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Preparation method of nanometer Fe0/PP (Polyethylene Polyamine) composite chelating agent

A polyethylene polyamine and chelating agent technology, applied in chemical instruments and methods, water/sewage treatment, adsorption water/sewage treatment, etc., can solve problems such as complex process, poor chelating effect, increased treatment cost, etc., and achieve shortening The effect of process flow, reduction of processing cost, and improvement of processing capacity

Active Publication Date: 2013-08-21
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, currently commercially available chelating agents for Cr 6+ The chelation effect of chromium is very poor, and it usually needs to be reduced to Cr first 3+ , and then removed by chelation precipitation, the process is complicated and the treatment cost is increased

Method used

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  • Preparation method of nanometer Fe0/PP (Polyethylene Polyamine) composite chelating agent
  • Preparation method of nanometer Fe0/PP (Polyethylene Polyamine) composite chelating agent
  • Preparation method of nanometer Fe0/PP (Polyethylene Polyamine) composite chelating agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Taking 1 g of raw material polyethylene polyamine (referred to as PP) as an example, the preparation of nano-Fe 0 The method of / polyethylene polyamine complex chelating agent is:

[0015] First weigh 11.12g FeSO 4 ·7H 2 O was dissolved in 200mL of 30% ethanol solution, fully dissolved and transferred to a 500mL three-necked flask, and 200mL of NaBH with a concentration of 0.12mol / L was added dropwise. 4 solution, shaken for 30min, separated by suction filtration, dried to constant weight at 0.1MPa, 60°C to obtain nano-Fe 0 .

[0016] Then weigh 1 g of polyethylene polyamine with a molecular weight of about 440 (produced by Nanjing Gutian Chemical Co., Ltd., an amber transparent viscous liquid with an ammonia smell), dissolve it in 80 mL of water, stir and mix well, and add 2 g of the above-prepared nano-Fe 0 , drop 2mL glutaraldehyde, polyethylene polyamine and water, nano-Fe 0 , The mass ratio of the cross-linking agent is 1:80:2:1.5, stirred and reacted at 25°C f...

Embodiment 2

[0018] Taking 1 g of raw material polyethylene polyamine as an example, prepare nano-Fe 0 The method of polyethylene polyamine complex chelating agent is: take polyethylene polyamine 1g, be dissolved in 50mL water, stir and mix, add 1g commercially available nanometer Fe 0 , drop 1mL glutaraldehyde, polyethylene polyamine and water, nano-Fe 0 , The mass ratio of the crosslinking agent is 1:50:1:1, stirred and reacted at 25°C for 3 hours, dried at 0.1MPa, 60°C to constant weight, washed twice with distilled water, separated by suction filtration, dried at 0.1MPa, 60°C , to obtain nano-Fe 0 / Polyethylene polyamine complex chelating agent.

Embodiment 3

[0020] Taking 1 g of raw material polyethylene polyamine as an example, prepare nano-Fe 0 The method of / polyethylene polyamine compound chelating agent is: take polyethylene polyamine 1g, be dissolved in 100mL water, stir and mix, add 3g commercially available nanometer Fe 0 , drop 2mL glutaraldehyde, polyethylene polyamine and water, nano-Fe 0 , The mass ratio of the cross-linking agent is 1:100:3:2, stirred and reacted at 25°C for 3 hours, dried at 0.1MPa at 60°C to constant weight, washed twice with distilled water, separated by suction filtration, dried at 0.1MPa at 60°C, get nano Fe 0 / Polyethylene polyamine complex chelating agent.

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Abstract

The invention relates to a preparation method of a nanometer FeO / PP (Polyethylene Polyamine) composite chelating agent. The method comprises the following steps: by taking the PP as a raw material and glutaraldehyde as a cross-linking agent, performing a crosslinking polymerization reaction among the PP, the glutaraldehyde and nanometer FeO, thereby synthesizing a novel nanometer FeO composite chelating adsorbent. The composite chelating adsorbent has the functions of reduction and chelating adsorption. By the cooperation of the reduction function and the chelating function, the treatment capability of heavy metal ions can be improved effectively. In addition, by utilizing the method, the Cr6<+> can be reduced and adsorbed directly, so that the technological process is shortened. Therefore, the treatment cost is lowered greatly; and the treatment efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of research on chelating agents used in the process of wastewater treatment research, in particular to a nano-Fe 0 The preparation method of polyethylene polyamine complex chelating agent. Background technique [0002] Chromium is a typical heavy metal pollutant. In nature, chromium mainly exists in the form of trivalent chromium and hexavalent chromium. In industrial wastewater, chromium is mainly formed as dichromate ion (Cr 2 o 7 2- ), chromate ion (CrO 4 2- ) and other forms of hexavalent chromium, hexavalent chromium is a strong mutagenic substance, and is easily absorbed by the human body, easy to accumulate in the body, and can cause skin and respiratory ulcers, meningitis, lung cancer, etc. Conventional heavy metal ion treatment methods include chelation precipitation, adsorption, ion exchange, etc., among which chelation precipitation is an effective way to remove Cr 6+ Methods. However, cu...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F1/70C02F1/62
Inventor 刘转年刘亦平刘咏梅
Owner XIAN UNIV OF SCI & TECH
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