Mercury bio-availability determination device and determination method

A bioavailability and measuring device technology, applied in the field of mercury bioavailability measuring devices, can solve the problems of high price and limited application, and achieve the effects of low cost, easy availability of raw materials, and simple production method and process.

Pending Publication Date: 2022-06-21
HENAN AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the most widely used adsorption membranes of DGT devices for the determination of mercury bioavailability are Chelex-100 gel and Spheron-Thiol gel containing sulfhydryl groups. However, the DGT devices used are all purchased from abroad and are relatively expensive, which greatly limits their application.

Method used

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  • Mercury bio-availability determination device and determination method
  • Mercury bio-availability determination device and determination method
  • Mercury bio-availability determination device and determination method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1: A mercury bioavailability measurement device, namely a DGT device, includes a filter membrane 1, a diffusion membrane 2, an adsorption membrane 3, and a plastic casing 4 for fixing the filter membrane 1, the diffusion membrane 2, and the adsorption membrane 3, wherein the filter Membrane 1 is a glass fiber filter membrane, diffusion membrane 2 is a membrane made of agarose gel with a mass percentage of 1.5%, and adsorption membrane 3 is a membrane made of mercaptodextran adsorption gel.

[0035] like figure 1 As shown in the figure, DGT device assembly: put the adsorption membrane 3, the diffusion membrane 2 and the filter membrane 1 into the bottom box of the plastic shell 4 in turn, make sure that each part fits tightly without leaving an air layer, and finally fasten the upper cover , so that the filter membrane 1 and the plastic shell 4 are tightly combined to ensure that the outside world can only exchange substances with the adsorption membrane 3 throug...

Embodiment 2

[0067] Embodiment 2: Mercury bioavailability determination method: The concrete steps are:

[0068] (a) filter the sewage and let it stand for 24h;

[0069] (b) Take 20mL sewage sample and place it in a colorimetric tube, add 1mL concentrated H with a pipette 2 SO 4 , shake well and then dropwise add 5% K by mass 2 MnO 4 solution, until the sample solution turns purple and does not fade for 15 minutes, seal the mouth of the colorimetric tube with plastic wrap, heat it in a water bath at 95 °C for 2 hours, and take it out. 3 Cl solution until the purple color of the solution fades, dilute to the mark with deionized water, shake well for testing;

[0070] (c) putting the mercury bioavailability measuring device of claim 1 into the sewage sample;

[0071] (d) Take out the measuring device from the sewage sample, clean the plastic casing and window of the measuring device with deionized water, open the plastic casing and take out the adsorption film, divide it into pieces and...

Embodiment 3

[0073] Example 3: Using the mercury bioavailability assay method described in Example 2: Take Zhengzhou Wulongkou Sewage Treatment Plant as an example, Zhengzhou Wulongkou Sewage Treatment Plant was built on June 7, 2003, and the project is located in Zhengzhou City It is mainly responsible for domestic sewage and industrial wastewater in the west of Songshan Road, north of Longhai Road, south of Wulongkou, and east of Xihuan Road in the urban area, with a service area of ​​about 27km. 2 , serving population 3.7×10 5 people, total investment 2.9×10 8 Yuan. The construction scale is 1 × 10 sewage treatment per day 5 t, daily treatment and reuse water 5×10 4 t.

[0074] The design period and scale of Wulongkou Sewage Treatment Plant: the first phase of operation in 2005, and the second phase of operation in 2009. The design scale of the first phase is 1×10 5 t / d, in which the reuse water consumption is 5×10 4 t / d, the service scope is most of the domestic sewage in the wa...

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Abstract

The invention discloses a mercury bioavailability measuring device and method, and relates to the technical field of metal pollution detection, the mercury bioavailability measuring device comprises a filter membrane, a diffusion membrane, an adsorption membrane and a plastic shell for fixing the filter membrane, the diffusion membrane and the adsorption membrane, the filter membrane is a glass fiber filter membrane, the diffusion membrane is a membrane made of agarose gel with the mass percent of 1.5%, and the adsorption membrane is a membrane made of silica gel. According to the invention, the novel gel assembled DGT device is self-researched, the manufacturing method of the DGT device is simple in process, the raw materials are easy to obtain, the cost is low, and a basis is provided for DGT production localization; meanwhile, by researching the application conditions and effects of the DGT device, a scientific basis is expected to be provided for mercury pollution risk evaluation and pollution abatement.

Description

technical field [0001] The invention relates to the technical field of metal pollution detection, in particular to a mercury bioavailability measuring device and a measuring method. Background technique [0002] Risk assessment of metal contamination in the environment must determine the bioavailable state of the metal. Gradient diffusion thin film technology (DGT) technology has the advantages of different from other chemical analysis methods in measuring the bioavailability of metals, and the bioavailable concentration of metals can be obtained. At present, the most widely used adsorption membranes for the determination of mercury bioavailability in DGT devices are Chelex-100 gel and Spheron-Thiol gel containing thiol groups, but the DGT devices used are all purchased from abroad and are expensive, which greatly limits their application. Therefore, it is urgent to develop a new DGT device that can adsorb mercury. SUMMARY OF THE INVENTION [0003] In view of the above s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N13/00G01N21/64C08J5/18C08L5/12C08L5/02
CPCG01N13/00G01N21/6404C08J5/18G01N2013/003C08J2305/12C08J2305/02
Inventor 刘文霞乔辛悦李博张发文赵勇李利梅
Owner HENAN AGRICULTURAL UNIVERSITY
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