| 长江口及邻近海域沉积物再悬浮对水体磷酸盐的影响的模拟研究 |
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| 引用本文： | 矫恒晨,王盼盼,简慧敏,姚庆祯.长江口及邻近海域沉积物再悬浮对水体磷酸盐的影响的模拟研究[J].海洋学报,2017,39(4):28-38. |
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| 作者姓名： | 矫恒晨 王盼盼 简慧敏 姚庆祯 |
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| 作者单位： | 1.中国海洋大学 海洋化学理论与工程技术教育部重点实验室, 山东 青岛 266100;中国海洋大学 化学化工学院, 山东 青岛 266100 |
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| 基金项目： | 鳌山科技创新计划项目（2016ASKJ02）；国家自然科学基金（41276070）。 |
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| 摘 要： | 以长江口及邻近海域为研究区域，采用改进后的SEDEX法对沉积物中各形态磷的含量进行了分析，并通过模拟实验探讨了沉积物再悬浮对上覆水体磷酸盐浓度的影响。结果表明:碎屑磷（De-P）是沉积物磷的主要赋存形态，占总磷（TP）的50%以上；其次是可提取态有机磷（Or-P）和非活性有机磷（Re-P）；生物可利用磷（BAP）占总磷的比例约为21%，可提取态有机磷（Or-P）是生物可利用磷（BAP）的主要存在形态。沉积物再悬浮时，水体磷酸盐的浓度显著升高，说明沉积物再悬浮会引起沉积物中磷的释放；水体磷酸盐浓度升高主要源于沉积物中磷的释放，而间隙水的贡献较低。沉积物发生再悬浮时，厌氧条件相对于好氧条件，更有利于沉积物磷的释放。
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| 关 键 词： | 长江口 沉积物再悬浮 磷形态 磷酸盐 |
| 收稿时间： | 2016/5/20 0:00:00 |
| 修稿时间： | 2016/10/23 0:00:00 |
Simulation study of the effects of sediment resuspension on phosphate loading in the Changjiang Estuary and its adjacent area |
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| Jiao Hengchen,Wang Panpan,Jian Huimin and Yao Qingzhen.Simulation study of the effects of sediment resuspension on phosphate loading in the Changjiang Estuary and its adjacent area[J].Acta Oceanologica Sinica (in Chinese),2017,39(4):28-38. |
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| Authors: | Jiao Hengchen Wang Panpan Jian Huimin and Yao Qingzhen |
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| Affiliation: | 1.Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China;College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China2.Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China |
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| Abstract: | Two core sediment were collected in the Changjiang Estuary and its adjacent area as study areas. The SEDEX method was applied to determined the forms of phosphorus in the sediments. Effects of sediment resuspension on the phosphate in the water column was studied. The results indicated that Detrital P was the highest form, which accounted for above 50% of TP. The contents of organic P and refractory P were also higher than other forms. Bioavailable P was accounted for 21% of TP. Organic P was the major part of bioavailable P. The concentrations of phosphate in overlying water was significantly higher when sediment resuspension occurred. It shows that sediment resuspension can cause the phosphourus in sediment to release. The increase of phosphate concentration in water mainly comes from the release of phosphorus in sediments. And the contribution of phosphate interstitial water is less than sediments. In addition, It is more favorable to the release of phosphorus in sediment resuspension in the anaerobic condition than that in the aerobic condition. |
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| Keywords: | Changjiang Estuary sediment resuspension phosphorous species phosphate |
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