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Concentration level of dissolved cadmium and its variation in surface seawater of Urasoko Bay, Ishigaki Island

机译:石垣岛浦子湾中溶解镉的浓度水平及其在表层海水中的变化

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From April 2005 to March 2006, the concentration of dissolved cadmium (Cd) was monitored in the surface seawater of Urasoko Bay, which is in a subtropical area of the North Pacific Ocean and is surrounded by a well-developed fringing reef. During this period, the observed salinity and Cd concentrations varied in a range of approximately 16–34.5 and 4.8–77.8 pM, respectively. The concentration range of Cd obtained in this study was considered to be too low to damage the coral species, and its variation throughout the year did not show any seasonality and was not connected with climate data. The Cd-salinity plot for all the data in the salinity range over 26 showed apparent non-conservative behavior, which suggests a possible irregular input of Cd from a solid phase through streams and groundwater, release from bottom sediments, and atmospheric deposition into the bay.
机译:从2005年4月到2006年3月,对位于北太平洋亚热带地区的浦那湾表层海水中的溶解镉(Cd)浓度进行了监测,四周环绕着发达的珊瑚礁。在此期间,观测到的盐度和Cd浓度分别在大约16–34.5和4.8–77.8 pM之间变化。这项研究中获得的Cd浓度范围被认为太低而无法破坏珊瑚种类,并且其全年的变化没有显示任何季节性,并且与气候数据无关。盐度范围内超过26的所有数据的Cd盐度图均显示出明显的非保守行为,这表明固相可能通过河流和地下水从固相中不规则地输入Cd,从底部沉积物中释放出镉,并将大气沉积到海湾中。

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