Water treatment method based on pollutant screening

A pollutant and water treatment technology, applied in biological water/sewage treatment, water/sludge/sewage treatment, water pollutants, etc., which can solve the problems of lack of rapid screening of iodine substitution, expensive instruments, and insufficient scanning speed. , to achieve reliable screening, good removal effect and good separation effect.

Active Publication Date: 2019-03-26
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the scanning speed of GC-MS / MS is not enough, and the instrument is expensive; LC-MS / MS detection is mainly for non-volatile organic pollutants, and the instrument is expensive and the operation is cumbersome
Therefore, there is still a lack of methods for rapid screening of iodine-substituted (-I) organic pollutants and nitrile (-CN) organic pollutants.

Method used

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  • Water treatment method based on pollutant screening
  • Water treatment method based on pollutant screening
  • Water treatment method based on pollutant screening

Examples

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example

[0124] General method: a solid phase extraction column with modified polystyrene-divinylbenzene filler and a solid phase extraction column with activated carbon filler are connected in series. The unloaded solid phase extraction column was eluted with dichloromethane, acetone and methanol solvents in sequence, and the solid phase extraction column was activated with methanol and ultrapure water; A solid-phase extraction column for adsorbing organic matter; nitrogen blowing the eluate after solid-phase extraction until it is completely dry, and it is dissolved in organic solvents such as n-hexane and dichloromethane.

[0125] The sample preparation and data collection in Example 1-2 are the same, and the specific process is as follows:

[0126] Preparation of the solid phase extraction column: Take the empty column tube of the solid phase extraction column with a volume of 6 mL, and place the sieve plate on the bottom of the column tube. The filler was Soxhlet extracted with dichlo...

example 1

[0130] After the sample to be tested is analyzed by two-dimensional gas chromatography-EI mass spectrometry, mass spectra arranged in order of mass-to-charge ratio are obtained, and some of the mass spectra are as follows Image 6 Shown. Take C 7 H 3 I 3 O 2 As an example, in this figure, m / z=119, m / z+381=500, a mass spectrum peak can be observed at m / z=500, and S / N> 3. R> 3%, there is this signal in the result of the corresponding shunt ECD detector, and S / N> 3. R> 3%, therefore, the test substance contains triiodo pollutants. It can be combined with NIST library for further identification.

[0131] Since iodine has been screened to replace organic pollutants, the water sample to be processed can be passed through a treatment facility, which is filled with hypoxic biochar and iron filings, and the halogenated contaminants are reduced and biodegraded for disposal. The water sample treatment device such as Figure 4 Shown.

example 2

[0133] After the sample to be tested is analyzed by two-dimensional gas chromatography-EI mass spectrometry, mass spectra arranged in order of mass-to-charge ratio are obtained, and some of the mass spectra are as follows Figure 7 Shown. Taking the existing diphenylacetonitrile as an example, in this figure, m / z=167, m / z+26=193, the mass spectrum peak can be observed at m / z=193, and S / N> 3. R> 3%, there is this signal in the result of the corresponding shunt ECD detector, and S / N> 3. R> 3%, therefore, the test substance contains nitrile organic pollutants. It can be combined with NIST library for further identification.

[0134] Since the nitrile organic pollutants have been screened out, the water sample to be treated can be passed through the treatment facility. The treatment facility is filled with aerobic biological activated carbon to adsorb and degrade the nitrile organic pollutants, thereby disposing of it. Sample processing device such as Figure 5 Shown.

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Abstract

The invention discloses a water treatment method based on pollutant screening. The water treatment method comprises the following steps: collecting a sample to tested from a water sample to be tested;carrying out two-dimensional gas-phase chromatographic analysis so as to obtain medium analyte; carrying out EI (Electronic Impact) ion source bombardment on a part of the analyte to generate ions, and carrying out mass spectrometry so as to obtain a first spectrum; carrying out ECD (Electron Capture Detector) on another part of the analyte so as to obtain a second spectrum; and screening the first spectrum by using a mass spectrum difference value method, comparing with the second spectrum, and confirming that the sample to be tested has iodine substituted organic pollutants or nitrile organic pollutants if effective signals representing iodine substituted organic pollutants or nitrile organic pollutants are available in screening results and the second spectrum also has the effective signals. By adopting the method, reliable screening on iodine substituted organic pollutants or nitrile organic pollutants can be conveniently and rapidly achieved, screened pollutants can be effectively treated, and the organic pollutants can be specifically removed.

Description

Technical field [0001] The invention relates to the screening of pollutants in water, and in particular to a water treatment method based on pollutant screening. Background technique [0002] At present, iodine substituted (-I) organic pollutants, nitrile (-CN) organic pollutants, etc. are frequently detected in sewage and surface water. The life and health risks caused by these water pollutants have aroused widespread concern. Most iodine-substituted (-I) organic pollutants and nitrile (-CN) organic pollutants are highly toxic and difficult to degrade. Screening and targeted treatment of organic pollutants in water bodies are particularly important to ensure water quality and safety. [0003] The existing detection methods for iodine-substituted (-I) organic pollutants and nitriles (-CN) organic pollutants are mainly gas chromatography-dual mass spectrometry (GC-MS / MS) or liquid chromatography-dual mass spectrometry. Detection (LC-MS / MS) method. However, GC-MS / MS scan speed is...

Claims

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Application Information

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IPC IPC(8): G01N30/02G01N30/06G01N30/70G01N30/72G01N30/86C02F3/10C02F3/28C02F101/38C02F101/36
CPCC02F3/106C02F3/2806C02F2101/36C02F2101/38G01N30/02G01N30/06G01N30/70G01N30/7206G01N30/8686G01N2030/025Y02W10/10
Inventor 吴乾元胡洪营张昕阳杜烨
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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