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Organic inorganic hybridized material for removing agent of heavy metal ions

A technology for heavy metal ions and hybrid materials, applied in the field of organic-inorganic hybrid materials, can solve the problems of low concentration of heavy metal ions, difficulty in post-processing, recovery and reuse of production residues, and achieves a simple preparation process and is suitable for large-scale industrialization. Production, high-sensitivity effects

Active Publication Date: 2012-07-04
WUHAN KAIDI ENG TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the problem that this method exists is: post-processing, recovery and reuse of production residue are difficult
However, the concentration of heavy metal ions adsorbed by this resin is low, and a large amount of resin is required

Method used

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  • Organic inorganic hybridized material for removing agent of heavy metal ions
  • Organic inorganic hybridized material for removing agent of heavy metal ions
  • Organic inorganic hybridized material for removing agent of heavy metal ions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Porous silica preparation

[0030] At room temperature, 10 mL of ethyl acetate was added dropwise to 100 mL of water glass containing 5 g of cetyl ammonium bromide (CTAB), and the pH value of the solution was adjusted to 9. After stirring at room temperature for 2 hours overnight, the resulting The product was separated by centrifugation, washed with water and ethanol three times respectively, then dried, and finally calcined at 500°C under an air atmosphere to obtain porous silica. For the following examples.

Embodiment 2

[0032] Preparation of Heavy Metal Ion Removal Agent 1

[0033] First, a chemical sensor 1 that selectively recognizes mercury ions is synthesized. The chemical sensor is synthesized by introducing a chelating group iminooxalic acid that has the ability to coordinate to mercury ions into a quinoline derivative of a fluorescent chromophore. The route is as follows, then take 10g of chemical sensor 1 and 20g of porous silica, add 100mL of 95% ethanol by volume, continue to stir for 12h and then spray dry at 100°C to obtain the removal agent 1 for treating heavy metal ions in wastewater.

[0034]

[0035] In the reaction formula,

[0036] (i) a: triethylamine: tert-butyl bromoacetate=1: 2.2: 2.1 (molar ratio), solvent is acetonitrile, reflux reaction;

[0037] (ii) b: palladium carbon=10: 1 (molar ratio), solvent: methanol;

[0038](iii) methyl iodide: c=1: 1 (molar ratio), dichloromethane is used as solvent, room temperature;

[0039] (iv) trifluoroacetic acid: dichlorometh...

Embodiment 3

[0042] Preparation of Heavy Metal Ion Removal Agent 2

[0043] First, a chemical sensor 2 that can selectively recognize various ions was synthesized. This chemical sensor was synthesized by introducing o-phenanthroline, which has a strong coordination ability to heavy metal ions, into a fluorescent chromophore imidazole derivative. The synthetic route is as follows As shown, then take 10g of chemical sensor 2 and 20g of porous silica, add 100mL of 95% ethanol by volume concentration, continue to stir and react for 12h, and then spray dry at 100°C to obtain remover 2 for treating heavy metal ions in wastewater.

[0044]

[0045] In the reaction formula,

[0046] (1) compound 1: benzaldehyde: p-phenylenediamine: ammonium acetate=1: 1: 1.2: 5 (molar ratio), 120 DEG C of reaction temperature, solvent: glacial acetic acid;

[0047] (2) methyl iodide: 2=1: 1 (molar ratio), dichloromethane is made solvent, room temperature;

[0048] (3) 3: triethylamine: chloropropyl trimethoxy...

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Abstract

The invention relates to an organic inorganic hybridized material for removing heavy metal ions from sewage. The material is composed of a carrier nanometer silicon dioxide and a chemical sensor, wherein the chemical sensor is capable of selectively identifying and adsorbing the heavy metal ions; the mass percent of the chemical sensor to the nanometer silicon dioxide is (10%-50%):(50%-90%); the grain size of the hybridized material is 30-300nm; and the specific surface area is 100-900m<2> / g. A preparation method comprises the following steps: taking rice husk ash generated from rice husk combustion as raw material and preparing porous silicon dioxide, and then bonding the chemical sensor capable of selectively identifying and adsorbing the heavy metal ions with the surface of the porous silicon dioxide, thereby obtaining the organic inorganic hybridized material. The chemical sensor with excellent adsorbing property for the heavy metal ions is bonded with the surface of the porous SiO2, so that the material is suitable for being used as a removing agent for the heavy metal ions in industrial sewage. The preparation method for the organic inorganic hybridized material is simple; the capability of selectively identifying and adsorbing the heavy metal ions is strong; and the organic inorganic hybridized material has the advantages of high processing speed, regenerating property, and the like.

Description

technical field [0001] The invention relates to the technical field of water treatment, and mainly relates to the treatment of heavy metal ions in industrial waste water, in particular to an organic-inorganic hybrid material for treating water polluted by heavy metal ions. Background technique [0002] Heavy metals widely exist in nature, some of which have important functions in the life process, while other elements are extremely toxic to organisms at very low concentrations, and have great significance for the detection and separation of heavy metal ions in wastewater. Significance. Heavy metal (such as containing silver, nickel, mercury, chromium, lead, etc.) wastewater is one of the most serious environmental pollution and one of the most harmful industrial wastewater to humans, and its water quality and quantity are related to the production process. Heavy metals in wastewater generally cannot be decomposed, but can only transfer their location and change their physic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/28C02F1/28G01N21/64C02F101/20C02F101/22
Inventor 方章建张岩丰郑兴才薛永杰陶磊明
Owner WUHAN KAIDI ENG TECH RES INST CO LTD
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