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Method for measuring clay dispersion average binding free energy and adsorption free energy to cation

A metal cation and soil technology, which is applied in the field of measuring the average binding free energy and average adsorption free energy of soil clay particles to cations, and can solve the problems that the experimental determination of the energy relationship between soil and ions has not really solved.

Inactive Publication Date: 2007-09-26
INST OF SOIL SCI CHINESE ACAD OF SCI
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Problems solved by technology

[0004] Half a century later, the experimental determination of the energy relationship between soil and ions remains unresolved

Method used

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  • Method for measuring clay dispersion average binding free energy and adsorption free energy to cation
  • Method for measuring clay dispersion average binding free energy and adsorption free energy to cation
  • Method for measuring clay dispersion average binding free energy and adsorption free energy to cation

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Embodiment Construction

[0046] The present invention will be further described below in conjunction with the accompanying drawings and examples.

[0047] Preparation of soil samples and suspensions

[0048] The soil clay particles with a particle size of less than 2 μm were extracted by the sedimentation method, and then the soil clay particles were prepared by conventional methods into samples saturated with different cations, which were dried and ground for the preparation of suspensions. Weigh a certain amount of the above soil samples and prepare them with deionized water to a concentration range of 1 to 50 gL -1 (if the concentration is 10gL -1 ) suspension, after ultrasonic dispersion, constant temperature vibration 1 to 2 times a day, equilibrated for 7 to 10 days for Wien effect measurement.

[0049] Measuring device

[0050] The device used to measure the Wien effect in soil suspension consists of a pulsed variable high voltage DC power supply and a conductivity cell, the output DC voltag...

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Abstract

This invention relates to one method to test earth anode ion even combination free energy and absorptive free energy, which comprises the following steps: a, processing the anode saturation earth adhesive particles with radium less than 2 mu m and then using ion remove water or stilled water to match earth hanging liquid; b, putting the earth hanging liquid into field less than 15kV.cm<-1> to gradually form field intensity to test each conductivity rate to get the relation ship curve between earth hanging liquid and field intensity; c, according to math formula to compute particles anode ion even combination free energy and absorptive free energy, wherein, Delta G=RTln(2CEC.Cp.lambada / EC0) (4); Delta G=RTln(EC / EC0) with R for gas constant; T for thermal temperature and CEC for anode ion exchange volume and Cp for particle concentration.

Description

technical field [0001] The invention belongs to a new technology in the technical fields of phytonutrient chemistry and environmental protection, and relates to a new method for measuring the average binding free energy and average adsorption free energy of soil clay particles to cations. Wien effect. Background technique [0002] By measuring the average binding free energy and average adsorption free energy of soil clay to cations, it can be inferred that the soil's storage capacity for nutrient ions and the availability of nutrients, the activity of polluting ions in soil and the difficulty of detoxification measures. Therefore, it has always been a problem that soil scientists, especially those working in the fields of fertility regulation, soil remediation and environmental protection, want to solve. [0003] Marshall (1950) proposed the concept of the average binding free energy of cations to express the binding energy between soil particles and cations, and gave a fo...

Claims

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Application Information

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IPC IPC(8): G01N27/06G01N1/28
Inventor 王玉军李成保周东美王卫姜军
Owner INST OF SOIL SCI CHINESE ACAD OF SCI
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