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海水中铂族元素(PGEs)的含量和赋存形态与其生物地球化学行为及生态风险密切相关,但如何确定海水中PGEs的含量和形态一直是研究的难点.螯合树脂对特定元素和特定配体结构的识别特性为突破这一瓶颈提供了可能.因此,本文综述了海水中铂族元素赋存形态的研究现状,讨论了螯合树脂吸附铂族元素的机理,并对比了不同类型螯合树脂对铂族元素的富集.结果表明:海水中PGEs的无机络合形态主要由[MCl_3OH~(2-)]/[MCl_4~(2-)](M=Pt、Pd)及M(OH)_3~(3-n)(n=3~6)(M=Rh)组成;螯合树脂对PGEs的不同络合形态有一定的识别性;氮-硫型螯合树脂是研究实际条件下海水中PGEs的理想树脂.
The content and morphology of PGEs in seawater are closely related to their biogeochemical behavior and ecological risk, but how to determine the content and morphology of PGEs in seawater has always been the research difficult.Chelation of chelating resins to specific elements and specific The identification of body structure provides the possibility to break through this bottleneck.Therefore, the research status of the occurrence of platinum group elements in seawater is reviewed in this paper. The mechanism of adsorption of platinum group elements by chelating resins is discussed. Different types of chelates The results showed that the inorganic complexes of PGEs in seawater were mainly composed of [MCl_3OH ~ (2 -)] / [MCl_4 ~ (2 -)] (M = Pt, Pd) and M ) _3 ~ (3-n) (n = 3 ~ 6) (M = Rh). The chelating resin has certain recognition of the different complexation forms of PGEs. The nitrogen-sulfur chelate resin is studied under the actual conditions Ideal resin for seawater PGEs.