Soil heavy metal Cd content inversion method and system, medium and computer equipment

Abstract

The invention belongs to the technical field of soil heavy metal pollution detection, and discloses an inversion method and system for the content of heavy metal Cd in soil, a medium and computer equipment. An X-ray fluorescence analyzer is used for detecting, and an ASD FieldSpec 3 spectrograph, matched test equipment and a software system are used for obtaining the actual content value and element spectrum information of the heavy metal Cd in the soil respectively; dimensionality reduction processing and characteristic spectrum screening are carried out on the original spectrum, and random forest, artificial neural network and support vector machine model learning and content inversion are carried out by utilizing the characteristic spectrum of the element. The soil heavy metal Cd content inversion system comprises a soil spectrum information module; a heavy metal content prediction module; and a model prediction evaluation module. The method is high in inversion precision and simple and convenient to operate, and a new technical means is provided for rapid nondestructive detection and regional evaluation of the heavy metal Cd element in the soil.

Description

technical field [0001] The invention belongs to the technical field of soil heavy metal pollution detection, and in particular relates to a soil heavy metal Cd content inversion method, system, medium and computer equipment. Background technique [0002] At present, soil is an important resource for human survival and development. With the rapid development of industrial production and the increase of mining area development, toxic and harmful substances in waste materials have infiltrated into the soil, and the pollution is becoming more and more serious. Among them, the problem of heavy metal pollution is the most prominent. Heavy metal pollution in soil is concealed, hysteretic and refractory, which destroys the organic balance of the ecological environment and enriches through the food chain, seriously threatening human health. [0003] How to quickly, accurately and non-destructively obtain soil heavy metal pollution information is the premise of soil pollution preventi...

AI Technical Summary

Problems solved by technology

However, there are still areas to be explored and improved in terms of spectral data acquisition, spectral data processing, inversion models and inversion methods. Problems such as sample contamination, human errors, data fluctuations, and unstable quality are prone to occur during the spectral acquisition process. Thus directly affecting the inversion accuracy and quantitative analysis

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