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Method for selectively and quantitatively collecting arsenic in water environment

A quantitative collection and water environment technology, applied in the preparation of test samples, sampling devices, etc., to achieve the effect of simple collection devices, avoid pollution, and save manpower and material resources

Inactive Publication Date: 2015-06-03
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the deficiencies of the existing manual sampling methods, the present invention provides a method for selectively and quantitatively collecting arsenic in the water environment. The exchange process of arsenic is controlled through an inert semi-permeable membrane or hydrogel, and the arsenic has specificity for arsenic. Molecularly imprinted polymers with selective binding and enrichment to realize one-way diffusion of arsenic, thereby achieving quantitative collection of arsenic in water environment

Method used

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  • Method for selectively and quantitatively collecting arsenic in water environment

Examples

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Effect test

Embodiment 1

[0034] Using 100 mg molecularly imprinted polymer, place it in the collection device together with the dialysis membrane, seal the collection device with a cellulose film, and then place 36 identical collection devices in a natural fresh water environment for 1 year. 3 months (calculated as 30 days), use atomic absorption spectrometry to determine As( ), and calculate the As( ) Average concentration.

[0035] At the same time, the conventional sampling method is used to take water samples from the collected waters every three days and use atomic absorption spectrometry to determine As ( )concentration. As measured by the present invention during the monitoring period ( ) And the As( ) Content ratio is in the range of 85%-120%, indicating that the present invention can accurately monitor As( ) Contaminate or contain As( ) In the water system of As( )content.

Embodiment 2

[0037] Using 80 mg molecularly imprinted polymer, put it together with chromatographic paper in the collection device, seal the collection device with a cellulose film, and then put 30 identical collection devices in the natural mineralized water system for 10 months. Take 3 out every month (calculated as 30 days), and determine As( ), and calculate the As( ), while using conventional sampling methods to take water samples collected every three days and use atomic absorption spectrometry to determine As( )concentration.

[0038] As measured by the present invention during the monitoring period ( ) And the As( ) Content ratio is in the range of 85%-120%, indicating that the present invention can accurately monitor As( ) Contaminate or contain As( ) In the water system of As( )content.

Embodiment 3

[0040] Use 50 mg of molecularly imprinted polymer, put it in the collection device together with the dialysis membrane, seal the collection device with a cellulose film, put 12 identical collection devices in the sewage, leave it for 1 month, and take it out every week 3, using atomic absorption spectrometry to determine As( ), and calculate the As( ), while using conventional sampling methods to take water samples collected every three days and use atomic absorption spectrometry to determine As( )concentration.

[0041] As measured by the present invention during the monitoring period ( ) And the As( ) Content ratio is in the range of 85%-120%, indicating that the present invention can accurately monitor As( ) Contaminate or contain As( ) In the water system of As( )content.

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Abstract

The invention belongs to the field of environment monitoring, and particularly provides a method for selectively and quantitatively collecting arsenic in a water environment. According to key points of the invention, the method comprises the following steps of: putting 1-100 mg of a molecular imprinting polymer which has a specific selective combination effect on arsenic into a collecting device together with a semitransparent film or aquagel; sealing with a cellulose film; standing the device in the water environment for one hour to one year; taking the device out; measuring the concentration of arsenic; and computing the average concentration of arsenic in a water body within standing time. The method disclosed by the invention is economic and practical, the collecting device is simple, labor workload is lowered greatly, manpower and materials are saved, and the conventional artificial collecting environment system sample mode is effectively supplemented and perfected.

Description

technical field [0001] The invention belongs to the field of environmental monitoring, in particular to a method for selectively and quantitatively collecting arsenic in water environment. Background technique [0002] Arsenic is a metalloid known for its toxicity, but because its behavior and source are similar to heavy metals, it is often listed as a heavy metal for research. There are trivalent inorganic As(Ⅲ), pentavalent inorganic As(V) and organic arsenic in nature, among which inorganic arsenic is highly toxic. Arsenic compounds can enter the human body through respiratory tract, esophagus and skin contact, causing damage to many organs in the human body, and are important carcinogens in the environment. Before large-scale human economic activities, arsenic was in the balance of the natural cycle. Due to the expansion of human industrial activities, the migration and transformation of arsenic in the environment was accelerated, which caused the accumulation of arseni...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/10G01N1/40
Inventor 孙挺范洪涛董佳刘畅
Owner NORTHEASTERN UNIV LIAONING
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