Efficient heavy-metal-ion absorbent material and preparation method thereof

A technology of heavy metal ions and adsorption materials, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the lack of designability and controllability of the adsorption process, and the difficulty in realizing heavy metal recovery and reuse of adsorbents , It is difficult to adsorb and separate heavy metals and other problems, and achieve good heavy metal desorption and regeneration performance, good desorption and desorption performance, and excellent adsorption effect

Active Publication Date: 2015-04-01
HUNAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it has the advantages of high treatment efficiency, low investment, low operating cost, and no secondary pollution, microorganisms are selective to heavy metals and have poor adaptability to the actual heavy metal wastewater environment. Microorganisms, and the selection and breeding of strains is time-consuming, therefore, hindering its popularization and application
It can be seen that the above-mentioned adsorbents studied and applied have certain shortcomings and limitations, especially the use of these adsorbents to treat heavy metal wastewater is difficult to achieve heavy metal recovery and adsorbent reuse, and the adsorption process lacks designability and controllability. Difficult to adsorb and separate heavy metals as one would expect

Method used

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  • Efficient heavy-metal-ion absorbent material and preparation method thereof
  • Efficient heavy-metal-ion absorbent material and preparation method thereof
  • Efficient heavy-metal-ion absorbent material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Mix diallylamine, ethyl chloroacetate and potassium carbonate in a molar ratio of 1.2:1:1, first add 55.4mL of diallylamine and 55.4mL of water to a 500mL Add 17.02g of solid potassium carbonate to the dropping funnel and mechanically stirred reactor, raise the temperature to 50°C, slowly add 40mL of ethyl chloroacetate dropwise, finish dropping within 3 hours, then add 65.3g of potassium carbonate saturated solution dropwise, within 2h After adding, continue to react for 2h;

[0033] (2) Transfer the above liquid phase into a separatory funnel, let it stand for 30 minutes, separate the liquids, extract the water phase with ether for 3 times, combine the extracts, and distill off the solvent to obtain 5.1 mL of residue; Potassium drying, distill 8.5mL of unreacted diallylamine into the next round of reaction, combine the distillate with the extracted distillate, distill under reduced pressure to -0.093MPa, collect 56.4mL of distillate at 126~130℃, That is, the subs...

Embodiment 2

[0039] (1) Mix diallylamine, ethyl chloroacetate and potassium carbonate in a molar ratio of 1.6:1:1.02, first add 73.9mL of diallylamine and 73.9mL of water to a 500mL Add 17.37g of solid potassium carbonate to the dropping funnel and mechanically stirred reactor, raise the temperature to 60°C, slowly add 40mL of ethyl chloroacetate dropwise, finish dropping within 3 hours, then add 66.62g of saturated potassium carbonate solution dropwise, within 2h After adding, continue to react for 2h;

[0040] (2) Transfer the above liquid phase into a separatory funnel, let it stand for 30 minutes, separate the liquids, extract the water phase twice with ethyl acetate, combine the extracts, and distill off the solvent to obtain 5.4 mL of distilled residue; Water was dried with potassium carbonate, and 25.2 mL of unreacted diallylamine was distilled off to enter the next round of reaction. The distillate was combined with the extracted distillate, distilled under reduced pressure to -0.0...

Embodiment 3

[0044] (1) Mix diallylamine, ethyl chloroacetate and potassium carbonate in a molar ratio of 2.0:1:1.05, first add 92.4mL of diallylamine and 92.4mL of water to a 500mL Add 17.88g of solid potassium carbonate to the dropping funnel and mechanically stirred reactor, raise the temperature to 70°C, slowly add 40mL of ethyl chloroacetate dropwise, finish dropping within 3 hours, then add dropwise 68.57g of potassium carbonate saturated solution, within 2h After adding, continue to react for 2h;

[0045] (2) Transfer the above liquid phase into a separatory funnel, let it stand for 30 minutes, separate the liquids, extract the water phase with ethyl acetate for 3 times, combine the extracts, and evaporate the solvent to obtain 6.7mL distillate; Water was dried with potassium carbonate, and 44.9 mL of unreacted diallylamine was distilled off to enter the next round of reaction; the distilled residue was combined with the extracted distilled residue, distilled under reduced pressure ...

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Abstract

The invention discloses an efficient heavy-metal-ion absorbent material and a preparation method thereof. The preparation method comprises the following steps: by taking diallylamine, halogenated ethanol, halogenated acetone or halogenated ethyl acetate as raw materials, and taking water as a reaction medium, preparing substituted tertiary diallylamine under an alkaline condition, and introducing -OH, -CO, -COOR and the like having relatively affinity action on heavy metal ions in molecules; purifying for refinining, and then performing quaternary ammonium with end-site dibromoalkane in a polar organic solvent for synthesizing monomer molecules containing two groups of diallyl quaternary ammonium salt groups in the molecules; and by taking water-soluble azo initiator as an initiator, synthesizing the heavy-metal absorbent material in a manner of aqueous solution polymerization. The absorbent material disclosed by the invention is good in permeability, strong in adsorption capacity, excellent in heavy metal recovery, elution regeneration and cyclic use performance, suitable for adsorption treatments on a plurality of types of heavy-metal-ion wastewater, and wide in popularization and application values.

Description

technical field [0001] The invention belongs to the field of heavy metal sewage treatment, in particular to a high-efficiency heavy metal ion adsorption material and a preparation method thereof. Background technique [0002] Heavy metals such as lead, cadmium, mercury, chromium, and metalloid arsenic have significant toxicity to humans, animals, plants, and microorganisms, cannot be degraded by microorganisms, and are easy to accumulate in organisms to cause significant toxic effects. extremely polluting. Heavy metal pollution has become a major global environmental problem, and the prevention and control of heavy metal pollution has always been a difficulty and research hotspot in the international environmental protection community. my country is in a period of rapid economic development, and the mining, smelting, processing and product manufacturing activities of heavy metals are increasing day by day, causing many heavy metals to enter the environment. In recent years...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F1/62
CPCB01J20/26B01J20/3085B01J2220/445C02F1/285C02F1/62
Inventor 刘立华杨刚刚丁丽莉周智华王易峰唐安平
Owner HUNAN UNIV OF SCI & TECH
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