Effects of climatic factor variations on toxic pollutants in the lake systems:A case study in twelve urban lakes in Beijing, China
Public concern has been raised in recent years about the damage to the human health causing by environmental toxic contaminants, such as fluoride and penols in the freshwater system. In addition to pollutants discharged by human activities, variations in climatic factors may also influence the transformation and migration of toxic contaminants. However, few studies focus on relationship between toxic contaminants and climatic factors. In this research, response of toxic contaminants in twelve urban lakes in Beijing to variations of climatic factors was studied. Fluorides, volatile phenols, arsenic (As), and selenium (Se), and general water quality parameters such as water temperature and pH etc. were analyzed from 2009 to 2011. Results indicated that fluoride and As concentrations in most urban lakes exhibited significant positive correlation with precipitation mainly due to rainfall induced diffuse pollution. In addition, volatile phenol concentration was negatively correlated with temperature and precipitation, which could be explained by warm temperature caused higher degradation rate and dilution effect. As for Se, there was no significant correlation found with climatic factors, which was attributed to low Se contents in the lakes. Beijing is undergoing increased temperature and heavy rainfall frequency as well as decreased wind speed during the past five decades; the above results infer that water quality of most urban lakes of Beijing is becoming worse under this climate change trend. This study suggested that urban lakes with different trophic states will respond differently to global climate change, and highly eutrophic lakes might face big challenges of water quality deterioration and algae bloom.
Climate variability Urban lakes Toxic contaminants Water management
Q.Wu X.H.Xia X.L.Mou
State Key Laboratory of Water Environment Simulation,School of Environment, Beijing Normal University, Beijing 100875, Chi
国际会议
The 3rd Biennial ISRS Symposium Achieving Healthy and Viable Rivers (ISRS)第3届国际河流大会
北京
英文
127-138
2013-08-05（万方平台首次上网日期，不代表论文的发表时间）