Trace element distribution in tissues and risk of exposure of ruddy shelduck wintering in Nanhaizi Wetland, Baotou, China
Trace element distribution in tissues and risk of exposure of ruddy shelduck wintering in Nanhaizi Wetland, Baotou, China
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包头南海子湿地红麻鸭组织微量元素分布及越冬暴露风险
DOI：
10.1007/s11356-019-07132-4
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发表时间：
2019-12-23
影响因子：
5.8
通讯作者：
Liu, Xiaoguang
中科院分区：
文献类型：
--
作者：
Liu, Li;Du, Chao;Liu, Xiaoguang
南海子湿地（NHZW）是中国包头黄河国家湿地公园的重要组成部分，是水禽的重要迁徙站和栖息地。黄河接纳了大量的工业和农业废水。因此，南海子湿地的环境质量直接影响包头地区候鸟的生存。我们旨在确定赤麻鸭组织中的微量元素分布和暴露风险，为鸟类保护和南海子湿地的环境质量评估提供科学依据。2018年1月，我们从南海子湿地采集了水、土壤以及18只死亡的赤麻鸭（9只雄性和9只雌性）。我们测量了样本中微量元素（镉、铅、铜、锌、汞和砷）的浓度，并对微量元素暴露风险进行了建模。微量元素浓度在羽毛中最高，其次是肾脏、肝脏和肌肉，依次递减。性别之间微量元素积累没有显著差异。水中汞的暴露剂量；土壤中铬、铅和铜的暴露剂量；以及玉米中铅、铜和汞的暴露剂量高于每日可耐受摄入量，可能对赤麻鸭产生不利影响。微量元素的计算危害商（HQ）排序如下：汞＞铬＞铅＞锌＞铜＞砷，其中汞和铬处于高风险水平（HQ＞1）
The Nanhaizi Wetland (NHZW) is a significant part of the Baotou Yellow River National Wetland Park in China, an important migration station and habitat for waterfowl. The Yellow River receives a significant amount of industrial and agricultural wastewater. Therefore, the environmental quality of NHZW directly affects the survival of migratory birds in the Baotou region. We aimed to determine the trace element distribution in tissues and risk of exposure in ruddy shelduck and to provide a scientific basis for bird protection and an environmental quality assessment for the NHZW. In January 2018, we collected water, soil, and 18 dead ruddy shelduck Tadorna ferruginea (nine males and nine females) from the NHZW. We measured concentrations of trace elements (Cd, Pb, Cu, Zn, Hg, and As) in the specimens and modeled the risk of exposure to trace elements. Trace element concentration was greatest in feathers, followed by the kidneys, liver, and muscle, in descending. There was no significant difference in trace element accumulation between sexes. Exposure doses of Hg in water; Cr, Pb, and Cu in soil; and Pb, Cu, and Hg in corn were higher than the tolerable daily intake and may adversely affect ruddy shelduck. The calculated hazard quotients (HQ) for trace elements were ranked as follows: Hg > Cr > Pb > Zn > Cu > As, where Hg and Cr were at high risk levels (HQ > 1).