Zhu Yaojia, Christakos George, Wang Hengwei, Jin Runjie, Wang Zhiyin, Li Dan, Liu Yuxuan, Xiao Xi, Wu Jiaping
Zhejiang University, Ocean College, Zhoushan, Zhejiang 316021, China.
Zhejiang University, Ocean College, Zhoushan, Zhejiang 316021, China; Department of Geography, San Diego State University, San Diego, CA 92182, United States.
Mar Pollut Bull. 2022 Jan;174:113155. doi: 10.1016/j.marpolbul.2021.113155. Epub 2021 Dec 1.
This study compared the ability of Sargassum fusiforme to accumulate As, Cd, Cr, Cu, Ni, Pb and Zn in its five tissues (main branch, lateral branch, leaf, receptacles and pneumathode). The concentrations of these trace elements in seawater, surface sediments and different tissues of S. fusiforme were analyzed in different areas in Dongtong County (Wenzhou City, China). The presence of receptacle at all sites indicated that S. fusiforme had entered the mature stage. However, the proportion of each tissue in S. fusiforme in different sites was varied, indicating subtle differences in growth. S. fusiforme has a great capacity to accumulate trace elements, showing relatively high levels of As (28.2-64.2 mg kg) and Zn (19.9-80.8 mg kg). The elements are mainly stored in leaf, receptacles and pneumathode. Compared to element concentrations in the surrounding environment, the seaweed exhibited stronger bioconcentration capacity for As and Cd than for other elements. According to our health risk assessment results, the hazard index and carcinogenic risk were below the limit, suggesting that the S. fusiforme ingestion would not pose any health risk and the potential risk of intake branches was even lower than that of other tissues.
本研究比较了羊栖菜在其五个组织（主枝、侧枝、叶片、囊果和气室）中积累砷、镉、铬、铜、镍、铅和锌的能力。在中国温州市洞头县的不同区域，分析了海水、表层沉积物以及羊栖菜不同组织中这些微量元素的浓度。所有采样点均出现了囊果，这表明羊栖菜已进入成熟阶段。然而，不同采样点羊栖菜各组织的比例有所不同，这表明其生长存在细微差异。羊栖菜具有很强的微量元素积累能力，其砷（28.2 - 64.2毫克/千克）和锌（19.9 - 80.8毫克/千克）含量相对较高。这些元素主要储存在叶片、囊果和气室中。与周围环境中的元素浓度相比，该海藻对砷和镉的生物富集能力强于其他元素。根据我们的健康风险评估结果，危害指数和致癌风险均低于限值，这表明食用羊栖菜不会造成任何健康风险，且摄入其分支的潜在风险甚至低于其他组织。
