Characters and risk assessment of hydrocarbons in surface sediments of Sanniang Bay in Guangxi Province
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摘要: 为研究广西三娘湾海域表层沉积物有机质中烃类化合物的分布特征及来源,于2019年10月在三娘湾海域采集了表层沉积物样品,利用加速溶剂萃取GC-MSD法对沉积物中的16种多环芳烃(PAHs)进行了分析。结果表明: 三娘湾海域表层沉积物样品中多环芳烃的含量为37~241.8 ng/g,总体处于含量较低的水平,但与往年相比研究区PAHs含量增加明显。通过组分分析等方法进行PAHs的来源分析,结果指示其主要来源为燃烧源,夹杂石油源的混合来源; 通过效应区间法对多环芳烃进行生态风险评价,认为其总体处于风险较低的水平。综合研究表明,三娘湾海域总体生态环境较好,但人类活动对多环芳烃含量及分布特征的影响较明显,需要持续关注。Abstract: In order to study the distribution characteristics and sources of hydrocarbons in the surface sediments of Sanniang Bay in Guangxi Province, the authors have collected five surface sediments samples in October 2019 and analyzed their polycyclic aromatic hydrocarbons (PAHs) using GC-MSD method. The results showed that the PAHs content was 37~241.8 ng/g, which was generally in a low level, but it markedly increased in recent years. The component analysis on PAHs source indicated that the main source is combustion source and mixed oil source. The ecological risk assessment of PAHs was carried out by the effect interval method, and it was found that the PAHs content was in low risk level. The comprehensive study shows that the overall ecological environment of Sanniang Bay is good, but the impact of human activities on PAHs is obvious and needs to be paid continuous attention.
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Key words:
- Sanniang Bay /
- sediment /
- polycyclic aromatic hydrocarbons /
- risk assessment
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