Passive sampling technology aiming at anionic polar organic pollutant in water

A passive sampler and anion technology, applied in the direction of sampling device, test sample preparation, etc., can solve the problem that the passive sampling technology of polar organic pollutants is rare, and the passive sampling technology of anionic organic pollutants has not been reported yet. high cost issues

Inactive Publication Date: 2012-10-17
NANKAI UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

Passive sampling technology has a good application prospect in the monitoring of pollutants and the study of environmental processes, but most of the current passive sampling devices are designed for collecting non-polar organic pollutants or heavy metal pollutants, and for polar organic pollutants Research on passive sampling technology is rare
Some foreign researchers have established a passive sampling device for polar drugs and organochlorine pesticides with N-vinylpyrrolidone-divinylbenzene copolymer as the receiving phase. Non-polar organic pollutants can be collected, but the cost is relatively high, and only a few passive sampling studies of polar pollutants have been reported
At present, there is no report on the passive sampling technology of anionic organic pollutants developed by the ion exchange mechanism.

Method used

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  • Passive sampling technology aiming at anionic polar organic pollutant in water
  • Passive sampling technology aiming at anionic polar organic pollutant in water
  • Passive sampling technology aiming at anionic polar organic pollutant in water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1: In 4L of aqueous solution containing perfluorobutyric acid (PFBA) and perfluorohexanesulfonic acid (PFHxS) with a concentration of 5 μg / L respectively, put an anion exchange resin passive sampling device and hang it in the aqueous solution Take passive sampling. After 12 hours, the sampling was finished, the sampler was rinsed with clean water, and the sampler was freeze-dried to remove residual moisture. After freeze-drying, open the sampler, transfer the receiving phase of the anion exchange resin to a 15 mL polypropylene centrifuge tube, and elute with 10 mL of methanol solution containing 0.5% KOH at 30°C for 3 times, 1 hour each time. The eluate was collected three times, blown with nitrogen to nearly dryness and constant volume.

[0016] The measured concentrations of the target compounds in the sampler were: 2.6 μg / g (PFBA) and 2.4 μg / g (PFHxS).

Embodiment 2

[0017] Embodiment 2: A 24-hour passive sampling experiment was carried out in the same system as in Example 1. Sampler sample processing method is the same as Example 1. The measured concentrations of the target compounds in the sampler were: 5.1 μg / g (PFBA) and 2.6 μg / g (PFHxS).

Embodiment 3

[0018] Embodiment 3: A 48-hour passive sampling experiment was carried out in the same system as in Example 1. Sampler sample processing method is the same as Example 1. The measured concentrations of the target compounds in the sampler were: 10.0 μg / g (PFBA) and 3.0 μg / g (PFHxS).

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Abstract

The invention discloses a novel passive sampling device and related technology for monitoring anionic polar organic pollutants in water by using an anion exchange resin as a receiving phase. The anion exchange resin is placed between two layers of polyether sulfone membranes, which are fixed by cyclic organic glass flanges and silicone pads. The device can be suspended in the water to carry out passive collection on anionic polar organic pollutants dissolved in the water. After the passive sampling, the sampler is cleaned and treated with freeze drying; then the resin receiving phase is moved out; and the sample is treated with fractional extraction by alkaliferous methanol; and the extracting solution is concentrated and analyzed by instrument. The simulation results show that the sampling device can effectively acquire anionic polar organic pollutants in the aqueous solution. Taking perfluorobutyric acid and perfluorohexanesulfonic acid for example, concentrations of the two substances increase linearly with time in the receiving phase of the sampler in certain period, and concentration in the receiving phase is higher than that of water environment by 3-4 orders of magnitude.

Description

technical field [0001] The invention relates to a new passive sampling device and sample processing technology for collecting and monitoring traces of anion-type polar organic pollutants in water bodies with anion exchange resin as a receiving phase. technical background [0002] Perfluorinated compounds in environmental waters are destructive to human health and environmental ecology. In order to meet the requirements of environmental legislation and protect human health and environmental ecology, it is necessary to detect such pollutants in environmental waters. On-site sampling and bringing it back to the laboratory for enrichment analysis is the most commonly used method for traditional environmental water quality monitoring. However, the traditional active sampling monitoring method has many limitations, such as cumbersome steps, high cost, and the analysis results can only represent the instantaneous situation, it is not suitable for monitoring pollutants whose concent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/10G01N1/40
Inventor 汪磊王若男杨锦孙红文张宪忠杨璐榕
Owner NANKAI UNIV
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