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Experimental parameter investigating method for electric restoring polluted soil and groundwater

A technology for electrodynamic repair and polluted soil, which is applied in the direction of measuring devices, electrochemical variables of materials, and material analysis through electromagnetic means, and can solve problems such as not being retrieved

Inactive Publication Date: 2006-11-29
NANJING UNIV
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Problems solved by technology

However, no literature was retrieved on the difference between the two methods
[0006] For the mensuration of soil pH, there is a kind of method that can be used for the mensuration of soil background solution in the prior art: 5g dry soil and 25mL 0.1mol / L KCl mix, measure the pH of soil suspension after 1 hour, but there is not yet a method This method can be effectively used in the measurement and control of soil pH in the experimental process

Method used

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  • Experimental parameter investigating method for electric restoring polluted soil and groundwater
  • Experimental parameter investigating method for electric restoring polluted soil and groundwater
  • Experimental parameter investigating method for electric restoring polluted soil and groundwater

Examples

Experimental program
Comparison scheme
Effect test

example 3

[0056] Example 3 is the method of controlling current at rest ( Figure 5 ); Example 4 is the controlled potential method when standing still ( Figure 6 )

example 5

[0057] Example 5 is the method of controlling current during stirring ( Figure 7 ); Example 6 is the controlled potential method during stirring ( Figure 8 )

[0058] Solution parameters: 20mmol / L NaCl, pH=6.20, conductivity=2370μS / cm

[0059] Electrode parameters: graphite electrode φ6×65mm, electrode distance: 6cm

[0060] 2.3.1 Results and discussion

[0061] The results of the static experiment are as Figure 5 with Figure 6 , The results of the stirring experiment are as Figure 7 , 8 . The electrolysis conditions (electrode area, solution composition, concentration and electrolysis voltage) of these two experiments are the same, Figure 6 with Figure 7 There is almost a one-to-one correspondence between current and voltage. Under stirring conditions, the curve at low current and low potential should be slightly flat. The slope of the curve is the same at high current and high potential. This difference is due to the fact that vigorous stirring of the solution reduces the...

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Abstract

The invention is a method for measuring and controlling parameters when electrically and dynamically repairing polluted soil and ground water, determining potential of measured working electrodes in an electric repairing system, adopting three-electrode measuring system, inserting a stable-potential reference electrode between the measured working electrodes in electro-bath in the electric repairing system to compose a measuring battery together with the measured electrodes, and indirectly determining the potential of the measured working electrodes by determining potential difference between electrolysis electrode and reference electrode. And an electric dynamic repairing device of polluted soil and ground water, divides the soil into several equal parts, and inserts Pt electrodes at equal dividing points and two ends and arranges reference electrode in the place where the cathode clings to diaphragm and the device can measure potential at each point in the soil by measuring voltage between Pt and reference electrodes.

Description

Technical field [0001] The invention relates to a parameter measurement and control method for electrically repairing contaminated soil and groundwater. Background technique [0002] China's current agricultural environmental pollution, especially soil environmental pollution, has become increasingly prominent. There are as many as 20 million hectares of arable land polluted by heavy metals throughout the country 2 , The farmland contaminated by various organic pollutants or chemicals totals more than 60 million ha 2 . Because persistent organic pollutants (POPs) have low water solubility, high fat solubility, semi-volatility, and non-degradability, they will stay in environmental media for a long time and migrate across the interface between environmental media, thus causing pollution Features of large scope and long duration. This makes the pesticide residues in the main agricultural products produced in the country exceed the standard rate as high as 16-...

Claims

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Application Information

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IPC IPC(8): G01N27/00G01N27/26G01N27/02
Inventor 毕树平黄星发陆小成徐泉郑正
Owner NANJING UNIV