Sulfur Speciation and Cycling in Black Sea Waters

这一研究项目的首席研究员最近开发了极谱技术来测量海洋孔隙水中的无机和有机硫物种。这些物种包括硫代硫酸盐、亚硫酸盐、四硫酸盐、二硫化物和多硫化物如S(-2)，多硫化物如S(O)、硫醇和有机二硫化物。他在盐沼孔隙水中使用的这些方法表明，有机硫和无机硫之间存在着通过黄铁矿形成及其随后的氧化而发生的循环。他预计，类似的过程可能会发生在黑海的氧气/缺氧界面上。他建议1)测量上述硫物种，2)了解它们的形成、循环以及与黑海水域和孔隙水中金属的相互作用。为了实现这一目标，他的研究工作正在与1)Landing博士和Jacobs博士协调进行，他们建议研究微量金属生物地球化学和物种形成；2)Jannasch博士和Mopper博士分别建议研究黑海水柱中的微生物过程和羰基形成。

The principal investigator of this research project has recently developed polarographic techniques to measure inorganic and organic sulfur species in marine porewaters. Included among these species are thiosulfate, sulfite, tetrathionate, bisulfide and polysulfide as S(-2), polysulfide as S(O), thiols and organic disulfides. His use of these methods for salt marsh porewaters has shown that there is cycling between organic and inorganic sulfur species via pyrite formation and its consequent oxidation. He expects similar processes may be occurring at the oxic/anoxic interface in the Black Sea. He proposes 1) to measure the above sulfur species and 2) to develop an understanding of their formation, cycling, and interactions with metals in Black Sea waters and porewaters. In order to accomplish this goal, his research efforts are being coordinated with 1) Drs. Landing and Jacobs who are proposing to study trace metal biogeochemistry and speciation, and 2) Drs. Jannasch and Mopper who are proposing to study microbiological processes and carbonyl formation respectively in the water column of the Black Sea.