在扰乱条件下的沉积物再悬浮系统中的释放和分布
Kun Wang1, Haoran Yang2, Yongsheng Chang2
1National Engineering Laboratory for Lake Pollution Control and Ecological Restoration, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China; Engineering Research Center of Ministry of Education on Groundwater Pollution Control and Remediation, College of Water Sciences, Beijing Normal University, Beijing, 100875, China.
Chemosphere
|May 22, 2024
概括
从悬浮沉积物中释放的 (P) 的风险比从底层沉积物中释放的风险更高,特别是在高度干扰的情况下. 持续的干扰促进了悬浮固体中P的释放,影响了水质.
科学领域:
- 环境化学环境化学
- 水上科学 水上科学
- 沉积物学的沉积物学
背景情况:
- 沉积物再悬浮是 (P) 释放到上层水域的主要原因之一.
- 了解重悬浮期间的P释放特征对于管理水生生态系统至关重要.
研究的目的:
- 为了研究沉积物再悬浮过程中颗粒 (PP) 的释放特性.
- 量化与沉积物相比,悬浮固体中P释放的风险.
主要方法:
- 在不同的旋转速度下对沉积物进行实验性再悬浮.
- 对分量的分析 (例如,可溶性反应性P,NaOH-P,HCl-P).
- 吸附参数 (EPC0F,KF,NAP,PSI) 和P和度 (DPS) 的确定.
主要成果:
- 悬浮固体比底层沉积物具有更高的P释放风险.
- 高强度复悬浮 (250radmin-1) 显著增加了颗粒物P度.
- 持续的干扰促进了从悬浮沉积物中释放吸附的P.
结论:
- 悬浮中的微粒P具有比沉积物中的P更大的释放风险.
- 沉积物干扰动力学会影响P.释放的形式和程度.
- 管理策略应考虑扰乱对水生系统中P循环的影响.
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