Distribution and risk of mercury in the sediments of mangroves along South China Coast
Distribution and risk of mercury in the sediments of mangroves along South China Coast
复制标题
华南沿海红树林沉积物中汞的分布及风险
DOI：
10.1007/s10646-020-02238-9
复制
发表时间：
2020
期刊：
影响因子：
2.7
通讯作者：
Wang You-Shao
中科院分区：
文献类型：
--
作者：
Ma Rui-Fei;Cheng Hao;Inyang Aniefiok;Wang Ming;Wang You-Shao
The importance of mangrove was widely reported. However, the potential risks of pollutants (e.g., Hg) accumulated in the mangroves are often ignored. Thus, the present study aimed to explore the distribution and risk of mercury (Hg) in the sediments of mangroves along South China Coast. Results showed that concentrations of total Hg ranged from 0.0815 to 0.6377 mg/kg, with an arithmetic mean value of 0.2503 mg/kg. The contamination index (Pi) showed mild pollution toxicity risks in NS, slight toxicity risks in DZG, QZ, SY, ND, GQ, TLG, and free pollutions in BMW, SJ, ZJK and BLHK. NS, DZG and SY scored the highest values ofIgeoamong the eleven mangrove regions studied, indicating moderate to heavy pollution inputs in these regions. As for the distribution of Hg in the sediments along tidal gradient, concentrations of Hg in the sediments sharply increased from seaward mudflat to landward mangrove, corresponding with the increases of TOC. In summary, the present data indicated that mangrove ecosystem is efficient in Hg reservoir. However, the potential ecological risks of Hg, especially in some mangrove regions easily affected by human activities, should be noted.
