Active sampler for water persistent organic pollutants based on suction filtration and preconcentration

An organic pollutant, active technology, applied in sampling, instruments, scientific instruments, etc., can solve the problems of high pressure for collecting water samples, restricting the efficiency of sample collection and analysis, etc., to achieve the effect of small manpower requirements and simple equipment operation.

Inactive Publication Date: 2016-07-13
TIANJIN ACADEMY OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the concentration of POPs in the target water body is usually low (even lower than the detection limit), the field work needs to collect water samples under high pressure, and at the same time, the collected water samples must be quickly transferred to the laboratory for extraction analysis, which is to a large extent Restricted sample collection and analysis efficiency

Method used

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  • Active sampler for water persistent organic pollutants based on suction filtration and preconcentration
  • Active sampler for water persistent organic pollutants based on suction filtration and preconcentration
  • Active sampler for water persistent organic pollutants based on suction filtration and preconcentration

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Effect test

Embodiment 1

[0035] The present invention is described in detail below with reference to accompanying drawing; As shown in the accompanying drawing, active sampler of the present invention comprises: filter membrane disc or groove 1, connecting conduit interface 10, safety valve 5, polyurethane adsorption stopper groove 2. Liquid turbine flowmeter 3, water pump 4; the active sampler filter disc or groove, polyurethane adsorption plug groove, liquid turbine flowmeter, and water pump are sequentially connected by rubber tubes;

[0036] There is a tray in the membrane disc or groove, the tray is a circular screen type, the upper and lower parts of the membrane disc or notch are fixed equidistantly by 8 nuts, wherein the filter disc or groove is filled with glass fiber filter The membrane, with a pore size of 0.45-0.7 μm, uses a glass fiber filter membrane to pre-filter the current water body, thereby realizing the separation of water-soluble substances and the simultaneous extraction of partic...

Embodiment 2

[0040] The operating method of the active sampler for persistent organic pollutants in water based on suction filtration and pre-concentration is characterized in that the steps are as follows:

[0041] (1) Before sampling, clean all equipment components with acetone, loosen the upper nut of the filter tank, remove the upper part of the tank body, carefully place the glass fiber filter membrane in the filter tank, and then place the upper part of the filter tank Put it back and tighten the nut;

[0042] (2) Put two polyurethane adsorption plugs into the polyurethane tank, tighten the covers at both ends of the slot, and wear nitrile gloves throughout the operation;

[0043] (3) Connect the filter membrane tank, polyurethane tank, and suction filter pump flow meter components in series with a silicone catheter, and then place the hose inlet at the appropriate depth of the target water body to collect water samples; the suction filter pump voltage: 24V, output power: 50W.

Embodiment 3

[0045] Practical Comparison

[0046]Due to the characteristics of soluble organic pollutants (low concentration), it is usually necessary to collect a large amount of water to be tested, which brings some inconvenience to the collection and transfer of samples. Different degrees of biochemical changes occur, the present invention greatly reduces the collection of water samples, and the organic pollutants to be tested are adsorbed on the polyurethane material with smaller volume and lighter material, which reduces the pressure of sample collection and transfer, At the same time, the particulate matter in the water body to be tested can also be extracted synchronously; in addition, the inventive device can realize the in-situ adsorption of soluble organic pollutants in the water body to be tested, avoiding the loss of data caused by biochemical changes during the sample transfer process. interference. The active sampler equipment involved in the present invention is easy to ope...

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Abstract

The invention discloses an active sampler for water persistent organic pollutants based on suction filtration and preconcentration.The active sampler comprises a filter membrane disc or slot, a connecting conduit port, a safety valve, a polyurethane adsorption plug groove, a liquid turbine flowmeter and a water pump.The filter membrane disc or slot, the polyurethane adsorption plug groove, the liquid turbine flowmeter and the water pump are sequentially connected through a rubber hose.Water is subjected to suction filtration in advance by means of a glass fiber filter membrane, and then separation of water-soluble matter and synchronous extraction of particular matter in water are achieved; then soluble persistent organic pollutants in water are adsorbed through a polyurethane plug, so that preconcentration of organic pollutants in target water is achieved; suction filtration water volume can be calibrated in real time through the liquid turbine flowmeter so as to facilitate follow-up concentration computing.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and relates to a detection and sampling device, specifically an active sampler for persistent organic pollutants in water based on suction filtration and pre-concentration, which can be applied to soluble persistent organic pollutants and particulate matter in water synchronous extraction. Background technique [0002] Persistent Organic Pollutants (POPs) refer to organic chemicals that persist in the environment, have a long half-life, and can accumulate through the food web and cause adverse effects on human health and the environment. It migrates and exists in the environment for a long time, has long-term persistence, bioaccumulation, semi-volatility and high toxicity, and poses a serious hazard to human health and the natural environment. For organic pollution in water bodies, traditional sample collection and analysis methods mainly include raw water collection, laboratory...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/14G01N1/34G01N1/40
CPCG01N1/14G01N1/34G01N1/405
Inventor 周滨林岩刘红磊邵晓龙吕昌伟
Owner TIANJIN ACADEMY OF ENVIRONMENTAL SCI
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