雷州半岛近海沉积物中腐殖质的分布和腐殖酸特性研究

发布时间：2018-05-18 02:13

本文选题：腐殖质 + 腐殖酸　；参考：《热带海洋学报》2016年04期

【摘要】：近海沉积物中腐殖质和腐殖酸对海洋环境污染具有一定的指示作用,其对重金属、持久性有机污染物的迁移转化具有较大的影响。文章采用焦磷酸钠-氢氧化钠提取重铬酸钾氧化容量法对沉积物腐殖质的组成进行测定,Na OH碱提取法对沉积物腐殖酸进行提取,使用元素分析、紫外光谱、傅里叶变换红外光谱(FTIR)等方法对提取的腐殖酸进行表征。研究结果表明:雷州半岛近海表层沉积物腐殖质含量较低,在0.26%~2.36%之间,平均值1.49%,其中富里酸占51%,胡敏素占35%,胡敏酸占14%,腐殖酸占整个腐殖质的比例是65%。柱状沉积物腐殖化程度高于表层沉积物。雷州半岛近海沉积物中腐殖酸以富里酸和小分子有机物为主,碳含量高,硫含量低,具有苯环、羧基、醇羟基、酚羟基、羰基及氨基等官能团,腐殖化程度不高。研究结果将为雷州半岛沿海经济的开发和环境保护提供一定的指导意义。
[Abstract]:The humus and humic acid in offshore sediments have a certain indicative effect on marine environmental pollution, and they have great influence on the migration and transformation of heavy metals and persistent organic pollutants. The composition of humus in sediment was determined by sodium pyrophosphate and sodium hydroxide extraction potassium dichromate oxidation volumetric method. The humic acid in sediment was extracted by NaOH base extraction method. Element analysis and UV spectrum were used. The extracted humic acid was characterized by Fourier transform infrared spectroscopy (FTIR) and other methods. The results show that the content of humus in surface sediments of Leizhou Peninsula is relatively low, ranging from 0.26% to 2.36%, with an average value of 1.49. among them, fulvic acid accounts for 51%, humic acid for 35%, Hu Min acid for 14%, and humic acid for 65% of the total humus. The humification degree of columnar sediments was higher than that of surface sediments. In the coastal sediments of Leizhou Peninsula, the humic acid is mainly composed of fulvic acid and small molecular organic compounds, with high carbon content and low sulfur content, with functional groups such as benzene ring, carboxyl group, alcohol hydroxyl group, phenolic hydroxyl group, carbonyl group and amino group, and the degree of humification is not high. The results will provide some guidance for the development of coastal economy and environmental protection of Leizhou Peninsula.
【作者单位】：广东海洋大学海洋资源与环境监测中心;华南理工大学环境与能源学院;
【基金】：海洋公益性行业科研专项经费(201305038-6) 广东省科技计划项目(2013B021600015)~~
【分类号】：P736.21

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