正构烷烃在海湾沉积物与悬浮颗粒物中的粒径分布及其环境行为
Size-distribution of n-alkanes in estuarine sediment and suspended particulate matter:Implications for environmental behavior of organic pollutants
查看参考文献38篇
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文摘
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为初步探讨粒径大小对污染物迁移循环机制的影响,分析了广东省海陵湾水体中的悬浮颗粒与表层沉积物中不同粒径颗粒的质量分布特征和正构烷烃的空间分布。结果表明,此区域水体中的悬浮物的絮凝临界粒径约在细颗粒(Φ<30μm)范围内。悬浮颗粒与表层沉积物中的正构烷烃的富集能力受多种因素作用,其中不同粒径组分的有机质的组成与类型及污染物的来源是重要的影响因素。水体底层细粒径中nC_(31)的浓度增加说明水流作用与颗粒物粒径大小是影响海底沉积物再悬浮的重要参数。 |
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其他语种文摘
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Occurrence of n-alkanes in sediments and suspended particulate matter (SPM) was examined to gain a better understanding of the distribution and transport of this class of contaminants in relation to particle grain size distribution. The samples were studied in five grain size fractions for sediment (fromΦ<450μm toΦ<30μm) and three grain size fractions for SPM (from Φ> 63 μm to Φ< 30 μm). The study illustrates that the maximal flocculation diameter of fine suspended particulate matter in study areas was 30μm. And the type and structure of organic matter and the source of pollutants play an important role in n-alkane distribution in different grain size particles in SPM and sediments fractions. The contents of nC_(31) in fine-size fraction of SPM were higher than those in sediment on the sampling site, which indicated that water current and grain size of particulate matter are the chief contributor of bed-sediment re-suspension. |
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来源
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地球化学
,2014,43(3):267-275 【核心库】
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关键词
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正构烷烃
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沉积物
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悬浮物
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粒径
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再悬浮
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地址
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中国科学院广州地球化学研究所, 有机地球化学国家重点实验室, 广东, 广州, 510640
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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0379-1726 |
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学科
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地质学 |
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基金
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广东省自然科学基金
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国家自然科学基金
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文献收藏号
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CSCD:5150945
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