Device and method for simulation experiment for assessment of migration and fate of nano particles in underground environment

A simulated experimental device and nanoparticle technology, which is applied in the field of simulated experimental devices for evaluating the migration and fate of nanoparticles in the underground environment. It can solve the problems of wasting groundwater resources, large energy consumption, and unsustainability, and prevent material precipitation. , flexible device design, and the effect of reducing simulation costs

Inactive Publication Date: 2018-08-24
INST OF SOIL SCI CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process requires high cost, high energy consumption, waste of groundwater resources, and is unsustainable. It has been increasingly abandoned by scholars at home and abroad and engineers from developed countries in Europe and the United States.

Method used

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  • Device and method for simulation experiment for assessment of migration and fate of nano particles in underground environment
  • Device and method for simulation experiment for assessment of migration and fate of nano particles in underground environment
  • Device and method for simulation experiment for assessment of migration and fate of nano particles in underground environment

Examples

Experimental program
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Effect test

Embodiment 1

[0031] like Figure 1~2 As shown, a simulated experimental device for evaluating the migration and fate of nanoparticles in the underground environment of the present invention mainly includes a water supply device, a reactor 5, an injection device, a sampling device and a water storage device, wherein the water supply device includes a pipeline sequence Connected liquid storage bottle 1, flow meter 2 and peristaltic pump a 3, water supply device is connected with water inlet pool 6 through pipeline again, and said pipeline is provided with sampling valve a 4; Peristaltic pump is used for adjusting reactor inlet water flow, can A multi-pump peristaltic pump system is selected, which can supply injection devices and several parallel simulation experimental devices at the same time, with a flow rate range of 0.21 to 21 mL / min (the Masterflex L / S peristaltic pump system from Cole-Parmer Instrument Company of the United States is used in this example) . The flow meter is used to ...

Embodiment 2

[0039] A kind of simulated experimental method utilizing the simulated experimental device described in embodiment 1, the migration and fate of nano magnesium oxide in underground environment and its in-situ injection repairing cadmium polluted groundwater are as follows:

[0040] Two injection wells were set up in the simulated aquifer area with a well spacing of 20 cm. A total of 30 monitoring wells are set in 8 rows, of which 2 monitoring wells are upstream of the injection wells, 1 row is flush with the injection wells, and the remaining 5 rows are downstream of the injection wells. The specific distribution and numbers are as follows: figure 2 shown.

[0041] During the experiment, the upper cover of the reactor was opened, and the fine sand was used as the aquifer, and filled into the simulated aquifer area in the reactor by wet filling. ~2cm clean fine sand, compact the filled part with a wooden pestle, then inject water and fill fine sand, repeat several times until ...

Embodiment 3

[0045] Another kind of simulated experimental method utilizing the simulated experimental device described in Example 1 to carry out the migration and fate of modified nano-magnesia in the underground environment and its in-situ injection to repair cadmium-contaminated groundwater is the same as that of Example 2. The injected nanoparticles are different, so the migration properties of modified and unmodified nano-magnesia and their similarities and differences in the remediation effect of cadmium-contaminated groundwater can be compared. Figure 5 It shows that the concentration of magnesium ions produced by modified nano-magnesia is much higher than that of unmodified nano-magnesia, and the repair effect of modified nano-magnesia on cadmium is also better than that of unmodified nano-magnesia. In addition, sections were excavated at intervals of 2.5 cm in the simulated aquifer after restoration to observe the migration of nanoparticles ( Figure 6 ), it can be seen that the ...

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Abstract

The present invention provides a device and a method for simulation experiment for assessment of migration and fate of nano particles in an underground environment. The device comprises a water supplydevice, a reactor, an injection device, a sampling device and a water storage device. The reactor is a cell body with an upper cover, and the space of the internal portion of the cell body is dividedinto a water inlet pool, a simulation water-bearing layer and a water outlet pool through two vertical separated nets; the water supply device is connected with the water inlet pool, the water storage device is connected with the water outlet pool, an upstream of the area of the simulation water-bearing layer in the cell body is provided with an injection well, the cell body is internally provided with a monitoring well, an injection hole is arranged at the position, corresponding to the injection well, on the upper cover, a sampling hole is arranged at a position corresponding to a monitoring well, the injection device is connected with the injection hole, and the sampling device is connected with the sampling hole. The device is flexible in design, simple to operate, high in practicability and low in cost.

Description

technical field [0001] The invention belongs to the technical field of soil and groundwater restoration and treatment, and in particular relates to a simulation experiment device and method for evaluating the migration and fate of nanoparticles in an underground environment. Background technique [0002] Groundwater is one of the important water sources for human production and life. However, due to the impact of industrial and agricultural production and waste discharge, the problem of groundwater pollution in my country has become increasingly prominent. The monthly report on groundwater dynamics released by the Ministry of Water Resources in January 2016 indicated that the water quality assessment results were generally poor, with more than 80% of the groundwater polluted, and some areas were polluted by heavy metals and toxic organic substances to a certain extent. If the polluted groundwater is not treated in time, many problems such as drinking water and food safety h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09B25/00
CPCG09B25/00
Inventor 宋昕妮·卡玛·科祖·杜瓦尔林娜
Owner INST OF SOIL SCI CHINESE ACAD OF SCI
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