文章摘要
石一茜,赵旭,俞锦辰,林军,韩星雨,刘臻,黄宏.马鞍列岛人工鱼礁修复海域沉积物重金属形态组成及垂直分布特征[J].水产学报,2019,43(9):1952~1962
马鞍列岛人工鱼礁修复海域沉积物重金属形态组成及垂直分布特征
Assessment of the speciation and vertical distribution characteristics of heavy metals in sediments in artificial reef waters of Ma'an Archipelago
投稿时间:2019-05-31  修订日期:2019-07-31
DOI:10.11964/jfc.20190511821
中文关键词: 人工鱼礁  柱状沉积物  重金属形态  BCR连续提取法  地积累指数  潜在生态危害指数  马鞍列岛
英文关键词: marine ranching  core sediment  heavy metal  BCR  geoaccumulation index  potential ecological risk index  Ma'an Archipelago
基金项目:国家重点研发计划(2018YFD0900704);上海市科技兴农计划(沪农科字2018第4-16号)
作者单位E-mail
石一茜 上海海洋大学海洋生态与环境学院, 上海 201306  
赵旭 上海海洋大学海洋生态与环境学院, 上海 201306  
俞锦辰 上海海洋大学海洋生态与环境学院, 上海 201306  
林军 上海海洋大学海洋生态与环境学院, 上海 201306  
韩星雨 上海海洋大学海洋生态与环境学院, 上海 201306  
刘臻 上海振华重工(集团)股份有限公司, 上海 201100  
黄宏 上海海洋大学海洋生态与环境学院, 上海 201306 hhuang@shou.edu.cn 
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中文摘要:
      为了解马鞍列岛人工鱼礁海域沉积物重金属形态组成及垂直分布特征,于2018年6月采集该海域附近柱状沉积物样品,通过测定柱状沉积物粒度组成,同时采用改进后沉积物重金属形态分析的连续提取法(European community bureau of reference, BCR)分析了7种重金属(Cd、Cu、Zn、Pb、Cr、As、Ni)各形态含量,并结合地累积指数法(Igeo)、相关性以及潜在生态危害指数等分析方法,探索了马鞍列岛海域沉积物中重金属的垂直分布特征及其来源。结果显示,柱状沉积物粒度组成(D [3,2])以细粉砂粒为主;柱状沉积物重金属的含量总体上随深度呈锯齿状波动,在0.5 m和2.0 m时达到极值;7种重金属总量均可满足我国海洋沉积物质量I类标准;重金属Cd以次生相为主,可交换态及碳酸盐结合态(F1)、Fe/Mn氧化物结合态(F2)及有机物及硫化物结合态(F3)3种形态百分组成基本相当,其余6种重金属均以残渣态为主要赋存形态;7种重金属有效态垂直变化趋势具有周期性和一致性;以惰性元素Ni作为参比,综合3种分析方法进行来源识别,结果显示,柱状沉积物中的重金属Cu、Zn、Pb、Cr、As、Ni主要是自然沉积的结果,而Cd在个别深度存在污染累积,是否存在生态风险,还待进一步研究;后续可结合稳定同位素测年法,探索重金属含量及形态随年代的变化,进一步确定重金属污染的历史记录。研究表明,马鞍列岛附近海域重金属受人为因素影响较小,污染程度较低,可较准确地反映该海域沉积物重金属的本底值。
英文摘要:
      In order to understand the characteristics of speciation and vertical distribution of heavy metals in the sediments, columnar sediments were collected in surrounding waters of Ma'an Archipelago in June 2018. Seven heavy metals (Cd, Cu, Zn, Pb, Cr, As, Ni) were analyzed, with the improved European Community Bureau of Reference (BCR) method, by measuring the grain size composition of columnar sediments, and the vertical distribution characteristics and sources of heavy metals in the sediment of Ma'an Archipelago, by combining the analyzing method, Igeo, correlation and potential ecological risk index, were explored. The results showed that fine silt (D[3,2]) was dominant in the columnar samples; the content of heavy metals in the columnar samples fluctuated serratedly with depth. The total amount of seven heavy metals reached the peak at 0.5 m and 2.0 m; all of them reached the class I standard of marine sediment quality in China; Cd was dominated by secondary phase, which was composed of the exchangeable and carbonate fractions (F1)、iron-manganese oxide states (F2) and organic matter and sulfide fractions (F3), The proportion of three fractions was similar; the mode of occurrence of Cu, Zn, Pb, Cr, As, Ni was residual state, and the trend of effective state of seven heavy metals was periodic and consistent. Take Ni as a reference, with three analytical methods,results showed that Cu, Zn, Pb, Cr, As and Ni are mainly natural deposition, and whether Cd is a threat to the environment still remains for further study. Through three analytical methods, we can observe the content and morphology changing by years of heavy metals by means of isotope dating, aiming to determine the historical records and influencing factors of heavy metal pollution. The pollution degree of heavy metals in surrounding waters near Ma'an Archipelago is much lower, and the ecological environment is totally well protected, and the environment is less affected by human factors, reflecting the results of local sediment background values.
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