis of Amino Magnetic Nanoparticles with Metal Ions Fixed on the Surface

[0024] The synthesis of the magnetic microsphere material with metal ions immobilized on the surface of aminoferroferric oxide is divided into three steps.

[0025] First, a hydrothermal method was used to synthesize ferroferric oxide magnetic nanomaterials: 1.0 g FeCl 3 ·6H 2 O was dissolved in 30 mL of ethylene glycol, and magnetically stirred for 0.5 h to obtain a yellow transparent solution. Then 4.0 g of anhydrous NaAc was added, and after magnetic stirring for 0.5 h, 3.6 g of 1,6-hexanediamine was added, and after magnetic stirring for 0.5 h, a brownish-yellow transparent solution was obtained. The resulting solution was transferred into a 200 mL Teflon-lined stainless steel reaction kettle. Put it in an oven at 200°C for 12 hours. Vacuum dry at 50°C for later use.

[0026] Secondly, carry out chemical modification on the surface of amino magnetic nanoparticles: dispers...

Embodiment 2

[0028] Example 2 The removal and high-performance liquid chromatography determination of MC-LR and MC-RR in the microcystin mixture

[0029] Add 100μL to a 1mL colorimetric tube with a concentration of 15μgmL -1 Mixture of microcystins MC-LR and MC-RR, add 10 μL to a concentration of 100 mg mL -1 Surface immobilization of Cu 2+ Amino ferroferroferric oxide magnetic nanomaterials were dispersed, diluted to 1 mL with deionized water, and shaken at room temperature for 5 min. Under the action of a magnetic field, the supernatant solution is separated from the precipitate; the supernatant is used for high performance liquid chromatography analysis. High performance liquid chromatography adopts Shimadzu LC-20AD system (Shimadzu Corp., Japan), autosampler and SPD-20AUV-vis detector, detection wavelength is 238nm, analytical column is a reversed-phase chromatographic column (150 × 2.1mm, 5μm , 300 C18, SinoChrom, Dalian Elite Company, China), the mobile phase A uses 0.05% TFA, t...

Embodiment 3-4

[0031] Adjust the final concentrations of MC-RR and MC-LR to 0.05, 0.5, 1.0, 2.0, 3.0, 4.0, 5.0 μg mL, respectively -1 , 20 μL sample injection, repeated 3 times, other conditions were the same as in Example 2, and the standard curve was drawn with the peak area of ​​the chromatographic peak versus the toxin content. Using the standard addition method, other conditions were the same as in Example 2, and the maximum loads of MC-RR and MC-LR were 60 μg and 20 μg, respectively.

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Abstract

The invention belongs to the technical field of inorganic materials and environmental treatment, in particular to a magnetic nanometer material with metal copper ions fixed on the surface, a preparation method and application thereof. The magnetic nano material is obtained by first synthesizing the magnetic nano material with amino groups on the surface, then chemically modifying the surface with adipoyl chloride and iminodiacetic acid, and then immobilizing metal copper ions. The magnetic nanoparticle immobilizing metal copper ions is used as a microadsorbent, has a large specific surface area, and can effectively remove microcystins (Microcystins, referred to as algal toxins) with a polypeptide structure in the environment, and the method is simple and effective. The removal efficiency of the invention for MC-LR, which has the highest content and the strongest toxicity in the microcystin family, can reach 100%, and the removal efficiency for MC-RR can reach 90.2%. The material has good practical value and application prospect in the fields of environmental governance and the like.

Description

technical field [0001] The invention belongs to the field of inorganic material synthesis and environmental technology, and specifically relates to a superparamagnetic amino-magnetic nanoparticle with superparamagnetic surface immobilized metal copper ions, a preparation method and application thereof. Background technique [0002] In recent years, the explosive reproduction of toxic cyanobacteria caused by eutrophication of water bodies has become a serious environmental pollution problem. As the most common type of hepatotoxin produced by freshwater cyanobacteria, microcystin is a cyclic seven-membered polypeptide compound with a branched chain of conjugated double bonds, and drinking water intake can strongly cause body poisoning. The types of microcystins are distinguished by the different amino acid groups at positions 2 and 4 in the cyclic polypeptide structure. The most common groups of Microcystin-LR (MC-LR) toxins are leucine and arginine respectively. acid. The t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/281B01J20/30
Inventor 邓春晖林爽林华清高明霞张祥民
Owner FUDAN UNIV
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