黄河口北部海域硫的地球化学特征

GEOCHEMICAL CHARACTERISTICS OF SULFUR IN THE HUANGHE RIVER ESTUARY'S NORTHERN DISTRICT

硫作为海洋生物地球化学循环中的重要元素,在本学术领域内备受重视。研究表明,硫的化合物是许多海域海水、沉积物、间隙水中重金属、氧化还原环境等的控制性因素(宋金明,1990,1991,1992a,1992b,1993;Andreae,1990; Fossing et al.,1992;Kiene,1992;Lerman,1979)。黄河口附近海域是我国著名的渔场,特别是近年来近海发现了油气田,使此区域成为近海河口区研究的典型场所,因而该海域的建港和油气田开发前期的评价等急需与之相关项目的调查研究。近年来,我所的研究人员对渤海的辽东湾、南黄海、冲绳海槽以及东海等海区硫的体系做了较为系统的调查研究(宋金明,

This paper" deals with the distribution features of SO42-,∑S (-Ⅱ), S2- in seawater and sediment interstitial water, and diffusion flux of sulfur near the sediment-seawater interface in the Huanghe River Estuary’s northern district. SO42-,∑S(-Ⅱ), and S2- concentrations in seawater are high inshore and low offshore, and the vertical changes are small, In sediment interstitial waters SO42-concentrations are low inshore and high offshore; in surface interstitial water ∑S(-Ⅱ)and S2- concentrations are high inshore and low offshores in 30-40cm layer of interstitial waters, ∑S(-Ⅱ) and S2- are low inshore and high offshore and change strongly in vertical distribution. In general, SO42- tends to decrease, ∑S(-Ⅱ) and S2-tend to increase in vertical profiles. SO42- diffusion near the sediment-seawater interface is from overlying water to sediment; and the diffusion flux is -1.614mmol/m2·d inshore, but HS- and S2- diffusions are from sediment (interstitial water) to overlying water, and the diffusion flux of HS" is 8.950nmol/m2·d offshore.