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A method for quantitatively collecting phenol in water environment and making the collected phenol exist stably

A technology for quantitative collection and water environment, applied in the field of quantitative collection of phenol in water environment and stable existence of collected phenol, which can solve the loss of sample authenticity, inevitable changes in the concentration or form of phenol pollutants, and influence on the representative of environmental monitoring results. To improve the representativeness and accuracy, and ensure the authenticity

Active Publication Date: 2021-12-14
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the process of sample collection, storage and transportation, the concentration or form of phenol pollutants will inevitably change, and the authenticity of the sample will be lost, which will directly affect the representativeness and accuracy of the environmental monitoring results, and cannot truthfully reflect the water quality. Happening

Method used

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  • A method for quantitatively collecting phenol in water environment and making the collected phenol exist stably

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Take 10 mg of a blend of nano-zero-valent iron (with a particle size between 10nm-100 μm) and activated carbon containing 0.1% (mass percentage) (that is, the nano-zero-valent iron in the blend is 0.1% by mass) After being put into the 0.22μm nylon membrane and placed in the water environment to be tested for a period of 4 to 72 hours, the amount of phenol accumulated during this period of time was measured by ultraviolet-visible spectroscopy. The phenol stability diagram during this period of time is shown in figure 1 Shown, and calculate the concentration of phenol in the monitored water environment.

Embodiment 2

[0048] Take 10 mg of a blend of nano-zero-valent iron (with a particle size between 10nm-100 μm) and activated carbon containing 0.5% (mass percentage) (that is, the nano-zero-valent iron in the blend is 0.5% by mass). After being placed in a 0.22 μm nylon membrane for a period of 4 to 72 hours in the water environment to be tested, the amount of phenol accumulated during this time period was measured by UV-visible spectroscopy, and the phenol concentration in the monitored water environment was calculated. concentration.

Embodiment 3

[0050] Take 10 mg of a blend of nano-zero-valent iron (with a particle size between 10nm-100 μm) and activated carbon containing 1% (mass percentage) (that is, the nano-zero-valent iron in the blend is 1% by mass) After being placed in a 0.22 μm nylon membrane for a period of 4 to 72 hours in the water environment to be tested, the amount of phenol accumulated during this time period was measured by UV-visible spectroscopy, and the phenol concentration in the monitored water environment was calculated. concentration.

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Abstract

A method for quantitatively collecting phenol in the water environment of the present invention and making the collected phenol exist stably, the steps are: (1) preparing a blend of zero-valent metal powder and functional material capable of quickly and efficiently combining phenol molecules; (2) ) placing the blend in a hydrogel or a membrane with a certain pore size that can effectively control the diffusion of phenol molecules, does not chemically interact with the phenol molecules, and cannot leak the blend. Within a certain period of time, using the diffusion of phenol in the membrane or hydrogel in the water system to be tested, the phenol diffused into the inner side is immediately combined by the blend of zero-valent metal powder and functional materials, so that the membrane or hydrogel A constant concentration gradient is formed between the inner and outer interfaces; the inner zero-valent metal powder can protect the accumulated phenol from the influence of dissolved oxygen and other oxidizing substances in the water environment, avoiding the instability of phenol during the sampling process The problem.

Description

Technical field: [0001] The invention belongs to the technical field of phenol environmental monitoring, and in particular relates to a method for quantitatively collecting phenol in a water environment and making the collected phenol exist stably. Background technique: [0002] Phenol is a protoplasmic poison and a pollutant that is harmful to water pollution. Under normal circumstances, if the phenolic compound contained in water exceeds 0.1 per thousand, the water cannot meet the drinking water standard and is harmful to the human body. In February 2012, a phenol pollution incident occurred in Jiangsu, which caused difficulties in drinking water and greatly affected the production and life of residents in the local and surrounding areas. The monitoring of phenol has attracted people's attention. [0003] Phenol is unstable, reductive and volatile, so it is best to measure it immediately after sampling. However, most samples cannot be analyzed on-site. Instead, the sample...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28G01N21/25
CPCG01N1/28G01N21/25
Inventor 尤楠黄泽义裴志洋孟卓范洪涛
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY