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林承奇,于瑞莲,胡恭任,何海星. 九龙江河口潮间带表层沉积物汞污染分布、赋存形态与生态风险[J]. 生态毒理学报, 2014, 9(5): 901-907
九龙江河口潮间带表层沉积物汞污染分布、赋存形态与生态风险
Distribution, Speciation and Ecological Risk of Mercury in the Intertidal Surface Sediments of Jiulong River Estuary
投稿时间:2014-04-22  修订日期:2014-08-12
DOI:10.7524/AJE.1673-5897.20140422001
中文关键词:    形态  生态风险  表层沉积物  九龙江河口
英文关键词:mercury  speciation  ecological risk  surface sediment  Jiulong River estuary
基金项目:国家自然科学基金项目(21077036)和福建省自然科学基金项目(2011J01273)
作者单位
林承奇 华侨大学化工学院厦门 361021 
于瑞莲 华侨大学化工学院厦门 361021 
胡恭任 华侨大学化工学院厦门 361021 
何海星 华侨大学化工学院厦门 361021 
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中文摘要:
      研究九龙江河口汞污染情况可为该地区汞污染防治提供科学依据,测定九龙江河口潮间带表层沉积物中总汞含量及不同形态汞的含量,分析了汞的分布特征、赋存形态及生物有效性和潜在生态风险。结果表明:九龙江河口潮间带表层沉积物中总汞含量范围0.112~0.259 mg?kg-1,平均值0.172 mg?kg-1,部分采样点汞含量超过中国海洋沉积物质量第一类标准限值(0.20 mg?kg-1);沉积物中各形态汞平均比例顺序:残渣态(61.8%)>可氧化态(27.8%)>弱酸溶态(7.7%)>可还原态(2.6%),可提取态占有相当的比例,对水体汞污染具有一定贡献。潜在生态风险指数法评价结果可知,该河口区潮间带沉积物中汞污染程度和生态风险程度均为中等~较高水平,需对汞污染进行综合防治。
           
AuthorAffiliation
Lin ChengqiCollege of Chemical Engineering, Huaqiao University, Xiamen 361021, China
Yu Ruilian*College of Chemical Engineering, Huaqiao University, Xiamen 361021, China
Hu Gongren#College of Chemical Engineering, Huaqiao University, Xiamen 361021, China
He HaixingCollege of Chemical Engineering, Huaqiao University, Xiamen 361021, China
英文摘要:
      The pollution status of mercury was investigated to provide scientific foundation for the prevention and control of mercury pollution in Jiulong River estuary. Total and speciation contents of mercury were determined to discuss the distribution characteristic, bioavailability and potential ecological risk of mercury in the intertidal surface sediments of Jiulong River estuary. The results showed that the content range of total mercury was 0.112~0.259 mg?kg-1 with the average of 0.172 mg?kg-1. Total mercury contents at some sampling sites exceeded the first standard limit (0.20 mg?kg-1) of Chinese marine sediment quality. The average proportion of different speciation mercury to total mercury in the sediments presented a sequence of residual (61.8%) > oxidizable (27.8%) > weak acid soluble (7.7%) > reducible (2.6%). The considerable proportion of extractable mercury in the sediments indicated that the contribution of sediment mercury to the mercury pollution in estuary water should not be ignored. According to the evaluation results of potential ecological risk index, the pollution degree and ecological risk of mercury in the intertidal sediments was from moderate to considerably high in this estuary area. Comprehensive measures should be taken to control the mercury pollution in Jiulong River estuary.
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