期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 704, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.scitotenv.2019.135318
关键词
Phosphorus forms; Bio-available P; Internal release; Sediment; Reservoir
资金
- National Natural Science Foundation of China [41771516, 41371457]
- Key Special Program on Science and Technology for Pollution Control and Treatment of Water Bodies of China [2013ZX 07113001]
- Yuqiao Reservoir Special Project of the Water Bureau of Tianjin City, China
The level of eutrophication in reservoirs is dependent on their internal and external P loads. Identifying the P pollution characteristics and its fractional composition in sediments is therefore necessary to determine the potential bioavailability and dominant sources of P for effective water pollution control. In this study, we investigated the P pollution characteristics in the overlying water and sediment in a chain of reservoirs (the Panjiakou (PJK), Daheiting (DHT) and Yucjiao (YQ) Reservoirs) in North China. Our results showed that the P concentrations in the overlying water of the YQ Reservoir was higher than that of the PJK and DHT Reservoirs, but the sediment P loading and P bio-availability were lower than the PJK and DHT Reservoirs. However, the sediment P release risk in the YQ Reservoir was higher than the DHT and PJK Reservoirs. The YQ Reservoir was mainly polluted by internal sediment P release and external sources predominantly derived from the inflowing polluted Sha River Basin. Various forms of P in the DHT Reservoir decreased with depth, and the P in the overlying water column was mainly sourced from internal P release due to sediment accumulation of excess P from human activities. In recent years, the proportion of bio-available P (BAP) in the PJK and YQ Reservoirs had increased, and the proportion of the more inert Al-P and Ca-P in the PJK Reservoir decreased. Ca-P in the YQ Reservoir had also decreased, indicating that inert P has been gradually transformed into active P in the PJK and YQ Reservoirs in recent years. The observed differences in P loading and sedimentary P fractions indicate different pollution characteristics and sources between the three reservoirs. We therefore recommend site-specific remediation strategies for effective control on P pollution in the three eutrophic reservoirs. (C) 2019 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据