三峡大学学报（自然科学版）2024，Vol.46Issue(3)：29-36,8.DOI:10.13393/j.cnki.issn.1672-948X.2024.03.005
原位覆盖对异龙湖底泥氮磷释放抑制效果的实验研究
Experimental Study on the Inhibition Effect of in-Situ Capping on Nitrogen and Phosphorus Release from the Sediment of Yilong Lake
摘要
Abstract
The release of nitrogen and phosphorus from sediment is one of the main processes promoting eutrophication of shallow lakes.Therefore,inhibition of internal loading is of great importance for lake restoration.In this study,the shallow eutrophic Yilong Lake was selected as the study site.The inhibitory effects of quicklime + gypsum(2∶1),quicklime + gypsum + red soil(2∶1∶1),iron trichloride modified kaolin(1∶4)and non-covering treatments on nitrogen and phosphorus release were studied for 36 d,in order to screen out the capping material which can effectively reduce the internal load in Yilong Lake.The results shows that all the three treatments reduce phosphorus flux from sediment.But quicklime-treated groups are unsuitable for lake restoration as quicklime addition increases p H in lake water substantially.Iron trichloride-modified kaolin can be used as capping material with 75.9%phosphorus reduction effect.It is also found that only iron trichloride modified kaolin could inhibit the release of nitrogen by 64.1%compared with the control group.Therefore,the iron trichloride-modified kaolin is the best capping material by considering its inhibitory effects and its ecological and environmental effects.The results of this study will provide a technical reference for endogenous control of nitrogen and phosphorus in large plateau eutrophic lakes,especially in Yilong Lake.关键词
富营养化/高原湖泊/物理覆盖/内源负荷/底泥释放Key words
eutrophication/plateau lakes/physical coverage/endogenous load/sediment release分类
资源环境引用本文复制引用
范雨春,刘智,刘流,陈光杰..原位覆盖对异龙湖底泥氮磷释放抑制效果的实验研究[J].三峡大学学报（自然科学版）,2024,46(3):29-36,8.基金项目
云南省科技厅社会发展重大专项(202203AC100002) （202203AC100002）
云南省科技厅异龙湖高原浅水湖泊云南省野外科学观测研究站(202305AM070002) （202305AM070002）
