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采集胶州湾河套镇养殖区潮间带高、中、低潮带的沉积物样品 ,将重金属 AVS归一化法应用于粘土质潮间带沉积物研究 ,测定了酸可挥发硫 (AVS)和酸化过程中溶解释放的重金属 (SEM) ,并根据 SEM与 AVS的摩尔浓度关系评价二价重金属 (Cu、Pb、Zn、Cd、Ni)的化学活性和生物可获得性。结果表明 :河套镇养殖区除各潮带表层 0～ 2 cm外 ,SEM/ AVS均小于 1,重金属的生物活性小 ,不会对养殖的底栖生物造成影响。 8cm以下 AVS平均含量高潮带 >中潮带 >低潮带 ,在同一潮位 AVS随深度增加而增加 ;相同潮位的 SEM垂直变化趋势相同
Sediment samples from high, medium and low tidal zones in the aquaculture zone of Hetao Town of Jiaozhou Bay were collected. The AVS normalization method was applied to the study of clay sediment intertidal sediment. The effects of acid volatile sulfur (AVS) and acidification The dissolved and released heavy metals (SEM) were evaluated and the chemical activities and bioavailability of divalent heavy metals (Cu, Pb, Zn, Cd, Ni) were evaluated according to the molar concentrations of SEM and AVS. The results showed that the SEM / AVS of all the tidal zone aquaculture areas except for 0 ~ 2 cm of each tidal zone were less than 1, and the bioactivity of heavy metals was small, which would not affect the benthos cultured. The mean AVS concentration below 8 cm was in the climax zone> mid-tidal zone> low-tidal zone, and the AVS increased with depth at the same tide level. The SEM vertical trend of the same tidal level was the same