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依据2010年4月22日~5月6日对黄渤海调查所得的数据,分析了该海域酸可挥发性硫(AVS)及黄铁矿的含量及分布特征,并对其影响因素进行了初步探讨。结果表明,春季,调查海域沉积物中AVS的含量范围为0~16.04μmol/g dry,平均值为(1.67±1.05)μmol/g dry。AVS含量在不同海区表现为南黄海最低,渤海其次,北黄海略高于渤海。平面分布上,AVS的平面分布呈现近岸高、远海低的特征。AVS的垂直分布则呈先升高后降低的趋势,有78.8%的站位AVS含量最大值出现在5 cm~20 cm。AVS含量的变化主要与沉积物的氧化还原状态、有机质的含量及沉积类型等多种因素有关。调查海区沉积物中黄铁矿的含量范围为(0.89~94.4)μmol/g dry,平均值为(22.68±18.64)μmol/g dry。本次调查的所有站位AVS与黄铁矿比值普遍小于0.3,反应了AVS在深处可有效转化为黄铁矿的趋势。
Based on the survey data from April 22 to May 6, 2010, the content and distribution of acid volatile sulfur (AVS) and pyrite in this area were analyzed and the influencing factors were preliminary analyzed Discussion. The results showed that in the spring, the content of AVS in the sediment from the survey area ranged from 0 to 16.04μmol / g dry with an average of (1.67 ± 1.05) μmol / g dry. AVS content in different sea areas showed the lowest in the South Yellow Sea, followed by the Bohai Sea and slightly higher in the North Yellow Sea than in the Bohai Sea. Plane distribution, AVS plane distribution showed nearshore, far sea features. The vertical distribution of AVS tended to increase first and then decrease, and the maximum AVS content of 78.8% stations appeared at 5 cm-20 cm. The changes of AVS content are mainly related to the redox state of sediments, the content of organic matter and the type of sediment. The contents of pyrite in the sediments from the sea area surveyed ranged from (0.89 to 94.4) μmol / g dry with an average of (22.68 ± 18.64) μmol / g dry. The ratio of AVS to pyrite at all stations in this survey is generally less than 0.3, reflecting the trend of AVS being effectively transformed into pyrite in the depths.