The interaction between nutrients and heavy metals in lakes and rivers entering lakes

作者：Shuhang Wang, Xizhi Li, Xia Jiang, Yang Zhang, Jinbo Zhang, Yanxiao Liu, Huaicheng Guo, Zheng Li, Zhenghui Fu · 发表于：Ecological Indicators · 年份：2024 · DOI：10.1016/j.ecolind.2024.111963 · 被引用次数：22 · 研究领域：Water Quality and Pollution Assessment、Aquatic Ecosystems and Phytoplankton Dynamics、Heavy metals in environment

This study investigated the conditions and modes of interaction between nutrients and heavy metals within river and lake environments under multivariate conditions. Nitrogen and phosphorus nutrients were categorized into dissolved phosphorus, inorganic phosphorus, dissolved nitrogen, ammonium nitrogen, and nitrate nitrogen based on their chemical composition. Their correlations with heavy metal elements were scrutinized utilizing Bayesian models. The results revealed the following: (1) A robust interrelationship was observed between sediment metals and soluble metals within lake sediments and water bodies. (2) In lake environments, the competition between metals was relatively weak, and the influence of environmental factors was variable, without discernible patterns. This phenomenon may be attributed to the low concentration of soluble metals in the overlying water in the absence of external inputs. (3) Competition between metals in river sediment was weaker than that in lakes. This may be attributed to the flow dynamics and velocity of rivers, coupled with their strong self-purification ability. (4) Dissolved phosphorus (DP) exhibited greater control over the direction of metal adsorption and desorption compared to inorganic phosphorus (IP). (5) Similarly, dissolved total nitrogen (DTN) exhibited greater control over the direction of metal adsorption and desorption in river sediments compared to total nitrogen (TN). (6) Nitrate (NO3–-N) and ammonium (NH4+-N) simultaneously ...