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测定了深圳湾海域10个站点表层沉积物中的AVS、TOC和同步浸提重金属(SEM)的含量,对AVS、SEM的平面分布及AVS与SEM和TOC的相互关系进行了分析。结果表明:深圳湾海域表层沉积物AVS含量范围为0.06～7.41μmol/g,平均值为2.51μmol/g;SEM含量范围为0.71～5.15μmol/g,平均值为3.06μmol/g;AVS与SEM的平面分布较一致,呈从湾顶到湾中向湾外逐渐递减的明显趋势。调查海域AVS与SEM和TOC间具有良好的线性相关性,大多数站点∑SEM-AVS的差值均0<(∑SEM-AVS)<5,说明该海域可能存在重金属的中等毒性生态风险。
The contents of AVS, TOC and synchronous leaching of heavy metals (SEM) in the surface sediments of 10 stations in Shenzhen Bay were measured. The distribution of AVS, SEM and the relationship between AVS, SEM and TOC were analyzed. The results showed that the content of AVS in surface sediment of Shenzhen Bay was 0.06 ~ 7.41μmol / g with the average value of 2.51μmol / g, the SEM content was 0.71 ~ 5.15μmol / g, the average was 3.06μmol / g, AVS and SEM The plane distribution is consistent, showing a clear trend of gradual decrease from Bay to Bay to Bay. There is a good linear correlation between AVS and SEM and TOC in the surveyed sea areas. The difference between ΣSEM-AVS and most sites is 0 <(ΣSEM-AVS) <5, indicating that there may be a moderate toxic ecological risk of heavy metals in this area.