A water quality monitoring-oriented trap for trace polar organic pollutants

A technology for polar organic pollutants, applied in the preparation of test samples, sampling devices, etc., can solve the problem of poor adsorption range and adsorption efficiency of polar organic pollutants, and no report on passive sampling technology for polar organic pollutants , Sampling cannot be carried out normally, etc., to achieve the effect of efficient ecological risk assessment, sampling technology principle and sampler making simple, shortening sample collection time

Inactive Publication Date: 2020-02-21
CHINA NAT RES INST OF FOOD & FERMENTATION IND CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, due to long-term sampling in natural water bodies, biofouling is prone to occur, and the biomass blocks the pore size of the outer polymer membrane of the sampler, which affects the sampling rate, resulting in the failure of normal sampling
The adsorbent used in the traditional POCIS sampler is mainly Oasis HLB adsorbent, which uses the principle of reversed-phase adsorption to collect polar and non-polar organic pollutants in water. Adsorption mode, so its adsorption range and adsorption efficiency for polar organic pollutants are not high
At present, there is no report on the passive sampling technology of polar organic pollutants developed by the mechanism of mixed adsorption mode (reversed phase adsorption and ion exchange adsorption)

Method used

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  • A water quality monitoring-oriented trap for trace polar organic pollutants
  • A water quality monitoring-oriented trap for trace polar organic pollutants
  • A water quality monitoring-oriented trap for trace polar organic pollutants

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1: Enrichment kinetics experiment of typical PPCPs drugs in water by polar organic pollutant trap

[0027] Select a large-scale urban sewage treatment plant in Shanghai, set up a point in the water treatment process section, suspend the sampling device of the present invention in the water, and place it for 1 day, 3 days, 5 days, 7 days, 14 days, and 21 days respectively. Day and 28 days later, it was removed for elution analysis. The invention can enrich more than ten kinds of pharmaceutical polar pollutants at the same time, and can enrich organic substances that cannot be enriched by active sampling method (solid phase extraction). From the cumulative enrichment concentrations of five polar drugs with high detection rates, sulfapyridine, sulfamethoxazole, ketoprofen, fluthiamphenicol and ofloxacin ( figure 2 , 3 , 4, 5, 6) It can be seen that these five pollutants can reach the enrichment equilibrium within 4 weeks or even a shorter period of time.

Embodiment 2

[0028] Example 2: Broad-spectrum adsorption verification experiment of polar organic pollutant trap

[0029] Take the polar organic pollutant trap on the 28th day in Example 1, analyze the polar organic pollutants adsorbed by it, and take 5 L of water samples on the spot on the 28th day, and carry out enrichment by solid phase extraction after transporting back to the laboratory , concentration, determination. And compare the polar organic pollutants detected by the two methods. Table 1 shows the comparison of the implementation steps of solid phase extraction and polar organic pollutant trap methods and the comparison of the differences in the types of pollutants screened.

[0030] Table 1 Comparison of the list of pharmaceutical pollutants screened by different monitoring methods in a certain urban sewage plant

[0031]

[0032] It can be seen from the above table that the sample pretreatment process of the polar organic pollutant trap is simpler, and more pollutants ca...

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Abstract

The invention relates to an accumulative sampling device using a composite characteristic adsorbent as a receiving phase and used for monitoring the concentration of polar organic pollutants in water. The accumulative sampling device is based on a synthetic high molecular membrane material and a mixed-mode solid phase extraction adsorbent, the composite adsorbent is placed between two layers of high molecular membranes to form a sampler adopting a sandwich structure, and the accumulative sampling device can enrich a variety of the polar organic pollutants in water at the same time. In allusion to differences among the polar organic pollutants in water, the accumulative sampling device uses five characteristic solid phase extraction adsorbents to form the mixed-mode adsorbent, and has a polarity range-widened reverse phase adsorption effect, a weak anion exchange effect and a weak cation exchange effect at the same time, and has a broad-spectrum adsorption effect on the polar organic pollutants in water; meanwhile, the accumulative sampling device uses a high molecular osmotic membrane with a specific pore size range as an outer membrane, so that free passing of water, compounds in a freely dissolved state and compounds in a colloidal state can be ensured, the adsorption equilibrium time is shortened, and thus the accumulative sampling device can be used as a balanced sampler for monitoring the organic trace pollutants in water and performing biological simulative sampling.

Description

technical field [0001] The invention relates to a capture device for enriching and monitoring polar organic pollutants in water with a composite characteristic adsorbent as the receiving phase. Due to the limitation of the pore size of the external polymer membrane, only free dissolved state and colloidal state are allowed. The polar organic pollutants in the form enter the trap and are adsorbed, which truly reflects the biologically available concentration of polar organic pollutants in water. It can be used to simulate biological monitoring, evaluate the ecotoxicological effects of polar pollutants, and screen " Prioritize the control of pollutants” and rationally manage the use and discharge of polar pollutants. Background technique [0002] The invention relates to a capture device for enriching and monitoring polar organic pollutants in water with a composite characteristic adsorbent as the receiving phase. Due to the limitation of the pore size of the external polymer ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/10G01N1/34
CPCG01N1/10G01N1/34
Inventor 柯润辉黄清辉蒋愉林尹建军
Owner CHINA NAT RES INST OF FOOD & FERMENTATION IND CO LTD
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