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Simultaneous quantification of multiple chemical properties of soil solution using smart spectroscopy

  • Soils, Sec 3 • Remediation and Management of Contaminated or Degraded Lands • Research Article
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Abstract

Purpose

Soil environmental monitoring is crucial for crop production, urban planning, and human health. However, the existing monitoring methods are inefficient and costly. In order to improve the efficiency of soil monitoring, a multi-indicator concentration detection method based on a new modified spectrometer technology (MST) was proposed.

Materials and methods

MST, a method that combines high-throughput experiments (HTE) and machine learning (ML), was proposed to determine various substances in a complex environment and exhibited features of large measurement throughput and high prediction accuracy. Soil is a classic complex chemical system in nature, so we want to try to apply MST to soil monitoring projects. In this study, about 14,400 holographic scattering spectroscopy (HSS) images were captured using the MST and used to train 3 deep neural networks (ResNet-50, Inception V1, and SqueezeNet V1.1). These models were optimized by adjusting parameters and hyperparameters.

Results and discussion

The concentration prediction model based on ResNet-50 has fast convergence speed and a good learning effect. The model can simultaneously detect eight indicators. The best evaluation results achieved coefficient of determination (R2) = 0.996, root mean square error (RMSE) = 0.758, and mean relative error (MRE) < 5% in the test set.

Conclusions

The results show that MST is superior to the previous studies published by EPA, and demonstrate some potential in introducing ML to soil environmental monitoring.

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Funding

This work is supported by the National Natural Science Foundation of China (No. 50309011), the Scientific Reuter Foundation for the Returned Overseas Chinese Scholars (No. 08501041585), the Natural Science Basic Research Plan in the Shaanxi Province of China (No. 2021JQ436), and the Scientific Research Program Funded by Shaanxi Provincial Education Department (No. 22JK0583).

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Correspondence to Jianchao Lee.

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The authors declare no competing interests.

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Responsible editor: Yan He

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Zhao, Y., Feng, Y., Liu, L. et al. Simultaneous quantification of multiple chemical properties of soil solution using smart spectroscopy. J Soils Sediments 24, 1694–1703 (2024). https://doi.org/10.1007/s11368-024-03747-4

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  • DOI: https://doi.org/10.1007/s11368-024-03747-4

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