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Soil heavy metal visible and near infrared reflection spectrum feature diagnosing method

A technology of reflectance spectroscopy and diagnostic methods, applied in the field of research on soil heavy metals using visible and near-infrared reflectance spectroscopy

Inactive Publication Date: 2017-09-15
WUHAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although visible-near-infrared reflectance spectroscopy has been gradually applied to the study of soil heavy metal content, its quantitative inversion mechanism and modeling methods are still in the exploratory stage

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  • Soil heavy metal visible and near infrared reflection spectrum feature diagnosing method
  • Soil heavy metal visible and near infrared reflection spectrum feature diagnosing method
  • Soil heavy metal visible and near infrared reflection spectrum feature diagnosing method

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Embodiment Construction

[0030] In order to facilitate those of ordinary skill in the art to understand and implement the present invention, the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the implementation examples described here are only used to illustrate and explain the present invention, and are not intended to limit this invention.

[0031] A method for diagnosing characteristics of visible and near-infrared reflection spectra of soil heavy metals provided by the invention comprises the following steps:

[0032] Step 1: Measure heavy metal compound CrCl 3 , CuCl 2 , ZnCl 2 The visible-near-infrared reflectance spectrum, such as figure 1 shown;

[0033] For heavy metal compounds, since the spectral characteristics of metal elements are related to the type of coordination ions, according to the needs of the experiment, in order to avoid the interference of coordination ions on the spect...

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Abstract

The invention discloses a soil heavy metal visible and near infrared reflection spectrum feature diagnosing method, comprising first selecting to measure a visible-near infrared reflection spectrum of a heavy metal compound; associating the heavy metal reflection spectrum with an external electron configuration of a heavy metal element; observing a reflection spectrum feature of the heavy metal compound; using a crystal field theory for analyzing wave band positions and reasons occurring at the feature reflection peak of the heavy metal; adding heavy metal compounds at different concentration gradients in a soil sample, and studying influences of the heavy metals with different types and different concentrations on the soil reflection spectrum; performing different spectra pretreatments on the sample reflection spectrum; researching linear correlation between the heavy metal concentration and soil reflection spectrum and position and potential theory for the occurrence of the obviously associated (p is smaller than 0.05) wave band. The studying method provides theoretical basis and experimental reference for qualitative and quantitive reflection spectrum analysis of soil heavy metal.

Description

technical field [0001] The invention relates to a research method for soil heavy metals, in particular to a method for researching soil heavy metals by using visible and near-infrared reflection spectrum technology. Background technique [0002] Soil is one of the important natural resources for the survival and development of human beings, and it is also an important part of the human ecological environment. With the rapid development of modern industry and agriculture, a large number of pollutants enter the soil environment, among which heavy metals are one of the important pollutants, and heavy metals in the soil are easy to accumulate, and when accumulated to a certain extent, they will pose a threat to human health through food chains and other channels. [0003] Traditional soil heavy metal detection mostly uses chemical analysis method. Although this method has high precision and low detection limit, it has long analysis cycle, high cost, and time-consuming and labori...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/3563G01N21/359
CPCG01N21/3563G01N21/359
Inventor 陈奕云程航万远万其进申锐莉石铁柱
Owner WUHAN UNIV
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