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A method for quantitatively collecting phenol in water environment through composite materials

A quantitative collection and composite material technology, applied in the direction of analysis materials, measurement devices, test sample preparation, etc., can solve the loss of sample authenticity, inevitable changes in the concentration or form of phenol pollutants, and the inability to truthfully reflect water quality to improve representativeness, accuracy, and guarantee authenticity

Active Publication Date: 2021-10-22
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

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  • A method for quantitatively collecting phenol in water environment through composite materials

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Embodiment 1

[0058] A method for quantitatively collecting phenol in water environment by composite material, the steps are as follows:

[0059] Hazelnut Shell Activated Carbon with Fe 3+ The salt solution is mixed according to the mass ratio = 2:1, and heated to 800°C by pyrolysis method in a tube furnace, heated for 2 hours, and allowed to cool to obtain a nano-zero-valent iron-carbon composite material. Take 10 mg of nano-zero-valent iron-carbon composite material and put it into a nylon membrane with a pore size of 0.22 μm. After placing it in the water environment to be tested for a period of 4 to 72 hours, use ultraviolet-visible spectroscopy to measure the accumulated concentration during this period. The amount of phenol and calculate the concentration of phenol in the monitored water environment.

Embodiment 2

[0061] A method for quantitatively collecting phenol in water environment by composite material, the steps are as follows:

[0062] Hazelnut Shell Activated Carbon with Fe 3+ The salt solution is mixed according to the mass ratio = 5:1, and heated to 800°C by pyrolysis method in a tube furnace, heated for 2 hours, and allowed to cool to obtain a nanometer zero-valent iron-carbon composite material. Take 10 mg of nano-zero-valent iron-carbon composite material and put it into a nylon membrane with a pore size of 0.22 μm. After placing it in the water environment to be tested for a period of 4 to 72 hours, use ultraviolet-visible spectroscopy to measure the accumulated concentration during this period. The amount of phenol and calculate the concentration of phenol in the monitored water environment.

Embodiment 3

[0064] A method for quantitatively collecting phenol in water environment by composite material, the steps are as follows:

[0065] Hazelnut Shell Activated Carbon with Fe 3+ The salt is mixed according to the mass ratio = 10:1. In a tube furnace, the pyrolysis method is used to heat to 800°C, heat for 2 hours, and let cool to obtain a nano-zero-valent iron-carbon composite material. Take 10 mg of nano-zero-valent iron-carbon composite material and put it into a nylon membrane with a pore size of 0.22 μm. After placing it in the water environment to be tested for a period of 4 to 72 hours, use ultraviolet-visible spectroscopy to measure the accumulated concentration during this period. The amount of phenol and calculate the concentration of phenol in the monitored water environment.

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Abstract

A method for quantitatively collecting phenol in the water environment through a composite material of the present invention, the steps are: (1) preparing a nano-zero-valent iron-carbon-based composite material that can quickly and efficiently combine phenol molecules; (2) combining the nano-zero-valent iron ‑The carbon-based composite material is placed 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 phenol molecules, and cannot leak the composite material. 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 that diffuses into the inner side is immediately combined by the composite material, thereby forming an interface between the inner and outer interfaces of the membrane or hydrogel. Constant concentration gradient; nanometer zero-valent iron on the composite can protect the accumulated phenol from dissolved oxygen and other oxidizing substances in the water environment, avoiding the problem of phenol instability during sampling.

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 through a composite material. 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 samples are adjusted t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/40G01N1/44G01N21/31
CPCG01N1/4005G01N1/4044G01N1/44G01N21/31G01N2001/4016
Inventor 范洪涛宋月先尤楠
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY