摘要
为了解江苏连云港海州湾海洋牧场的环境状况,通过采集20个站位的表层水体和沉积物样品,对海水和沉积物中的8种重金属元素(Cr、Ni、Cu、Zn、Pb、Cd、As、Hg)进行测定;采用物种敏感性分布法、地累积指数法和潜在生态风险指数法评估海州湾的重金属污染状况及生态风险程度,并结合PCA/APCS模型对沉积物重金属的可能来源进行定量分析,可为海洋污染防控和海水养殖绿色高质量发展提供科学依据。结果表明:(1)物种敏感度分布法评估认为海水中的As具有高生态风险,Cd、Cu和Zn处于中度生态风险;(2)综合生态风险指数发现海州湾海洋牧场沉积物中重金属处于中度生态风险状态,主要受到Cd与Hg的影响;(3)由受体模型定量分析可知,海洋牧场重金属污染的潜在来源主要包括养殖中产生的污染、陆源排污及2009年以前的临河口排污,其中养殖产生的污染对Cu、Zn、Ni、Pb和Cr的贡献率大于50%,陆源排污对As和Cd的贡献率分别为40.33%和82.85%,而Hg主要受2009年以前临河口排污的影响。
In this study,we explored the spatial distribution of eight heavy metals in the surface water and sediment of Haizhou Bay Marine Ranch.The heavy metal pollution and ecological risk were then evaluated using species sensitivity distribution,the geoaccumulation index and the potential ecological risk index.Sources of heavy metals to the surface water and sediment were identified using PCA/APCS.The objectives were to better understand environmental conditions in the Haizhou Bay Marine Ranch and provide a scientific basis for the prevention and control of marine pollution and sustainable development of marine aquaculture.In December 2019,surface water and sediment samples were collected at 20 stations for determination of eight heavy metals(Cr,Ni,Cu,Zn,Pb,Cd,As and Hg).Results show that:(1)The average concentrations of Cu,Cd,Cr,Zn,As and Hg in the surface water samples were 0.91,0.06,0.10,5.85,1.82 and 0.04μg/L,respectively,and Ni and Pb were not detected.The average concentrations of Cu,Pb,Cd,Cr,Ni,Zn,As and Hg in the sediment samples were 22.43,23.78,0.13,65.86,27.99,60.18,9.25 and 0.04 mg/kg,respectively.The heavy metal concentrations in both water and sediment samples all met the first degree Sea Water Quality Standard and Marine Sediment Quality Standard.The potential ecological risk of heavy metals in the surface sea water was evaluated by the species sensitivity distribution method and results show that As poses a high ecological risk,Cu,Cd and Zn pose a medium ecological risk,and Cr and Hg pose a low ecological risk.(2)The comprehensive ecological risk index shows that heavy metals pose a medium ecological risk in the sediments,contributed primarily by Cd and Hg.(3)According to quantitative analysis using the PCA/APCS model,potential sources of heavy metal pollution were breeding pollution,land-based pollution and river discharges before 2009.Among the sources,breeding contributed more than 50%of the Cu,Zn,Ni,Pb and Cr.The contribution of land source pollution to As and Cd was 40.33%and 82.85%,respectively,a
作者
封苏兰
李玉
朱琳
谢艺萱
洪晨飞
卢霞
李向阳
王雪
FENG Su-lan;LI Yu;ZHU Lin;XIE Yi-xuan;HONG Chen-fei;LU Xia;LI Xiang-yang;WANG Xue(College of Ocean Technology and Surveying and Mapping,Jiangsu Ocean University,Lianyungang 222005,P.R.China;Yellow Sea Fisheries Research Institute,Chinese Academy of Fishery Sciences,Key Laboratory of Sustainable Development of Marine Fisheries,Ministry of Agriculture and Rural Affairs,Shandong Provincial Key Laboratory of Fishery Resources and Ecological Environment,Qingdao 266071,P.R.China;School of Geography and Surveying and Mapping,Suzhou University of Science and Technology,Suzhou 215009,P.R.China)
出处
《水生态学杂志》
CSCD
北大核心
2023年第5期114-122,共9页
Journal of Hydroecology
基金
江苏省自然科学基金面上项目(BK20171262)
江苏省海洋科学与技术优势学科建设工程项目(5511202001X)
江苏海洋大学2020年大学生创新创业训练项目(SY202011641107004)。
关键词
海洋牧场
生态风险
重金属
污染物
海州湾
marine ranch
ecological risk
heavy metals
pollutant sources
Haizhou Bay
