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| 黄河口新生湿地沉积物中的金属元素及其环境指示意义 |
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王启栋),宋金明),李学刚),袁华茂),李宁),曹磊)
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中国科学院海洋研究所生态与环境科学重点实验室,中国科学院海洋研究所生态与环境科学重点实验室,中国科学院海洋研究所生态与环境科学重点实验室,中国科学院海洋研究所生态与环境科学重点实验室,中国科学院海洋研究所生态与环境科学重点实验室,中国科学院海洋研究所生态与环境科学重点实验室
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| 摘要: |
| 通过对黄河口新生湿地沉积物岩芯中常量元素、稀土元素以及重金属分布特征的研究,探讨了滨海湿地沉积物中金属元素的环境指示意义。结果表明,大部分金属元素的分布模式类似,均在40 cm左右出现明显的低值区,这主要是由黄河携带而来的大量陆源物质的输入造成的。沉积物粒度组成以及有机质含量对金属元素的分布影响显著。常量元素中,Na2O与其他元素变化趋势相反,反应了潮汐对滨海湿地的侵蚀作用；黄河口新生湿地沉积物单个稀土元素的含量大小顺序与黄河沉积物和渤海沉积物基本一致,稀土元素总量则高于黄河沉积物而低于渤海沉积物,表明黄河口湿地沉积物具有河流泥沙和海水颗粒物双重来源,而轻重分异比的变化则反映了物质输入的改变；而在较高的有机质和粘土含量的影响下,黄河口新生湿地沉积物中重金属发生了明显的富集。 |
| 关键词: 常量元素,稀土元素,重金属,沉积物,黄河口新生湿地 |
| DOI：10.12036/hykxjk20160721002 |
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| Metal elements in the Sediment of the Newly Created Wetlands of Yellow River Estuary and Their Environmental Significances |
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WANG Qidong),SONG Jinming),LI Xuegang),YUAN Huamao),LI Ning) and CAO Lei)
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Key Laboratory of Ecology and Environment,Institute of Oceanography,Chinese Academy of Sciences,Key Laboratory of Ecology and Environment,Institute of Oceanography,Chinese Academy of Sciences,Key Laboratory of Ecology and Environment,Institute of Oceanography,Chinese Academy of Sciences,Key Laboratory of Ecology and Environment,Institute of Oceanography,Chinese Academy of Sciences,Key Laboratory of Ecology and Environment,Institute of Oceanography,Chinese Academy of Sciences,Key Laboratory of Ecology and Environment,Institute of Oceanography,Chinese Academy of Sciences
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| Abstract: |
| Distributions of major elements, rare earth elements (REE) and heavy metals in the sediment core of the newly created wetlands of Yellow River Estuary were investigated and environmental significances of metal elements were discussed. The results showed that most metal elements had similar distribution patterns, which presented a low value zone at about 40 cm due to the numerous input of sediment from Yellow River. Grain size composition and organic matter content had significant influence on the distribution of metal elements. Specially, the distribution of Na2O was opposite to most other elements, reflecting the tidal erosion of the wetland. The concentration order of single REE in the sediment of Yellow River Estuary wetlands was consistent with the Yellow River sediment and Bohai sea sediment, but the total REE content was higher than the Yellow River sediment and lower than the Bohai sediment, indicating that the sediment in the Yellow River Estuary wetlands came from both Yellow River and Bohai Sea. The variation of (La/Yb)NASCcould reflect the change of material input. Besides, the heavy metals in the sediment of Yellow River Estuary wetlands enriched significantly under the influence of high contents of organic matter and clay particles. |
| Key words: major elements rare earth elements heavy metals sediment newly created wetlands of the Yellow River Estuary |
