PDF
Full
Outline
The transport of phosphorus by suspended sediment plays a pivotal role as a nutrient and ecological factor in aquatic environments, particularly in the complex hydrodynamic and sedimentary settings of Jiangsu’s coastal tidal flats, where diverse organic coatings on sediment surfaces further complicate sediment dynamics. Investigating the impact of organic matter on both sediment transport and phosphorus adsorption processes, therefore, is crucial for predicting phosphorus dynamics in coastal tidal flats and nearshore waters. To elucidate the influence of organic matter content and sediment initiation characteristics on aqueous phosphorus mass concentrations, this study employs xanthan as a model organic substance. Through sediment initiation-resuspension-adsorption experiments and constant-temperature oscillation tests, the study systematically examines how xanthan alters sediment mobility and phosphorus adsorption under varying flow conditions. The research findings are as follows: (1) Xanthan significantly impedes the initiation of sediment motion from the bed, enhancing the bed’s resistance to erosive shear stress by approximately twofold. (2) Sediment initiation characteristics act as a direct determinant in the adsorption of phosphorus by the bed sediment, a marked increase in aqueous phosphorus concentration is observed only after substantial sediment initiation commences. (3) While xanthan itself has negligible direct impact on phosphorus adsorption, it indirectly suppresses phosphorus adsorption by the bed sediment through inhibiting sediment initiation.
PDF
333
135
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
关闭全屏
No. 86 Xueyuan South Road, Haidian District, Beijing
010-62199257
qkjq@cast.org.cn
Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House
