Magnetic properties and correlation with heavy metals in mangrove sediments, the case study on the coast of Fujian, China
Magnetic properties and correlation with heavy metals in mangrove sediments, the case study on the coast of Fujian, China
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红树林沉积物磁特性及其与重金属的相关性——以中国福建沿海为例
DOI：
10.1016/j.marpolbul.2019.07.035
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发表时间：
2019
影响因子：
5.8
通讯作者：
Yan Chongling
中科院分区：
文献类型：
--
作者：
Yang Dan;Wang Meina;Lu Haoliang;Ding Zhenhua;Liu Jingchun;Yan Chongling
为了表征沉积物重金属污染的磁性特征并确定红树林中重金属的来源，采集了福建省3种红树林的83个沉积物样品，测定了各种磁性参数和重金属含量。样品之间的磁化强度的变化与伪单畴磁铁矿的变化有关。钴，铜，镍，锌（但不是铬或铅）的平均值略低于背景水平。地球化学证据表明，Co，Cr，Ni，Ti和V与沉积物中的岩石矿物有关，而Cu，Pb和Zn与陆源矿物有关。磁性浓度依赖参数与金属浓度（Cu、Pb和Zn）之间存在较强的正相关性，表明含金属磁性矿物富集，并伴有重金属污染。因此，沉积物磁性和重金属含量的联合评估，为了解复杂条件下的红树林沉积物的污染状况。
To characterize the magnetic signature of sediment heavy metal contamination and identify sources of heavy metals in mangroves, 83 sediment specimens were collected from three mangroves in Fujian, China; various magnetic parameters and heavy metal concentrations were then determined. Variation in magnetic magnetization among specimens was linked to changes in pseudo-single-domain magnetite. Average values of Co, Cu, Ni, and Zn (but not Cr or Pb) were slightly lower than background levels. Geochemical evidence suggested that Co, Cr, Ni, Ti, and V were associated with lithogenic minerals in the sediment, while Cu, Pb, and Zn were associated with terrigenous minerals. A strong positive correlation was seen between magnetic concentration-dependent parameters and metal concentrations (Cu, Pb, and Zn), suggesting enrichment of metal-containing magnetic minerals with heavy metal pollution. The combined assessment of both sediment magnetic properties and heavy metal concentrations thus provides insight into the pollution status of mangrove sediments under complex conditions.