从沉积物中迁移的磷(P)的固定化增加了P失活物质中藻类有效磷库。

IF 8.1 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES
Chengxun Deng , Ziyi Li , Qiannan Shang , Jutao Liu , Xinyuan Liu , Xiaowei Liu , Changhui Wang
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引用次数: 0

摘要

通常在缺氧条件下,利用磷失活物质固定沉积物中释放的磷,是减少湖泊内部磷负荷以控制富营养化的一种常用方法。本研究发现,固载沉积物中释放的磷可诱导灭磷物质中藻有效磷(NaHCO3和氧化铁纸条可提取磷)的积累,在初始阶段甚至高于原始沉积物(分别为29.7%和85.7%),尽管在加入该物质后沉积物中以及从混合物中分离出来的沉积物中藻有效磷大幅减少。考虑到在沉积物再悬浮过程中有可能将P失活物质暴露于上覆水体的浮游植物系统中,这一积累表明,再悬浮物质有可能成为浮游植物生长的P源,增加了沉积物P固定方法的不确定性。今后的工作应更多地关注失活磷物质的再悬浮特性,以及在控制水体磷污染中,特别是在浅水湖泊中,增强失活磷物质对藻有效磷的固定化能力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Immobilization of phosphorus (P) migrated from sediment increasing algal-available P pool in P-inactivating material

Immobilization of phosphorus (P) migrated from sediment increasing algal-available P pool in P-inactivating material
Use of phosphorus (P)-inactivating material to immobilize P released from sediment, typically under anoxic condition, is a method often considered to reduce lake internal P loading for eutrophication control. This study found that immobilizing the released P from sediment induced accumulation of algal-available P (NaHCO3 and Fe oxide paper strip extractable P) in P-inactivating material which was even higher than those in raw sediment at initial stage (by 29.7% and 85.7%), although algal-available P substantially decreased in sediment after addition of the material and in the separated sediment from the mixtures. Given the possibility of exposing P-inactivating material to phytoplankton systems in overlying water typically during sediment resuspension, the accumulation suggested the potential of the resuspended material changing as P source for phytoplankton growth, increasing the uncertainties of sediment P immobilization method. Future work should focus more on the resuspension characteristics of P-inactivating material and on enhancing the capability of immobilizing algal-available P by the materials during internal P pollution control, especially in shallow lake.
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来源期刊
Chemosphere
Chemosphere 环境科学-环境科学
CiteScore
15.80
自引率
8.00%
发文量
4975
审稿时长
3.4 months
期刊介绍: Chemosphere, being an international multidisciplinary journal, is dedicated to publishing original communications and review articles on chemicals in the environment. The scope covers a wide range of topics, including the identification, quantification, behavior, fate, toxicology, treatment, and remediation of chemicals in the bio-, hydro-, litho-, and atmosphere, ensuring the broad dissemination of research in this field.
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