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Analogy method for heavy nonaqueous-phase organic pollutant transport in semitransparent particulate material

A technology of organic pollutants and granular materials, applied in the direction of analytical materials, instruments, etc., can solve the problems of long-term migration process research without DNAPL

Active Publication Date: 2017-05-10
NANJING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The latest research on the relative permeability of DNAPL shows that the behavior of DNAPL in the long-term migration process is very complicated, so most studies take a small part of the DNAPL migration process for research, but do not study the long-term migration process of the entire DNAPL

Method used

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  • Analogy method for heavy nonaqueous-phase organic pollutant transport in semitransparent particulate material
  • Analogy method for heavy nonaqueous-phase organic pollutant transport in semitransparent particulate material
  • Analogy method for heavy nonaqueous-phase organic pollutant transport in semitransparent particulate material

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Experimental program
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Effect test

Embodiment

[0061] Embodiment: a method for simulating the migration of heavy non-aqueous organic pollutants in translucent granular materials, the specific operations are as follows:

[0062] Prepare a two-dimensional sand box, fill it with translucent quartz sand of different particle sizes as the translucent granular material, use a visible light source to illuminate the two-dimensional sand box from one side, so that visible light can penetrate the material, and use a CCD camera on the other side to receive transmitted light signals , and then inject DNAPL into the sand box, so that the DNAPL migrates in the sand box for a long time, and the transmitted light signal is monitored by a CCD camera during the whole process.

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Abstract

The invention provides an analogy method for heavy nonaqueous-phase organic pollutant transport in a semitransparent particulate material. The analogy method comprises the following steps: determining the porosity, the permeability and the tubular billet inlet pressure of the semitransparent particulate material through the visible light microcosmic imaging technology and the microcosmic fractal model quantifying of the material particle, and using a new relative permeability-saturability model based on a BC model to describe the relative permeability in the DNAPL long-term transport process, and executing the accurate analogy to the whole DNAPL complicated long-term transport process by using UTCHEM. The method has the high simulation accuracy to the DNAPL long-term transport, and is rapid, economic and efficient. The method has extensive application prospect in the transport research, such as the measurement of the semitransparent material property and the material internal fluid and in the repair project design of the aquifer DNAPL pollution.

Description

technical field [0001] The invention relates to a heavy non-aqueous phase organic matter, in particular to a method for simulating the migration of heavy non-aqueous phase organic pollutants in translucent granular materials. Background technique [0002] With economic development, human activities release more and more dense non-aqueous phase liquid (DNAPL) into the ground, causing serious pollution to soil and groundwater. Due to the stable chemical properties and low solubility of DNAPL, when DNAPL enters the aquifer, DNAPL often becomes an independent phase and stays in the pores of the aquifer. The density of DNAPL is higher than that of water, and it will migrate to the deep part of the aquifer until the bottom of the aquifer. On the upper part of the low-permeability lens of the aquifer, there is a pollution pool formed by DNAPL accumulation. Once DNAPL enters the groundwater system, the residual dispersed pollutants and accumulated pollution pools of DNAPL will beco...

Claims

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Application Information

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IPC IPC(8): G01N15/00
CPCG01N15/00
Inventor 吴剑锋吴鸣吴吉春
Owner NANJING UNIV
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