碳酸钙对黄河口潮间带沉积物微团聚体的影响

陈友媛; 王俊鹏; 赵文娟; 高来见; 黄涛; 姚紫娟

doi:10.3724/SP.J.1140.2010.04087

碳酸钙对黄河口潮间带沉积物微团聚体的影响

1 海洋环境与生态教育部重点实验室, 青岛 266100;
2 中国海洋大学环境科学与工程学院, 青岛 266100

基金项目:

国家高新技术研究发展计划项目(2008AA09Z109)

国家自然科学基金项目(40606020)

详细信息

作者简介:
陈友媛(1966-),女,副教授,主要从事海洋沉积环境研究,E-mail:youyuan@ouc.edu.cn

中图分类号: P736.2
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出版历程
- 收稿日期: 2010-02-09
- 修回日期: 2010-04-14

THE EFFECT OF CALCIUM CARBONATE ON SEDIMENT AGGREGATION IN THE INTERTIDAL ZONE OF THE YELLOW RIVER ESTUARY

1 Key Laboratory of Marine Environment and Ecology(Ocean University of China), Ministry of Education, Qingdao 266100, China;
2 College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China

摘要

摘要: 黄河口潮间带沉积物团聚体的稳定性直接影响到海岸带的侵蚀过程。采用扫描电镜SEM、土壤物理和土壤化学领域的多种方法,对比分析影响黄土和黄河口沉积物团聚的主要物质基本理化性质,通过测定不同条件下碳酸钙和Ca²⁺对团聚度的影响,研究了碳酸钙和Ca²⁺的团聚作用和对黄河口沉积物水稳定性的影响。结果表明,碳酸钙是影响黄河口沉积物团聚的主要物质,其含量与黄土中的含量相当,为10.67%,而沉积物的平均粒径比黄土小,说明碳酸钙以微晶态形式胶结黏粒形成小粒径颗粒,被径流通过河道带到黄河三角洲沉积下来。碳酸钙的团聚呈现出粒级越大碳酸钙含量越高的趋势,对比碳酸钙与Ca²⁺对黄河口沉积物的团聚作用表明,碳酸钙对颗粒的团聚作用比Ca²⁺的团聚作用强。黄河口沉积物黏粒基本上不是分散存在的,而是被碳酸钙团聚成微团聚体存在的,在长期的往复潮流和波浪的作用下更加明显。
- 碳酸钙 /
- 团聚作用 /
- 潮间带 /
- 沉积物 /
- 黄河口
Abstract: The stability of the sediment aggregation directly impact the erosion process of the Yellow River estuary coast zone. Some methods, including scanning electron microscope, soil physical and chemical analysis, were used to analyze and contrast the basic physical and chemical properties of the loess and the sediments in the Yellow River estuary. A study was implemented on the aggregate influence of calcium carbonate and Ca²⁺ on sediments of the Yellow River estuary by testing aggregation values under different conditions. The results demonstrate that calcium carbonate is the main material of sediment aggregation in the Yellow River estuary. The average calcium carbonate content is 10.67% that consists with Calcium carbonate content in loess. This indicates that calcium carbonate in the form of microcrystals aggregates fine particles, which are carried along the Yellow River and deposited in Yellow River estuary. There exists a tendency that calcium carbonate contents are higher in bigger size particles than in smaller ones. Calcium carbonate shows stronger aggregation than calcium ion. The clay particles in the Yellow River estuary are not basically dispersed and mainly exist in form of microaggregats because of the aggregation of calcium carbonate. This phenomenon is more obvious under the long-term effect of back and forth currents and waves.
- calcium carbonate /
- aggregate /
- microaggregation /
- sediments /
- Yellow River estuary

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