上海滨岸带沉积物AVS空间分布特征

Spatial distribution of acid volatile sulfide (AVS) in sediments of Shanghai coastal zone

对上海滨岸带（北起与江苏省交界的浏河口南到与浙江省交界的金丝娘桥）沉积物酸可挥发性硫化物（AVS）污染现状及其含量的空间分布特征进行了调查研究。结果表明,上海滨岸带AVS含量在（0.56~161.06）×10-6之间,平均值为17.98×10-6。AVS含量与各环境因子相关分析得出,影响上海滨岸带AVS分布的主导因素是有机碳,其次为含水率,而氧化-还原电位相关性不显著。采用单因子评价方法分析,表明上海滨岸带AVS污染指数范围在0.002~0.537,均未超标,北段AVS污染指数〉南段〉中段。其中AVS污染指数超过0.1的采样站位共有13个,主要受自然地理环境（有机碳含量、水深）和人类活动（人为排污、水产养殖）的影响。

AVS pollution in sediments of Shanghai coastal zone from Liuhe Estuary to Jinsiniang Bridge was determined,and spatial distribution of AVS was discussed.The results show AVS concentrations in sediments of Shanghai coastal zone ranged from 0.56×10-6 to 161.06×10-6 with average value of 17.98×10-6.There is the significantly positive correlation the sediment AVS concentrations with sediment organic carbon contents and water ratio.However,there is not the significant correlation AVS concentration with redox potential.The single pollution index method was used to assess AVS pollution status in the sediment.The range of AVS pollution index was between 0.002 and 0.537.AVS pollution index of the north section was higher than south section,and the index of middle section was the lowest.Because of the effect of natural geography environment（organic carbon concentrations,water depth） and human activities（pollution,aquiculture）,AVS pollution index of 13 sampling sites were more than 0.1.