上海市滨岸带沉积物中酸挥发性硫化物垂直分布及空间变化特征

Vertical Profile and Spatial Distribution of Acid-Volatile Sulfide in the Estuarine and Coastal Sediments of Shanghai City

对上海市滨岸带（北起浏河口,南至杭州湾的金丝娘桥）18个柱状沉积物中酸挥发性硫化物（AVS）质量分数及其垂直分布特征进行了研究.结果表明：沉积物中w（AVS）为0.38-317.60 mg/kg,底层沉积物中w（AVS）平均值最高,是表层和中层的2倍左右.各采样点沉积物中底层w（AVS）空间变化差异最大,表层w（AVS）变化较小.人类活动干扰（滨岸带围垦、工业排污和生活排污和畜禽养殖等）显著改变了潮滩原有的自然环境特征〔w（有机碳）、含水率、粒度组成以及氧化还原电位等〕,可能成为控制上海市滨岸带沉积物中w（AVS）空间变化差异的决定性因素.

Eighteen sediment cores collected from the estuarine and coastal zone of Shanghai City （from the northernmost point-Liuhe Estuaryto the southernmost point - Jinsiniang Bridge of Hangzhou Bay） were analyzed to investigate sediment acid-volatile sulfide （AVS） content and its vertical profde and spatial distribution characteristics. The results showed that the AVS content of the sediments ranged from 0.38 to 317.60 mg/kg. The average AVS content was highest in the bottom layer of the sediment core, which was almost two times that of the surface layer and middle layer. The spatial distribution of AVS content showed significant changes in the bottom layer sediments, but showed only slight changes in the surface layer sediments. Human activities such as coastal zone reclamation, industrial sewage, living sewage, and animal husbandiT, etc. may be the primary factors affecting AVS spatial distribution in the estuarine and coastal sediments of Shanghai City, since the natural environmental factors such as the sediment organic carbon content, water ratio, granule size and Ea changed deeply.