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本文对渤海及其邻近海域表层沉积物中有机碳(TOC)、正构烷烃(n-Alks)、石油烃(TPH)的含量、分布特征及其指示意义进行了初步的研究。结果表明,TOC含量介于0.12%~1.13%,平均值为0.44%,n-Alks含量介于0.9×10~(-6)~5.1×10~(-6),平均值为2.25×10~(-6)。C/N、δ13C结合正构烷烃的分析表明,有机质为海、陆混合来源。TPH含量介于15.2×10~(-6)~65.3×10~(-6),平均值为30.1×10~(-6),渤海湾含量最高,受人类活动影响显著。n-Alks比值分析结果表明,正构烷烃的陆源贡献大于海洋源,沉积物普遍受到了石油污染。
In this paper, the contents, distribution characteristics of organic carbon (TOC), n-Alks and petroleum hydrocarbons (TPH) in the surface sediments of the Bohai Sea and its adjacent areas were studied. The results showed that the TOC content ranged from 0.12% to 1.13% with an average of 0.44% and the content of n-Alks ranged from 0.9 × 10 -6 to 5.1 × 10 -6 with an average of 2.25 × 10 ~ (-6). Analysis of C / N and δ13C with n-alkanes showed that organic matter was a mixture of sea and land. TPH content ranged from 15.2 × 10 -6 to 65.3 × 10 -6 with an average of 30.1 × 10 -6, with the highest content in the Bohai Bay and significant impact on human activities. The result of n-Alks ratio analysis shows that the ternary alkanes contribute more land resources than the marine sources, and the sediments are generally polluted by petroleum.