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本文通过对长江口及邻近陆架区10个站位表层沉积物和间隙水中锰、有机碳、硫化物和细菌的资料研究表明:沉积物中锰的变化范围为0.062—0.123％,平均含量为0.091％。间隙水中Mn~(2+)的变化在0.03—8.00ppm之间,平均含量为1.27ppm。沉积物中锰由河口向海洋减少,表层高于深层;间隙水中锰由表层向下递增。间隙水中Mn~(2+)主要来自沉积物中Mn~(4+)的还原,这种还原作用并不是沉积物中硫化物引起的,而是在细菌的媒介下,Mn~(4+)参与沉积物中某些有机物的降解反应时获得电子后被还原的,故它的含量和分布主要受细菌控制。
Based on the data of manganese, organic carbon, sulfide and bacteria in surface sediment and interstitial water of 10 stations in the Yangtze Estuary and its adjacent shelf area, the results show that the variation range of manganese in sediments is 0.062-0.123% and the average content is 0.091 %. The change of Mn ~ (2+) in interstitial water was between 0.03-8.00ppm and the average content was 1.27ppm. Manganese in the sediments decreased from the estuary to the ocean, the surface layer was higher than the deep layer, and the manganese in the interstitial water increased downward from the surface layer. The Mn 2+ in the interstitial water mainly comes from the reduction of Mn 4+ in the sediments. The reduction is not caused by sulphide in the sediment, but under the medium of bacteria, Mn 4+, Participate in sediment degradation of some organic matter obtained after the electron was reduced, so its content and distribution are mainly controlled by bacteria.