山东北部近岸海域沉积物中酸可挥发性硫化物的分布特征研究OA

Using acid-volatile sulfide(AVS)and organic carbon data obtained from surface sediments in the coastal waters of northern Shandong during July to August 2024,the spatial distribution patterns and influencing factors of AVS were investigated.The mean AVS content was(72.5±100)mg/kg,and pronounced spatial variability was ob-served across the study area.In the northern coastal waters of Binzhou and Dongying,elevated AVS levels resulted from organic matter input via runoff and Binzhou Port,coupled with weak hydrodynamic conditions imposed by Bohai Bay and port infrastructure.In the Yellow River estuary,AVS was governed primarily by riverine organic matter delivery and the estuarine hydrodynamic regime.A highly significant positive correlation between AVS and organic carbon content in Laizhou Bay sediments,together with the lower redox potential at the high-AVS center,suggested that organic matter input from runoff and anthropogenic activities,compounded by the obstructive effects of shoreline modifications and large-scale port construction,exerted a considerable influence on AVS accumulation in Laizhou Bay.In the northern waters of Yantai and Weihai,the elevated AVS content and its spatial distribution were associated with mariculture operations in the area,along with the material transport capacity and sedimenta-tion rate of the Yellow Sea Coastal Current.