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Effect of marine phytoplankton on metal sorption, bioaccumulation, and species distribution in the euphotic layer of the coastal seawater

Abstract

研究海洋浮游植物、微量金属及其耦合作用引发光化学过程的机制;建立海水中微量金属锑的价态检测新技术;探讨近海浮游植物在氮磷富营养化状况下对金属吸附、吸收、生物富集和形态分布的影响;探究近海真光层中营养盐、浮游植物、重金属多元体系中光致羟自由基的形成,即光诱导微量金属价态转化的可能机制。取得了以下主要成果: 1.建立锑价态分析、有效避免Sb(III)氧化的新方法 锑的形态分析是痕量元素形态分析的热点和难点,因为锑被美国环境保护规划署、欧共体和德国列为污染控制优先污染物和环境激素类重金属,Sb(III)极易被氧化;锑在环境、生物和地球化学样品中主要以Sb(III)和Sb(V)存在;Sb(III)...1. A novel method for prevention of the oxidation of Sb(Ⅲ) during sample pretreatment, preconcentration of Sb(Ⅲ) and Sb(V) with nanometer size titanium dioxide (rutile) and speciation analysis of antimony, has been developed. Antimony(III) could be selectively determined by flow injection-hydride generation-atomic absorption spectrometry, coexisting with Sb(V). Trace Sb(Ⅲ) and Sb(V) were all adsor...学位:博士后院系专业:海洋与环境学院海洋学系_海洋科学学号:BH1700021

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