渔业科学进展2016，Vol.37Issue(4)：54-59,6.DOI:10.11758/yykxjz.20150602002
渤海中部海域水体中Hg、As的时空分布特征
The Temporal and Spatial Distribution of Mercury and Arsenic in the Central Bohai Sea
摘要
Abstract
To study the temporal and spatial distribution of Mercury (Hg) and Arsenic (As) in the central Bohai Sea, we collected water samples of the surface, middle, and bottom layers in four survey cruises in May (spring), July (summer), November (autumn) and December (winter) in 2013. The results showed that the content of Hg was in the range of 0.0029–0.3926μg/L with an average of 0.0676μg/L. The vertical distribution of Hg concentration followed the order: bottom layer > middle layer > surface layer; the seasonal distribution showed the pattern: spring > winter > autumn > summer.Except for the surface layer in summer, Hg concentration in all water samples failed to meet the national water quality standard (GB3097–1997). The concentration of As ranged from 0.65 to 10.83μg/L with the mean value of 1.50μg/L, which met the requirement for the national water quality standard (GB3097–1997). The vertical distribution of As followed the order: surface layer > middle layer > bottom layer, and the seasonal distribution displayed an even pattern. The limit of As concentration is 20μg/L according to the national water quality standards, thus the As level met the first water quality standard. However, the Hg level was readily higher than the first (0.05μg/L) or second water quality national water quality standard (0.20μg/L). These data suggested that the overall water quality of the central Bohai Sea was unsatisfying, and there was obvious pollution probably caused by human activities. Therefore the environmental risks in the Bohai Sea should be carefully evaluated in the future economic activities.关键词
渤海中部/汞/砷/影响因素Key words
The central Bohai sea/Mercury/Arsenic/Influence factor分类
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杨茜,夏斌,孙耀,陈聚法,张艳,曲克明,赵俊,崔正国..渤海中部海域水体中Hg、As的时空分布特征[J].渔业科学进展,2016,37(4):54-59,6.基金项目
农业部溢油专项“渤海生态环境监测与评估”(农办渔【2012】117号)和“应对溢油关键技术专项研究”(2012-NZ-5739)共同资助。杨茜，E-mail：yangqian@ysfri.ac.cn （农办渔【2012】117号）
