摘要
本文通过对长江口及邻近陆架区12个站位的柱状沉积物、间隙水和细菌资料分析,指出了研究区沉积物和间隙水中铁的分布特征,并与细菌、地质资料对比研究、从生物地球化学角度对间隙水中铁的来源及其控制因素作了初步探讨。资料研究表明,沉积物中铁主要赋存于细粒沉积物中,腐植酸中铁由河口向陆架减少。间隙水中铁主要来自沉积物中高价铁,在弧菌科(Vibrionaceae)和假单孢菌属(Pseudomonas)细菌的媒介下,参加了沉积物中某些有机物的降解反应,接收了有机物的电子后被还原,其含量和分布主要受控于参加媒介作用的细菌。
The distribution characteristics of iron in sediments and pore water, and source of iron in pore water and controlling factors were described in detail by analysis of chemical information on sediments, pore water and organic carbon, as well as bacteria from changjiang Estuary and adjacent continental shelf. The result shows that iron in sediments exists mainly in fine size material ,and iron in humic acid decreases from the estuary toward the continental shelf. Iron in pore water came mainly from reduction of Fe3+ in sediments that attend to the decomposing reaction of organic material under the intermediating of the bacteria (Vibrionaceae and Pseudomonas) and accepted the electron of some organic material. Distribution of Fe2+ in pore water is controlled by the bacteria.
出处
《热带海洋》
CSCD
1991年第1期32-39,共8页
关键词
铁
沉积物
间隙水
细菌
长江口
iron, sediments, pore water, bacteria, biogeochemistry, Changjiang estuary and adjacent continental shelf
