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This paper discusses the geochemical characteristics of the interstitial water of the Bohai Gulf, where the main salt contents (K+, Na+, Ca++ Mg+ + , C1-, HCO3-, SO4-) in 55 sedimentary layers of 13 cores (3-4 m in length) and those of bottom seawater have been determined and the exchange capacity and exchange cations (K+, Na+, Ca++, Mg++) of the layers analysed (see Fig. 1)Fig. J. The stations of core samplings in the Bohai Gult. 相似文献
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廖先贵 《海洋学报(英文版)》1986,5(2):215-219
This paper deals with the geochemical characteristics of arsenic in sediments from Bohai Gulf. The arsenic in seawater, surface sediments and cores is determined. Also measured are other physical and chemical parameters, such as Ni, Fe, C, pH and Eh in sediments. The values of As range from 0.6 to 4.5 ppb in seawater, from 10.0 to 20.9 ppm in surface sediments and from 6.8 to 22.8 ppm in cores.The contents of As from south are higher than those from north. However the As in sediments is the element not affected by pollution.The adsorption and codeposition of Ferric oxide colloid are the major form of transference of As from seawater to sediments in Bohai Gulf.The valence state of As in sediments is HAsO42- 相似文献
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廖先贵 《矿物岩石地球化学通报》1986,(1)
海洋地球化学在六十年代就已经成熟起来。它已经从少数海洋化学家仅为解决物理的或生物学的问题而进行海水的化学分析,改变为海洋化学家参与并领导世界范围的海洋考察。七十年代以来,由于象地球化学海洋断面研究计划(GEOSECS)这样长期而大尺度的全面考察和CEPEX之类的受控试验研究,使得海洋地球化学得到迅速发展。目前,海洋地球化学正依如下四个发展阶段迅速向前迈进:(1)用化学术语描述海洋(包括选定化学组 相似文献
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为研究沉积作用和沉积环境,采用压榨法于渤海湾13个柱样中获取了55个层次的间隙水。测定了间隙水的主要盐类成分以及沉积物交换容量和交换性阳离子。结果表明:间隙水的主要盐类成分高于其上覆底层海水,但仍属于现代海水;存在微弱的硫酸盐还原作用;Ca2+、Mg2+由液相转入固相,K+、Na+由固相转入液相,阳离子在固—液相平衡中的交换次序为K+>Na+>Mg2+>Ca2+。同时,从三个柱样间隙水的含盐度(>40‰)看出,海盆当时的沉积环境是蒸发量远大于淡水流入量。 相似文献
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渤海湾底质中砷的地球化学特征 总被引:1,自引:0,他引:1
为了评价渤海湾的污染状况,自1978年至1982年,作者研究了砷在渤海湾底质中的地球化学行为,根据64个表层底质样,11个土柱的116层次的柱状底质样以及部分表层海水样中含砷量的资料,表明渤海湾尚未受到砷的污染。同时,根据底质中含砷量与底质的pH、Eh、铁、镍、有机质等相关性分析,探讨了砷自海水向底质转移的形式及其在底质中的存在形态。 相似文献