土壤重金属含量光谱估算模型的初步研究

【Objective】The retrieval model of the heavy metal content using quantitative spectrometric analysis provides a new approach to the evaluation of heavy metal contamination of soil.【Method】This paper takes paddy soil in Kunshan as study object. Based on the absorption low of heavy metal, through regression analysis this paper uses the Organic matter Identification Index (OII) to makes a model of estimating the content of heavy metal in soil.【Result】According to the result of the correlation analysis, the Cu and Pb are the most sensitive elements to the organic matter content, next are As, Zn, Cd, Ni, Cr and Hg. However, the accuracy of retrieval model is unsatisfactory.【Conclusion】To a certain extent, using spectrum characteristic of soil organic matter to estimate the content of heavy metals is feasible. But the practicability of this method still needs further validated.