北部湾东部沉积物中石油烃分布与累积

发布时间：2018-02-26 23:26

本文关键词： 北部湾石油烃污染沉积速率　出处：《海洋通报》2016年01期 　论文类型：期刊论文

【摘要】：为揭示北部湾东部沉积物中石油烃的污染现状,分析了24个表层样和1只柱状样的石油烃含量,并运用210Pb法对柱状样进行了定年。结果表明2007年北部湾东部表层沉积物中石油烃含量范围为62.94~107.80μg/g,平均为83.03μg/g,总体污染较轻。石油烃含量的低值主要出现在海南岛西侧海域,而高值主要分布在海南岛西北泥质沉积区和湾北近岸海域,油气平台附近的石油烃也略微富集,距源区距离是决定沉积物中石油烃含量的重要因素。柱状样B349基于210Pb法获得的平均沉积速率为0.53 cm/a,其中石油烃含量范围为68.31~94.77μg/g,石油烃含量的2次重要变化可能分别与20世纪80年代涠洲海域石油开发初期的溢油和20世纪90年代以来经济增长所伴随的排污增加相对应。
[Abstract]:In order to reveal the present situation of petroleum hydrocarbon pollution in sediments in the eastern part of Beibu Gulf, the petroleum hydrocarbon contents of 24 surface samples and 1 column sample were analyzed. The results show that in 2007, the petroleum hydrocarbon content in the surface sediments of the eastern Beibu Gulf was 62.94 渭 g / g, with an average of 83.03 渭 g / g, and the total pollution was relatively light. The low value of petroleum hydrocarbon content mainly occurred in the western sea area of Hainan Island. The high values are mainly distributed in the muddy sedimentary area of northwest Hainan Island and the coastal waters of the northern bay, and the petroleum hydrocarbons near the oil and gas platform are also slightly enriched. Distance from source area is an important factor in determining hydrocarbon content in sediment. The average deposition rate of columnar B349 based on 210Pb method is 0.53 cm / a, in which petroleum hydrocarbon content ranges from 68.31 渭 g / g to 94.77 渭 g / g, and two important variations of petroleum hydrocarbon content may occur respectively. It corresponds to the oil spill in the initial stage of oil development in Weizhou area in 1980s and the increase in sewage discharge associated with economic growth since 1990s.
【作者单位】：国家海洋局第二海洋研究所国家海洋局海底科学重点实验室;国家海洋局第二海洋研究所国家海洋局海洋生态系统与生物地球化学重点实验室;国家海洋局南海环境监测中心;
【基金】：海洋公益性行业科研专项(201105003)
【分类号】：X55

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