作　　者： ; ; ; ; ;

机构地区： 中国科学院海洋研究所

出　　处： 《中国石油大学学报（自然科学版）》 2007年第6期27-33,39,共8页

摘　　要： 酸可挥发硫化物(AVS)是沉积物中的单硫化二价金属部分,是研究碳循环与硫循环的重要介质。从AVS的控制因素入手,对青岛市胶州湾李村河口区4个沉积柱状样中的AVS和有机质与活性铁含量进行了科学检测,探讨了其环境响应特征。结果表明,该区沉积物中的AVS含量较高(198.41μmol/g),与一些热带港湾的富硫酸盐含量接近,这与该区的高有机质、高沉积速率和高活性铁含量相关。沉积环境是控制AVS含量的内因,不同的沉积环境能够导致AVS生成的制约因素发生变化,近河口区的AVS生成受到活性铁含量的制约,而远离河口区则受到有机质含量的制约,其制约能力从高到低的排列顺序为有机质含量与来源、活性铁含量、氧化还原电位、沉积速率、硫酸盐含量。另外,由于近河口处的高AVS含量及活性铁的控制,导致AVS成为重金属的主要附存方式,这将为重金属的再循环(毒性)研究提供重要的参考依据。 The acid volatile sulfide （AVS） is the fraction of monosulfuring divalent metal. It is important medium for carbon cycle and sulfur cycle. By reseaching AVS controlling factors, the AVS, organic matter and reactive Fe contents of four sediment cores collected from the Licun estuary of the Jiaozhou Bay near Qingdao, China, were examined , and the environmental response of AVS was discussed. The results show that the AVS content of 198.41 μmol/g is relatively high and approaches that of some tropic rich sulfate bays, which relates to the high organic matter, rate of deposition and reactive Fe content. The sedimental environment was the inherence causation of the AVS content. AVS near the estuary was restrained by reactive Fe content, but that faraway the estuary was restrained by organic content. And the controlling factors in descending order of constraint capability are organic content and source, reactive Fe content, Eh, sedimentation rate, sulfate content. The high content of AVS and the control of reactive Fe make the reactive faction of heavy metals adhere to AVS near the estuary. This can provide an important basis for the recirculation study of heavy metals.

关 键 词： 胶州湾 三角洲 酸可挥发硫化物 有机碳 活性铁 控制因素

领　　域： [天文地球] [天文地球]