摘要
蟠龙河是南四湖上游的典型城市河流,其水生态健康直接影响到南四湖水体状况,因此查明蟠龙河沉积物中重金属的分布特征、辨识重金属来源和评估重金属潜在生态风险,对下游南四湖的水产养殖、农业灌溉以及居民生活用水具有重要意义。在对蟠龙河进行采样分析基础上,利用地累积指数法、潜在生态风险指数法进行风险评价,利用PMF模型进行重金属污染源的定量解析等系统性研究。结果表明:(1)蟠龙河沉积物主要重金属污染物为Cd、Cu、Zn。(2)蟠龙河水系潜在生态风险评级中等及以上风险程度的样点占到70%。(3)重金属污染源解析得出污染源自工业及城市活动源、自然源以及农业源,总贡献率分别为42%、40%、18%。(4)蟠龙河流经城市区域后重金属浓度有增长突变,主要受当地工业排污的影响。
The Panlong River is an important inflow of the Nansi Lake and its ecological health directly affects the state of the Nansi Lake.Therefore,to find out the distribution characteristics of heavy metals in sediments of the Panlong River,identify the source and evaluate the potential ecological risks of heavy metals is of great significance to the aquaculture,agricultural irrigation,and residential water use in the downstream regions.Based on the sampling analysis of the Panlong River,the risk assessment was carried out using the geological accumulation index method and the potential ecological risk index method,and the PMF model method was used for the quantitative analysis of heavy metal pollution sources.The results showed that:( 1)the main heavy metal pollutants in sediments of the Panlong River were Cd,Cu and Zn.( 2) The samples of a potential ecological risk level with moderate or above of the Panlong River accounted for 70%.( 3) According to the analysis of heavy metal pollution sources,the pollution sources were industrial and urban activity sources,natural sources and agricultural sources with the total contribution rate as 42%,40% and 18%,respectively.( 4) After flowed through the urban area,the concentration of heavy metals in the Panlong River increased suddenly,which was mainly affected by the local industrial sewage.
作者
魏青
金麟先
陈文怡
郭浩
Wei Qing;Jin Linxian;Chen Wenyi;Guo Hao(Enwironmental Monitoring Station of Xuecheng District,Zaozhuang City,Zaozhuang 277000,China;Shandong Xinhong Pharmaceutical Co.,Itd,Jinan 251600,China;Environmental Research Centre,Wageningen University,Wageningen 6708GA,Netherlands;Qingdao Jingcheng Testing Technology Co.,Itd,Qingdao 266555,China)
出处
《山东农业科学》
2020年第7期75-82,共8页
Shandong Agricultural Sciences
基金
山东省重点研发计划项目(2019GNC20400)。
关键词
蟠龙河
沉积物
重金属
潜在生态风险
源解析
Panlong River
Sediment
Heavy metals
Potential ecological risk
Source analysis
