Spatial variation and toxicity assessment for heavy metals in sediments of intertidal zone in a typical subtropical estuary (Min River) of China
Spatial variation and toxicity assessment for heavy metals in sediments of intertidal zone in a typical subtropical estuary (Min River) of China
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中国典型亚热带河口（闽江）潮间带沉积物重金属空间变化及毒性评价
DOI：
10.1007/s11356-017-9897-1
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发表时间：
2017-08
影响因子：
5.8
通讯作者：
Hu Xingyun
中科院分区：
文献类型：
--
作者：
Sun Zhigao;Li Jiabing;He Tao;Ren Peng;Zhu He;Gao Hui;Tian Liping;Hu Xingyun
在5个湿地（C1，芦苇沼泽; C2，芦苇和莎草; C3，C.重音符; C4，互花米草; 2015年7月，在中国典型的亚热带河口（闽江），沿着从湿地到滩涂的两条典型样带（T1和T2），分别采集了两条典型样带（C5，Cyperuscompressusmarsh）和两条典型样带（T1和T2），研究了潮间带重金属（Pb、Cr、Cu、Zn和Ni）的空间变异及其毒性。结果表明，除Pb和Zn外，两条样带表层沉积物中重金属含量均为Zn > Cr > Pb > Cu > Ni，从陆地到海洋略有降低。5种重金属在C5沼泽中的含量普遍最低，而Pb、Cr和Zn在C2沼泽中的含量最高。Pb、Cr和Zn含量的垂直变化在沼泽和样带之间存在差异，在大多数情况下，沉积物有机质（SOM）对沉积物沿着吸附重金属的贡献不明显，而颗粒组成是控制重金属空间变化的主要因素。Cu和Ni在湿地和样带中的垂直分布波动较小，这与硫对两种金属在剖面中的溶解性和迁移性的影响有关。与亚洲、欧洲、非洲和南美洲的大多数河口相比，闽江河口沉积物中的重金属含量要高得多。闽江口潮间带沉积物中5种重金属均为中度污染，其中Ni为主要污染重金属。潮间带沉积物中的Ni和Pb均表现出较高的潜在毒性，且对毒性单位之和的贡献较大。未来闽江口潮间带的金属污染可能会更加严重，如果不采取措施对金属污染沉积物进行修复，下一步将对濒危动物或候鸟造成长期的潜在后果。
Sediment samples were collected in five marshes (C1,Phragmites australismarsh; C2,P. australisandCyperus malaccensismarsh; C3,C. malaccensismarsh; C4,Spartina alternifloramarsh; and C5,Cyperus compressusmarsh) respectively along two typical transects (T1 and T2) extending from the vegetated marsh to the mudflat in a typical subtropical estuary (Min River) of China in July 2015 to investigate the spatial variation and toxicity of heavy metals (Pb, Cr, Cu, Zn, and Ni) in intertidal zone. Results showed that the concentrations of heavy metal in surface sediments of the two transects were in the order of Zn > Cr > Pb > Cu > Ni and slightly decreased from the land to the sea except for Pb and Zn. The levels of the five metals at C5 marsh were generally the lowest, while those of Pb, Cr, and Zn at C2 marsh were the highest. The vertical variations of Pb, Cr, and Zn concentrations in profiles differed among marshes or transects, and in most cases, there was no evidence of sediment organic matter (SOM) contributing to the sorption of significant amount of metals in sediments along the two transects, while grain composition was a primary factor controlling the spatial variations of metals. Both the vertical distributions of Cu and Ni levels among marshes or transects showed little fluctuation, which could be better explained by the effects of sulfur on the solubility and mobility of the two metals in profiles. Heavy metal levels in sediments of the Min River estuary were much higher compared with most estuaries in Asia, Europe, Africa, and South America. The sediments in intertidal zone of the Min River estuary were moderately polluted by the five metals, and particularly, Ni was identified as heavy metal of primary concern. Both Ni and Pb in sediments of the intertidal zone showed high potential toxicity and high contributions to the sum of the toxic units (ΣTUs). In future, the metal pollutions in intertidal zone of the Min River estuary might be more serious, and in the next step, there will be long-term potential consequences for endangered animals or migrant birds if measures are not taken to rehabilitate the sediments resulting from metal pollutions.
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DOI：
10.2495/wrm050281
发表时间：
2005-03
期刊：
--
影响因子：
--
作者：
H. Rubio-Arias;R. Saucedo;K. Wood;A. Núñez
通讯作者：
H. Rubio-Arias;R. Saucedo;K. Wood;A. Núñez
影响因子：
3
作者：
G. Muller
通讯作者：
G. Muller
影响因子：
2.7
作者：
MacDonald, DD;Carr, RS;Ingersoll, CG
通讯作者：
Ingersoll, CG
影响因子：
11.8
作者：
Zhigao Sun;Wenguang Sun;C. Tong;C. Zeng;Xiang Yu;X. Mou
通讯作者：
Zhigao Sun;Wenguang Sun;C. Tong;C. Zeng;Xiang Yu;X. Mou
影响因子：
6.8
作者：
B. Nath;P. Chaudhuri;G. Birch
通讯作者：
B. Nath;P. Chaudhuri;G. Birch