湖泊疏浚堆场淤泥污染及潜在生态风险评价  

Distribution and potential ecological risk assessments of contaminants insludge in dredged sediments landfill sites

作　　者：刘敏[1,2] 钟继承 余居华[1,2] 郑小兰[1,2] 范成新[1] LIU Min;ZHONG Jicheng;YU Junhua;ZHENG Xiaolan;FAN Chenxin(State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P.R.China;University o f Chinese Academy o f Sciences, Beijing 100049, P.R.China)

机构地区：[1]中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室,南京210008 [2]中国科学院大学,北京100049

出　　处：《湖泊科学》2016年第6期1185-1193,共9页Journal of Lake Sciences

基　　金：国家水体污染控制与治理科技重大专项(2013ZX07113001;2012ZX07101-010);国家自然科学基金项目(41171367;41371457)联合资助

摘　　要：疏浚淤泥内通常含有不同类型的有毒有害物质,在堆场直接堆放过程中可能会对周围环境产生有害影响.本文针对太湖及巢湖相应疏浚堆场内淤泥进行研究,探讨淤泥中重金属、多环芳烃以及多氯联苯等污染物含量及潜在生态风险;根据重金属的风险指数法和持久性有机污染物的风险商法,对各污染物的潜在生态风险进行定量分析.研究结果表明,太湖白旄堆场以及孔湾堆场淤泥内重金属及多环芳烃含量较小,潜在生态风险较低;巢湖南庄堆场淤泥内各类有害物质含量较大,种类较多,对于周围环境具有较高的潜在生态威胁.多氯联苯则在各个疏浚堆场淤泥中具有很高的积累量,潜在生态风险较高,应引起管理者的重视.Direct disposal of dredged sediments in landfill sites may possess potential ecological risks to environment as they are abundant in contaminant. An experiment was conducted to analysis the concentrations and potential ecological risks of different contaminants including heavy metals, polycyclic aromatic hydrocarbons ( P A U s) and polychlorinated biphenyls ( P C B s) in dredged sediment landfill sites in Lake Taihu and Lake Chaohu in China. According to the potential ecological risk assessments of heavy metals and risk quotients of persistent organic pollutants, the potential ecological risks of different contaminants were quantified.Results illustrate that potential ecological risks of dredged sediments are relatively low in landfill sites in Lake Taihu, while are considerable in Lake Chaohu. In addition, the high accumulations of PCBs in dredged sediments possess high potential ecological risks to environment, and need more attention from managers.

关 键 词：疏浚堆场 疏浚底泥 重金属 多环芳烃 多氯联苯 潜在生态风险 

分 类 号：X524[环境科学与工程—环境工程] X826