滇池有机污染物(COD)特征与来源解析
CHARACTERISTICS OF ORGANIC POLLUTANTS(COD)AND THEIR SOURCE IN DIANCHI LAKE
闫晗 1王胜楠 1陈卓 1刀国华 2沈谟禺 1郭洪发 1杨姣姣 3朱宇 3潘珉 3胡洪营4
作者信息
- 1. 清华大学 环境学院环境模拟与污染控制国家重点联合实验室 国家环境保护环境微生物利用与安全控制重点实验室环境前沿技术北京实验室,北京 100084
- 2. 昆明理工大学 环境科学与工程学院,昆明 650500
- 3. 昆明市滇池高原湖泊研究院,昆明 650228;滇池湖泊生态系统云南省野外科学观测研究站,昆明 650228
- 4. 清华大学 环境学院环境模拟与污染控制国家重点联合实验室 国家环境保护环境微生物利用与安全控制重点实验室环境前沿技术北京实验室,北京 100084;清华苏州环境创新研究院,江苏苏州 215163
- 折叠
摘要
目前,滇池仍然存在有机污染压力,全面解析湖体化学需氧量(COD)特征和有机污染物来源,将有助于滇池的精准治理与污染防控.通过三维荧光光谱法分析滇池湖体有机物特征,并通过质量衡算分析2020年全年有机污染输入输出量.结果表明,滇池外海东部和西部的COD浓度较高,湖体有机质呈现自源性特征.全年有机污染输入总量约43648 t.其中,城市面源和微藻分泌的有机污染输入量分别占输入总量的34.6％和31.4％,是最主要输入源.输入总量的18.9％会积累在湖体中.为缓解滇池有机污染,需要加强城市面源控制、微藻捕捞和底泥疏浚等方面的措施.该结果将为滇池有机污染治理提供理论支持.
Abstract
Organic pollution is still prevalent in Dianchi Lake.A comprehensive understanding of the characteristics and sources of chemical oxygen demand(COD)would contribute to the precise management and pollution prevention.The present work employed three-dimensional fluorescence spectroscopy to analyze the organic matter characteristics in Dianchi Lake and utilized mass balance calculations to assess the annual input and output of organic pollution in 2020.The results revealed that the COD concentrations were relatively higher in the eastern and western regions of Waihai,and the organic matter of the lake exhibited autogenous characteristics.The total input of COD throughout the year was estimated to be approximately 43648 tons.Urban non-point source pollution and carbon fixation by microalgae were the main inputs and accounted for 34.6％and 31.4％of the total input volume,respectively.Furthermore,18.9％of the total input accumulated within the lake.To mitigate organic pollution in Dianchi Lake,measures such as strengthening urban runoff control,microalgal harvesting,and sediment dredging were necessary.These findings provided theoretical support for the management of organic pollution in Dianchi Lake.
关键词
滇池/有机污染/有机物组分/三维荧光/质量衡算Key words
Dianchi Lake/organic contamination/organic components/three-dimensional fluorescence/mass equilibrium引用本文复制引用
基金项目
国家重点研发计划(2020YFC1806302)
昆明市科技计划(YSZJGZZ2020018)
出版年
2024
NETL
NSTL
万方数据