李磊;任景玲;刘素美;乔旭东;蒋增杰;杜金洲;方建光;

• 1:中国海洋大学海洋化学理论与工程技术教育部重点实验室
• 2:国家海洋局第二海洋研究所卫星海洋环境动力学国家重点实验室
• 3:中国水产科学研究院黄海水产研究所
• 4:华东师范大学河口海岸学国家重点实验室

摘要(Abstract)：

作为一种毒性极强的重金属元素,汞在海洋中可以通过海洋生物的呼吸、摄食和吸附等过程被利用,并在沿食物链传递的过程中不断富集,最终危害人类的健康。利用冷原子荧光光度法(CV-AFS)对2011年4月、8月、10月和2012年1月桑沟湾溶解态无机汞(DIHg)和溶解态有机汞(DOHg)的含量进行了测定。结果表明,桑沟湾四个季节DIHg的浓度范围分别为52~865、131~359、31~134和22~119 pmol·L-1,DOHg的浓度范围分别为37~214、52~635、21~98和未检出~51 pmol·L-1。桑沟湾DIHg和DOHg具有相似的分布特征,均呈现出从近岸向外海逐渐降低的趋势,有明显的季节变化。桑沟湾DIHg和DOHg的周日变化与潮汐呈现出较好的负相关关系,且存在明显的昼夜差异。影响桑沟湾DIHg和DOHg分布的主要因素包括河流和地下水的输入、大气的干湿沉降、与黄海的交换、活性气态汞(Hg0)在海-气界面的交换、表层水体发生的光化学还原反应以及养殖生物的清除等。通过初步计算,桑沟湾溶解态汞(TDHg)的存留时间约为(1.27±0.53)年,远远低于大洋。根据美国国家环境保护局汞的质量标准和我国地表水环境质量标准,桑沟湾没有明显的汞污染。但海产品体内富集的汞可能会带来潜在的生态危机和食品安全问题,需要相关部门加以重视,确保桑沟湾养殖产业的平衡发展。

关键词(KeyWords)： 溶解态汞;形态;分布;季节变化;桑沟湾

Abstract:

Keywords:

基金项目(Foundation): 国家重点基础研究发展规划(973)项目(2011CB409801);; 国家自然科学基金项目(41176096);; 科技部国际科技合作项目(2010DFA24590)

作者(Author): 李磊;任景玲;刘素美;乔旭东;蒋增杰;杜金洲;方建光;

Email:

DOI:

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