巢湖流域"河流-湖泊"系统沉积物中氮、磷赋存特征的研究
Occurrence characteristics of nitrogen and phosphorus in sediments of the"river-lake"system in Chaohu Lake basin
张鸿志 1朱超 2崔康平 1陈奕涵1
作者信息
- 1. 合肥工业大学资源与环境工程学院,安徽 合肥 230009
- 2. 安徽省生态环境监测中心,安徽 合肥 230031
- 折叠
摘要
巢湖流域作为一个拥有众多支流的大型流域,形成了典型的"河流-湖泊"系统.采集了巢湖流域中入湖河流及湖泊中表层沉积物,测定了各形态氮、磷含量.结果表明:巢湖流域沉积物中各形态氮依次为有机物与硫化物结合态氮(321.2 mg/kg)＞离子交换态氮(191.2 mg/kg)＞铁锰氧化态氮(79.6 mg/kg)＞碳酸盐结合态氮(43.3 mg/kg),其中季节性变化对离子交换态氮的影响最大;各形态磷依次为铁铝结合态磷(331.3 mg/kg)＞钙结合态磷(220.7 mg/kg)＞有机磷(186.5 mg/kg),其中季节性变化对铁铝结合态磷的影响最大.综合污染指数评价表明,巢湖流域沉积物中总氮、总磷污染水平分别为轻度、中度.
Abstract
As a large watershed with many tributaries,Chaohu Lake basin was a typical"river-lake"system.Surface sediments were collected from rivers and lakes in Chaohu Lake basin,and various forms of nitrogen and phosphorus were determined.The results showed that the various forms of nitrogen in the sediment of Chaohu Lake basin were as follows:organic and sulfide bound nitrogen(321.2 mg/kg)＞ion-exchange nitrogen(191.2 mg/kg)＞ferromanganese oxidized nitrogen(79.6 mg/kg)＞carbonate bound nitrogen(43.3 mg/kg),with seasonal variations having the most significant effect on ion-exchange nitrogen.And the various forms of phosphorus were iron and aluminum bound phosphorus(331.3 mg/kg)＞calcium bound phosphorus(220.7 mg/kg)＞organic phosphorus(186.5 mg/kg),with seasonal variations having the most significant effect on iron and aluminum bound phosphorus.The comprehensive pollution index evaluation showed that the total nitrogen and total phosphorus pollution levels in the sediment of Chaohu Lake basin were mild and moderate,respectively.
关键词
"河流-湖泊"系统/巢湖流域/氮形态/磷形态/释放风险Key words
"river-lake"system/Chaohu Lake basin/nitrogen form/phosphorus form/release risk引用本文复制引用
基金项目
国家自然科学基金青年科学基金(42007330)
合肥工业大学校学术新人提升计划(B)(JZ2021HGTB0112)
出版年
2024
NETL
NSTL
万方数据