东头山岛红树林柱状沉积物有机质示差红外光谱分析

Spectral Subtraction of Infrared Spectroscopic Analysis of Organic Matter in the Columnar Sediment of Mangrove Wetland in Dongtoushan Island

摘要: 本文基于傅里叶红外光谱测试，利用差谱法对湛江东头山岛红树林湿地柱状沉积物进行有机质组分及含量研究。结果表明，在排除土壤矿物干扰后，对样品进行差谱分析发现，红树林湿地有机质组成中芳香族碳、脂肪族碳化合物较多，且有机质主要来源表层；有机质特征吸收峰面积与土壤有机质含量的相关性分析显示，1630 cm−1、1420 cm−1处有机质吸收峰面积和有机质吸收峰总面积与有机质含量呈现负相关，通过特定吸收峰面积能判断有机质含量变化趋势。差谱法结合有机质吸收峰面积积分计算的方法能为红树林有机质组分和含量研究提供技术支持。

Abstract: In this paper, based on Fourier infrared spectroscopy test, spectral subtraction is used to study the organic composition and content of organic matter in the columnar sediments of the mangrove wetland in Dongtoushan Island, Zhanjiang. The results show that after eliminating the interference of soil minerals, analyzed by spectral subtraction, samples found that the organic matter composition of mangrove wetland contains more aromatic carbon and aliphatic carbon compounds, mainly from the surface layer. The correlation analysis of the characteristic absorption peak area of organic matter and the content of soil organic matter shows that the organic matter absorption peak area and total organic matter absorption peak area at 1630 cm−1 and 1420 cm−1 are negatively correlated with the organic matter content, which can predict the changing trend of organic matter content. The spectral subtraction method combined with the calculation of organic matter absorption peak area integral can provide technical support for the study of mangrove organic matter composition and content.