Method and device for quickly detecting heavy metal contents and spacial distribution in soil

A technology for soil moisture content and heavy metals, applied in measuring devices, geophysical measurements, soil material testing, etc., can solve the problems of on-site detection data accuracy discount, detection data interference, etc.

Active Publication Date: 2009-08-26
INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such as soil moisture content, soil texture and other factors, there is a certain interference on the test data
If this problem is not solved, the accuracy of on-site inspection data will be greatly reduced

Method used

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  • Method and device for quickly detecting heavy metal contents and spacial distribution in soil
  • Method and device for quickly detecting heavy metal contents and spacial distribution in soil
  • Method and device for quickly detecting heavy metal contents and spacial distribution in soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] The method and device were used to carry out rapid field investigation of soil pollution in Chenzhou City, Hunan Province.

[0070] The implementation steps are as follows:

[0071] (1) The digitized land use map and topographic map of Chenzhou City were purchased from the Chinese Academy of Sciences.

[0072] (2) At the sample point to be tested, taking a paddy field in Guiyang County as an example, the FPXRF measurement auxiliary device was fixed on the soil surface of the paddy field, so that the surface of the FPXRF measurement auxiliary device and the soil surface were kept at the same level.

[0073] 3) Using the FPXRF instrument produced by NITON Company in the United States, align the X-ray emission / reception window at the front end with the three measurement windows on the FPXRF measurement auxiliary device in sequence, and scan the soil below the measurement window to obtain the initial value of heavy metal content in the soil. Data, the data obtained by each...

Embodiment 2

[0087] Investigation of soil As pollution distribution in a farmland in Dengjiatang Township, Suxian District, Chenzhou City, Hunan Province. The area of ​​the farmland is about 14 mu. Using the device and method of the present invention for on-site measurement, and using the moisture content calibration database of the present invention for calibration, it is found that the accuracy of the calibrated data is significantly higher than that of the uncalibrated data. Figure 4 Shown is the comparison between the FPXRF measurement data in this embodiment before and after moisture calibration and the chemical measurement value (taking As element as an example). Figure 8 It is the As element content distribution diagram of this region obtained in this embodiment.

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Abstract

The invention relates to a method for quickly detecting heavy metal contents and spacial distribution in soil, which comprises the following steps that: A) a portable X-ray fluorescence spectrometer detects the heavy metal contents in soil of a point to be detected, and a global positioning system connected with the portable X-ray fluorescence spectrometer acquires geographical coordinates of thepoint and the soil water content of the point at the same time; B) the geographical coordinates of the point to be detected are input to a calibration database, and a computer automatically acquires corresponding soil type and calibration coefficient of the soil type; C) soil water content data acquired in step A are input to the calibration database, and a calibration coefficient which corresponds to the data is automatically acquired; D) the influence of the soil type and the soil water content on the heavy metal measured value acquired in step A is deducted by the oil type calibration coefficient acquired in step B and the soil water content calibration coefficient acquired in step C; and E) the calibrated heavy metal measured value acquired in step D is combined with a topography and a land utilization electronic map of an area to be detected to immediately generate a visual soil heavy metal content spacial distribution map.

Description

technical field [0001] The invention belongs to the field of heavy metal analysis and measurement, and in particular relates to a method and device for rapidly detecting heavy metal content and spatial distribution in soil, which can also be applied to the detection of heavy metal content in plants and water. technical background [0002] Soil is one of the elements of physical geography, and it is the place where plants grow and humans live. Under the influence of industrial, mining, agricultural activities and urbanization process, soil heavy metals continue to accumulate, the degree of pollution is aggravated, and the harm is becoming more and more serious. Heavy metals stay in the soil for a long time, cannot be degraded, and can eventually affect human health through media such as water, plants, and the atmosphere. [0003] At present, my country has entered a period of high incidence of environmental pollution accidents, and heavy metal pollution accidents occur from ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/24G01N21/64G01V8/00
Inventor 陈同斌武斌雷梅
Owner INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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