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首页> 外文期刊>Geochimica et Cosmochimica Acta: Journal of the Geochemical Society and the Meteoritical Society >OSMIUM ISOTOPES AND SILVER AS TRACERS OF ANTHROPOGENIC METALS IN SEDIMENTS FROM MASSACHUSETTS AND CAPE COD BAYS
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OSMIUM ISOTOPES AND SILVER AS TRACERS OF ANTHROPOGENIC METALS IN SEDIMENTS FROM MASSACHUSETTS AND CAPE COD BAYS

机译：麻萨诸塞州和开普科德湾的沉积物中的ISO同位素和银作为拟人金属的示踪剂

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High concentrations of osmium (Os) and silver (Ag) and low Os-187/Os-186 ratios in Boston sewage make these elements sensitive tracers of the influence of sewage on marine sediments in Massachusetts and Cape Cod bays. Pristine marine sediments have Ag concentrations more than 200 times lower than sewage sludge, Os concentrations 10-40 times lower, and Os-187/Os-186 ratios six times higher. Surface sediments from both Massachusetts and Cape Cod bays exhibit both high Ag concentrations and low Os-187/Os-186 ratios indicating the influence of sewage particles on marine sediments in this region extends some 70 km from the point of sewage release. In detail, the distribution of Os and Ag do not support a model of simple physical mixing of sewage particles with normal marine sediments. Deviations from the mixing model may be the result of fractionation of Os and Ag in the marine environment, and [or] independent temporal variations in the Os and Ag content of the waste stream. The results of this investigation suggest that osmium isotopes may be widely applicable as tracers of the influence of sewage on sediments in estuarine environments and that subtle variations in the isotopic composition of Os in the waste stream may help constrain the sources of Os and other metals delivered to the environment. [References: 42]
机译：波士顿污水中高浓度的and（Os）和银（Ag）以及低的Os-187 / Os-186比值使这些元素对污水对马萨诸塞州和科德角海湾的海洋沉积物的影响敏感。原始海洋沉积物的Ag浓度比污水污泥低200倍以上，Os浓度低10-40倍，Os-187 / Os-186比高6倍。来自马萨诸塞州和科德角海湾的地表沉积物都显示出高的银浓度和低的Os-187 / Os-186比值，表明该地区的污水颗粒对海洋沉积物的影响距离污水排放点约70公里。详细地讲，Os和Ag的分布不支持将污水颗粒与正常海洋沉积物进行简单物理混合的模型。与混合模型的偏差可能是海洋环境中Os和Ag分离的结果，以及[或]废物流中Os和Ag含量的独立时间变化。这项调查的结果表明，is同位素可广泛用作河口环境中污水对沉积物影响的示踪剂，废物流中Os同位素组成的细微变化可能有助于限制Os和其他金属的来源环境。 [参考：42]

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