State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China; University of Chinese Academy of Sciences, Beijing, 100049, China; Henan Normal University, College of Life Sciences, Xinxiang, 453007, China.
State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
Environ Pollut. 2019 Oct;253:516-524. doi: 10.1016/j.envpol.2019.07.042. Epub 2019 Jul 10.
Increasing amount of aluminum (Al) gets into aquatic ecosystem through anthropogenic activity, but the knowledge about Al migration and relationships with sediments possessing different physico-chemical properties in eutrophic lakes is limited. Here, the Al migration rule and relationships with sediment nutritions in the Hangzhou West Lake, China was investigated, where a certain amount of residual Al-salts can enter because of the pre-treatment of the Qiantang River diversion project every day. Results revealed the obvious spatial distribution heterogeneity of Al in sediment vertical direction and horizontal direction following water flow. The Al content in sediment ranged 0.463-1.154 g kg in Maojiabu Lake, and ranged 9.862-40.442 g kg in Xiaonanhu Lake. Higher Al content distributed in upper layer sediment in lake with more disturbance. Total nitrogen (TN) contents were higher 0.917-3.387 mg g and 0.627-0.786 mg g in upper layer sediment than that in lower layer in Maojiabu Lake and Xiaonanhu Lake, respectively. Total phosphorus (TP) content ranged 0.779-2.580 mg g, in which IP and Fe/Al-P contributed 24.9-80.8% and 17.0-51.6%, respectively. Correlations between Al content with nutrition, humic acid (HA) etc. of sediment regionally varied in Maojiabu and Xiaonanhu Lake. Spatial distribution of Al-salt in eutrophic lakes closely related with the physico-chemical characteristics of nutrients, humus, human disturbance and water division parameters. Results provides new insight into Al-salts migration and references for Al-risk evaluating in eutrophic lakes.
随着人为活动的增加，越来越多的铝（Al）进入水生生态系统，但关于富营养化湖泊中铝的迁移及其与具有不同物理化学特性的沉积物之间关系的知识还很有限。本研究调查了中国杭州西湖中铝的迁移规律及其与沉积物营养物质的关系，由于钱塘江引水工程的预处理，每天都会有一定量的残余铝盐进入西湖。结果表明，铝在沉积物垂直方向和水平方向上的分布存在明显的空间异质性，沿水流方向分布。在茅家埠湖，铝含量在 0.463-1.154 g kg 之间，而在小南湖，铝含量在 9.862-40.442 g kg 之间。受干扰较大的湖上层沉积物中铝含量较高。总氮（TN）含量在上层沉积物中分别高于下层沉积物 0.917-3.387 mg g 和 0.627-0.786 mg g。总磷（TP）含量在 0.779-2.580 mg g 之间，其中 IP 和 Fe/Al-P 分别占 24.9-80.8%和 17.0-51.6%。铝含量与营养物质、腐殖酸（HA）等的相关性在茅家埠湖和小南湖具有区域性差异。富营养化湖泊中铝盐的空间分布与营养物质、腐殖质、人为干扰和水分划分参数的物理化学特性密切相关。研究结果为富营养化湖泊中铝盐的迁移提供了新的见解，并为铝风险评估提供了参考。
