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Nano-iron oxide loaded reticular porous heavy metal adsorption material and preparation method

A nano-iron oxide, mesh-like porous technology, applied in chemical instruments and methods, alkali metal compounds, adsorbed water/sewage treatment, etc., can solve the problems of poor adaptability to wastewater, difficult to achieve results, and time-consuming strain breeding. , to achieve the effect of improving adsorption effect, improving efficiency and improving service life

Active Publication Date: 2015-08-19
HUNAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These synthetic adsorption materials often have problems such as high manufacturing cost, limited adsorption capacity, poor adaptability to actual wastewater, and difficulty in achieving the desired effect.
For biosorbents, microorganisms are generally selective to heavy metals. It is difficult to find a microorganism that is universally applicable to various heavy metal ions, and the selection of bacteria is time-consuming. There are few successful examples in the actual heavy metal wastewater treatment.

Method used

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  • Nano-iron oxide loaded reticular porous heavy metal adsorption material and preparation method
  • Nano-iron oxide loaded reticular porous heavy metal adsorption material and preparation method
  • Nano-iron oxide loaded reticular porous heavy metal adsorption material and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Mix diallylamine, chlorohydrin and potassium carbonate in a molar ratio of 1.5:1.0:1.0, first add 68.9mL of diallylamine and 68.9mL of water to a 500mL dripping solution with a condenser tube and constant pressure Add 16.92g of solid potassium carbonate to the funnel and mechanically stirred reactor, raise the temperature to 60°C, slowly add 25mL of chloroethanol dropwise, and finish dropping within 3 hours, then add 64.87g of potassium carbonate saturated solution dropwise, finish adding within 2 hours, continue React for 2 hours; transfer to a separatory funnel, let stand for 30 minutes, separate the liquids, dry the oil phase with anhydrous potassium carbonate, distill 19.7 mL of unreacted diallylamine into the next round of reaction; distill under reduced pressure to - 0.093MPa, collect 42.3mL of distillate at 117~121℃, which is the intermediate product diallyl hydroxyethylamine, the yield is 76.82%;

[0038] (2) Step (1) intermediate product diallyl hydroxyethy...

Embodiment 2

[0049] (1) Mix diallylamine, chloroethanol and potassium carbonate in a molar ratio of 2.0:1.0:1.02, first add 91.8mL of diallylamine and 91.8mL of water to a 500mL dripping solution with a condenser tube and constant pressure Add 17.25g of solid potassium carbonate to the funnel and mechanically stirred reactor, raise the temperature to 70°C, slowly add 25mL of chloroethanol dropwise, and finish dropping within 3 hours, then add 66.17g of saturated potassium carbonate solution dropwise, finish adding within 2 hours, continue React for 1.5h; transfer to a separatory funnel, let stand for 30min, separate the liquids, dry the oil phase with anhydrous potassium carbonate, distill 43.1mL of unreacted diallylamine into the next round of reaction; distill under reduced pressure to -0.093MPa, collect 45.5mL of distillate at 117~121℃, which is the intermediate product diallyl hydroxyethylamine, the yield is 78.95%;

[0050] (2) The intermediate product diallyl hydroxyethylamine obtain...

Embodiment 3

[0056] (1) Mix diallylamine, chloroethanol and potassium carbonate in a molar ratio of 2.5:1.0:1.05, first add 114.8mL of diallylamine and 114.8mL of water to a 500mL dripping solution with a condenser tube and constant pressure Add 17.76g of solid potassium carbonate to the funnel and mechanically stirred reactor, raise the temperature to 75°C, slowly add 25mL of chloroethanol dropwise, and finish dropping within 3 hours, then add 68.12g of potassium carbonate saturated solution dropwise, finish adding within 2 hours, continue React for 1 hour; transfer to a separatory funnel, let stand for 30 minutes, separate the liquids, dry the oil phase with anhydrous potassium carbonate, distill out 64.2 mL of unreacted diallylamine and enter the next round of reaction; distill under reduced pressure to - 0.093MPa, collect 46.2mL of distillate at 117~121℃, which is the intermediate product diallyl hydroxyethylamine, the yield is 80.12%;

[0057] (2) Step (1) obtained intermediate produc...

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Abstract

The invention discloses a nano-iron oxide loaded reticular porous heavy metal adsorption material and a preparation method. The method includes: firstly taking diallylamine and chloroethanol as raw materials, and adopting water as the solvent to synthesize diallyl ethylol amine, then subjecting the diallyl ethylol amine and terminal position dibromoalkane to quaternization to prepare bis(brominated diallyl hydroxyethyl alkylammonium) monomer; and then synthesizing a mesh porous material by means of free radical aqueous solution polymerization, then immersing the material into a ferric salt solution, conducting in situ synthesis of a hydroxyl-oxygen complex of Fe by controlling the Fe (III) hydrolysis, then converting the complex into iron oxide and loading the iron oxide on the porous material. The adsorption material provided by the invention has a large and regular pore structure, has good permeability to wastewater and high treatment efficiency. Due to high stability and dispersion of nano-iron oxide, the adsorption material has a high adsorption surface area, and the adsorption effect is improved. The product in the invention has the advantages of excellent elution regeneration performance, easy recovery of heavy metals, and long service life cycle, etc., thus being suitable for treatment of various heavy metal wastewater.

Description

technical field [0001] The invention belongs to the field of heavy metal sewage treatment, in particular to a mesh porous heavy metal adsorption material loaded with nano-iron oxide and a preparation method. Background technique [0002] Heavy metals are one of the most serious pollution to the environment and the most harmful to people's health. Compared with other pollutants, heavy metal pollution has the following characteristics: (1) A small amount can produce significant toxic effects; (2) It cannot be degraded by microorganisms; (3) After being ingested by organisms, it can multiply by thousands of times in higher organisms (4) It can accumulate in certain organs and cause cumulative poisoning. Due to the concealment, long-term and cumulative characteristics of heavy metal pollution to environmental media, the treatment is very difficult. It is a difficult problem in the current international environmental protection field, and it will also be a difficult problem that...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F1/62
Inventor 刘立华曾荣今杨刚刚唐安平周智华王易峰
Owner HUNAN UNIV OF SCI & TECH
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