巴西东北部热带红树林沉积物中的痕量金属浓度
Trace metal concentrations in tropical mangrove sediments, NE Brazil.
作者信息
Miola Brígida, Morais Jáder Onofre de, Pinheiro Lidriana de Souza
机构信息
Programa de Pós-graduação em Ciências Marinhas Tropicais, Brazil; Universidade de Fortaleza, Campus P.O. BOX 1321, 60811-905 Fortaleza, CE, Brazil.
Instituto de Ciências do Mar, Universidade Federal do Ceará, P.O BOX. 3207, 60165-081 Fortaleza, CE, Brazil.
出版信息
Mar Pollut Bull. 2016 Jan 15;102(1):206-9. doi: 10.1016/j.marpolbul.2015.11.039. Epub 2015 Nov 20.
Sediment cores were taken from the mangroves of the Coreaú River estuary off the northeast coast of Brazil. They were analyzed for grain size, CaCO3, organic matter, and trace metal (Cd, Pb, Zn, Cu, Al, and Fe) contents. Mud texture was the predominant texture. Levels of trace metals in surface sediments indicated strong influence of anthropogenic processes, and diagenetic processes controlled the trace metal enrichment of core sediments of this estuary. The positive relationships between trace metals and Al and Fe indicate that Cu, Zn, Pb, and Cd concentrations are associated mainly with Al and Fe oxy-hydroxides and have natural sources.
沉积物岩芯取自巴西东北海岸科雷阿乌河河口的红树林。对其进行了粒度、碳酸钙、有机质和痕量金属（镉、铅、锌、铜、铝和铁）含量分析。泥质纹理是主要纹理。表层沉积物中的痕量金属水平表明人为过程的强烈影响，而成岩过程控制了该河口岩芯沉积物的痕量金属富集。痕量金属与铝和铁之间的正相关关系表明，铜、锌、铅和镉的浓度主要与铝和铁的羟基氧化物有关，且具有自然来源。
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